cc: Switch RenderingStats collection in Layer::Update() to RenderingStatsInstrumentation

This change switches all of the remaining RenderingStats collection in
composited mode to use RenderinStatsInstrumentation.

BUG=181319


Review URL: https://chromiumcodereview.appspot.com/12426024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@191086 0039d316-1c4b-4281-b951-d872f2087c98

59 files changed, 280 insertions, 316 deletions

diff --git a/cc/debug/rendering_stats_instrumentation.cc b/cc/debug/rendering_stats_instrumentation.cc
index f19daae..b1968f3 100644
--- a/cc/debug/rendering_stats_instrumentation.cc
+++ b/cc/debug/rendering_stats_instrumentation.cc
@@ -36,14 +36,6 @@ base::TimeDelta RenderingStatsInstrumentation::EndRecording(
   return base::TimeDelta();
 }
 
-void RenderingStatsInstrumentation::AddStats(const RenderingStats& other) {
-  if (!record_rendering_stats_)
-    return;
-
-  base::AutoLock scoped_lock(lock_);
-  rendering_stats_.Add(other);
-}
-
 void RenderingStatsInstrumentation::IncrementAnimationFrameCount() {
   if (!record_rendering_stats_)
     return;
diff --git a/cc/debug/rendering_stats_instrumentation.h b/cc/debug/rendering_stats_instrumentation.h
index c3ec320..6d26857 100644
--- a/cc/debug/rendering_stats_instrumentation.h
+++ b/cc/debug/rendering_stats_instrumentation.h
@@ -32,10 +32,6 @@ class CC_EXPORT RenderingStatsInstrumentation {
   base::TimeTicks StartRecording() const;
   base::TimeDelta EndRecording(base::TimeTicks start_time) const;
 
-  // TODO(egraether): Remove after switching Layer::update() to use this class.
-  // Used in LayerTreeHost::paintLayerContents().
-  void AddStats(const RenderingStats& other);
-
   void IncrementAnimationFrameCount();
   void SetScreenFrameCount(int64 count);
   void SetDroppedFrameCount(int64 count);
diff --git a/cc/layers/content_layer.cc b/cc/layers/content_layer.cc
index c29d72e..4ad1bc7 100644
--- a/cc/layers/content_layer.cc
+++ b/cc/layers/content_layer.cc
@@ -68,8 +68,7 @@ void ContentLayer::SetTexturePriorities(
 }
 
 void ContentLayer::Update(ResourceUpdateQueue* queue,
-                          const OcclusionTracker* occlusion,
-                          RenderingStats* stats) {
+                          const OcclusionTracker* occlusion) {
   {
     base::AutoReset<bool> ignore_set_needs_commit(&ignore_set_needs_commit_,
                                                   true);
@@ -78,7 +77,7 @@ void ContentLayer::Update(ResourceUpdateQueue* queue,
     UpdateCanUseLCDText();
   }
 
-  TiledLayer::Update(queue, occlusion, stats);
+  TiledLayer::Update(queue, occlusion);
   needs_display_ = false;
 }
 
@@ -96,11 +95,17 @@ void ContentLayer::CreateUpdaterIfNeeded() {
   scoped_ptr<LayerPainter> painter =
       ContentLayerPainter::Create(client_).PassAs<LayerPainter>();
   if (layer_tree_host()->settings().accelerate_painting)
-    updater_ = SkPictureContentLayerUpdater::Create(painter.Pass());
+    updater_ = SkPictureContentLayerUpdater::Create(
+        painter.Pass(),
+        rendering_stats_instrumentation());
   else if (layer_tree_host()->settings().per_tile_painting_enabled)
-    updater_ = BitmapSkPictureContentLayerUpdater::Create(painter.Pass());
+    updater_ = BitmapSkPictureContentLayerUpdater::Create(
+        painter.Pass(),
+        rendering_stats_instrumentation());
   else
-    updater_ = BitmapContentLayerUpdater::Create(painter.Pass());
+    updater_ = BitmapContentLayerUpdater::Create(
+        painter.Pass(),
+        rendering_stats_instrumentation());
   updater_->SetOpaque(contents_opaque());
 
   unsigned texture_format =
diff --git a/cc/layers/content_layer.h b/cc/layers/content_layer.h
index 79394de..0f00cfd 100644
--- a/cc/layers/content_layer.h
+++ b/cc/layers/content_layer.h
@@ -44,8 +44,7 @@ class CC_EXPORT ContentLayer : public TiledLayer {
   virtual void SetTexturePriorities(const PriorityCalculator& priority_calc)
       OVERRIDE;
   virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion,
-                      RenderingStats* stats) OVERRIDE;
+                      const OcclusionTracker* occlusion) OVERRIDE;
   virtual bool NeedMoreUpdates() OVERRIDE;
 
   virtual void SetContentsOpaque(bool contents_opaque) OVERRIDE;
diff --git a/cc/layers/content_layer_unittest.cc b/cc/layers/content_layer_unittest.cc
index 25421e7..b1c6a11 100644
--- a/cc/layers/content_layer_unittest.cc
+++ b/cc/layers/content_layer_unittest.cc
@@ -6,6 +6,7 @@
 
 #include "cc/layers/content_layer_client.h"
 #include "cc/resources/bitmap_content_layer_updater.h"
+#include "cc/test/fake_rendering_stats_instrumentation.h"
 #include "cc/test/geometry_test_utils.h"
 #include "skia/ext/platform_canvas.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -37,17 +38,18 @@ TEST(ContentLayerTest, ContentLayerPainterWithDeviceScale) {
   gfx::RectF opaque_rect_in_content_space = gfx::ScaleRect(
       opaque_rect_in_layer_space, contents_scale, contents_scale);
   MockContentLayerClient client(opaque_rect_in_layer_space);
+  FakeRenderingStatsInstrumentation stats_instrumentation;
   scoped_refptr<BitmapContentLayerUpdater> updater =
-      BitmapContentLayerUpdater::Create(ContentLayerPainter::Create(&client).
-                                            PassAs<LayerPainter>());
+      BitmapContentLayerUpdater::Create(
+          ContentLayerPainter::Create(&client).PassAs<LayerPainter>(),
+          &stats_instrumentation);
 
   gfx::Rect resulting_opaque_rect;
   updater->PrepareToUpdate(content_rect,
                            gfx::Size(256, 256),
                            contents_scale,
                            contents_scale,
-                           &resulting_opaque_rect,
-                           NULL);
+                           &resulting_opaque_rect);
 
   EXPECT_RECT_EQ(gfx::ToEnclosingRect(opaque_rect_in_content_space),
                  resulting_opaque_rect);
diff --git a/cc/layers/contents_scaling_layer.cc b/cc/layers/contents_scaling_layer.cc
index d602e88..01abcfe 100644
--- a/cc/layers/contents_scaling_layer.cc
+++ b/cc/layers/contents_scaling_layer.cc
@@ -35,8 +35,7 @@ void ContentsScalingLayer::CalculateContentsScale(
 
 void ContentsScalingLayer::Update(
     ResourceUpdateQueue* queue,
-    const OcclusionTracker* occlusion,
-    RenderingStats* stats) {
+    const OcclusionTracker* occlusion) {
   if (draw_properties().contents_scale_x == last_update_contents_scale_x_ &&
       draw_properties().contents_scale_y == last_update_contents_scale_y_)
     return;
diff --git a/cc/layers/contents_scaling_layer.h b/cc/layers/contents_scaling_layer.h
index 04879d5..a3dc9bb 100644
--- a/cc/layers/contents_scaling_layer.h
+++ b/cc/layers/contents_scaling_layer.h
@@ -23,8 +23,7 @@ class CC_EXPORT ContentsScalingLayer : public Layer {
 
   virtual void Update(
     ResourceUpdateQueue* queue,
-    const OcclusionTracker* occlusion,
-    RenderingStats* stats) OVERRIDE;
+    const OcclusionTracker* occlusion) OVERRIDE;
 
  protected:
   ContentsScalingLayer();
diff --git a/cc/layers/heads_up_display_layer.cc b/cc/layers/heads_up_display_layer.cc
index 76016b5..9945178 100644
--- a/cc/layers/heads_up_display_layer.cc
+++ b/cc/layers/heads_up_display_layer.cc
@@ -23,8 +23,7 @@ HeadsUpDisplayLayer::HeadsUpDisplayLayer() : Layer() {
 HeadsUpDisplayLayer::~HeadsUpDisplayLayer() {}
 
 void HeadsUpDisplayLayer::Update(ResourceUpdateQueue*,
-                                 const OcclusionTracker*,
-                                 RenderingStats*) {
+                                 const OcclusionTracker*) {
   const LayerTreeDebugState& debug_state = layer_tree_host()->debug_state();
   int max_texture_size =
       layer_tree_host()->GetRendererCapabilities().max_texture_size;
diff --git a/cc/layers/heads_up_display_layer.h b/cc/layers/heads_up_display_layer.h
index 31294d8..c81d47e 100644
--- a/cc/layers/heads_up_display_layer.h
+++ b/cc/layers/heads_up_display_layer.h
@@ -16,8 +16,7 @@ class CC_EXPORT HeadsUpDisplayLayer : public Layer {
   static scoped_refptr<HeadsUpDisplayLayer> Create();
 
   virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* tracker,
-                      RenderingStats* stats) OVERRIDE;
+                      const OcclusionTracker* tracker) OVERRIDE;
   virtual bool DrawsContent() const OVERRIDE;
 
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
diff --git a/cc/layers/image_layer.cc b/cc/layers/image_layer.cc
index 4f5e105..59cf913 100644
--- a/cc/layers/image_layer.cc
+++ b/cc/layers/image_layer.cc
@@ -41,8 +41,7 @@ void ImageLayer::SetTexturePriorities(const PriorityCalculator& priority_calc) {
 }
 
 void ImageLayer::Update(ResourceUpdateQueue* queue,
-                        const OcclusionTracker* occlusion,
-                        RenderingStats* stats) {
+                        const OcclusionTracker* occlusion) {
   CreateUpdaterIfNeeded();
   if (needs_display_) {
     updater_->set_bitmap(bitmap_);
@@ -50,7 +49,7 @@ void ImageLayer::Update(ResourceUpdateQueue* queue,
     InvalidateContentRect(gfx::Rect(content_bounds()));
     needs_display_ = false;
   }
-  TiledLayer::Update(queue, occlusion, stats);
+  TiledLayer::Update(queue, occlusion);
 }
 
 void ImageLayer::CreateUpdaterIfNeeded() {
diff --git a/cc/layers/image_layer.h b/cc/layers/image_layer.h
index 8ba5b78..25ddf12 100644
--- a/cc/layers/image_layer.h
+++ b/cc/layers/image_layer.h
@@ -23,8 +23,7 @@ class CC_EXPORT ImageLayer : public TiledLayer {
   virtual void SetTexturePriorities(const PriorityCalculator& priority_calc)
       OVERRIDE;
   virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion,
-                      RenderingStats* stats) OVERRIDE;
+                      const OcclusionTracker* occlusion) OVERRIDE;
   virtual void CalculateContentsScale(float ideal_contents_scale,
                                       bool animating_transform_to_screen,
                                       float* contents_scale_x,
diff --git a/cc/layers/layer.cc b/cc/layers/layer.cc
index bdd2a4f..c5a2ad8 100644
--- a/cc/layers/layer.cc
+++ b/cc/layers/layer.cc
@@ -818,4 +818,8 @@ ScrollbarLayer* Layer::ToScrollbarLayer() {
   return NULL;
 }
 
+RenderingStatsInstrumentation* Layer::rendering_stats_instrumentation() const {
+  return layer_tree_host_->rendering_stats_instrumentation();
+}
+
 }  // namespace cc
diff --git a/cc/layers/layer.h b/cc/layers/layer.h
index 2e72e63..6a1f3b2 100644
--- a/cc/layers/layer.h
+++ b/cc/layers/layer.h
@@ -43,7 +43,7 @@ class PriorityCalculator;
 class ResourceUpdateQueue;
 class ScrollbarLayer;
 struct AnimationEvent;
-struct RenderingStats;
+class RenderingStatsInstrumentation;
 
 // Base class for composited layers. Special layer types are derived from
 // this class.
@@ -267,8 +267,7 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
   // These methods typically need to be overwritten by derived classes.
   virtual bool DrawsContent() const;
   virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion,
-                      RenderingStats* stats) {}
+                      const OcclusionTracker* occlusion) {}
   virtual bool NeedMoreUpdates();
   virtual void SetIsMask(bool is_mask) {}
 
@@ -370,6 +369,8 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
   bool NeedsDisplayForTesting() const { return needs_display_; }
   void ResetNeedsDisplayForTesting() { needs_display_ = false; }
 
+  RenderingStatsInstrumentation* rendering_stats_instrumentation() const;
+
  protected:
   friend class LayerImpl;
   friend class TreeSynchronizer;
diff --git a/cc/layers/nine_patch_layer.cc b/cc/layers/nine_patch_layer.cc
index 45c69eb..9a5022d 100644
--- a/cc/layers/nine_patch_layer.cc
+++ b/cc/layers/nine_patch_layer.cc
@@ -57,8 +57,7 @@ void NinePatchLayer::SetBitmap(const SkBitmap& bitmap, gfx::Rect aperture) {
 }
 
 void NinePatchLayer::Update(ResourceUpdateQueue* queue,
-                            const OcclusionTracker* occlusion,
-                            RenderingStats* stats) {
+                            const OcclusionTracker* occlusion) {
   CreateUpdaterIfNeeded();
 
   if (resource_ &&
diff --git a/cc/layers/nine_patch_layer.h b/cc/layers/nine_patch_layer.h
index 9d6498c..f1a98d4 100644
--- a/cc/layers/nine_patch_layer.h
+++ b/cc/layers/nine_patch_layer.h
@@ -24,8 +24,7 @@ class CC_EXPORT NinePatchLayer : public Layer {
   virtual void SetTexturePriorities(const PriorityCalculator& priority_calc)
       OVERRIDE;
   virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion,
-                      RenderingStats* stats) OVERRIDE;
+                      const OcclusionTracker* occlusion) OVERRIDE;
   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
 
   // aperture is in the pixel space of the bitmap resource and refers to
diff --git a/cc/layers/nine_patch_layer_unittest.cc b/cc/layers/nine_patch_layer_unittest.cc
index a274100..84c5348 100644
--- a/cc/layers/nine_patch_layer_unittest.cc
+++ b/cc/layers/nine_patch_layer_unittest.cc
@@ -73,7 +73,7 @@ TEST_F(NinePatchLayerTest, TriggerFullUploadOnceWhenChangingBitmap) {
 
   // No bitmap set should not trigger any uploads.
   test_layer->SetTexturePriorities(calculator);
-  test_layer->Update(&queue, &occlusion_tracker, NULL);
+  test_layer->Update(&queue, &occlusion_tracker);
   EXPECT_EQ(queue.FullUploadSize(), 0);
   EXPECT_EQ(queue.PartialUploadSize(), 0);
 
@@ -83,7 +83,7 @@ TEST_F(NinePatchLayerTest, TriggerFullUploadOnceWhenChangingBitmap) {
   bitmap.allocPixels();
   test_layer->SetBitmap(bitmap, gfx::Rect(5, 5, 1, 1));
   test_layer->SetTexturePriorities(calculator);
-  test_layer->Update(&queue, &occlusion_tracker, NULL);
+  test_layer->Update(&queue, &occlusion_tracker);
   EXPECT_EQ(queue.FullUploadSize(), 1);
   EXPECT_EQ(queue.PartialUploadSize(), 0);
   ResourceUpdate params = queue.TakeFirstFullUpload();
@@ -107,7 +107,7 @@ TEST_F(NinePatchLayerTest, TriggerFullUploadOnceWhenChangingBitmap) {
 
   // Nothing changed, so no repeated upload.
   test_layer->SetTexturePriorities(calculator);
-  test_layer->Update(&queue, &occlusion_tracker, NULL);
+  test_layer->Update(&queue, &occlusion_tracker);
   EXPECT_EQ(queue.FullUploadSize(), 0);
   EXPECT_EQ(queue.PartialUploadSize(), 0);
   {
@@ -119,7 +119,7 @@ TEST_F(NinePatchLayerTest, TriggerFullUploadOnceWhenChangingBitmap) {
 
   // Reupload after eviction
   test_layer->SetTexturePriorities(calculator);
-  test_layer->Update(&queue, &occlusion_tracker, NULL);
+  test_layer->Update(&queue, &occlusion_tracker);
   EXPECT_EQ(queue.FullUploadSize(), 1);
   EXPECT_EQ(queue.PartialUploadSize(), 0);
 
@@ -129,7 +129,7 @@ TEST_F(NinePatchLayerTest, TriggerFullUploadOnceWhenChangingBitmap) {
   EXPECT_EQ(NULL, params.texture->resource_manager());
   test_layer->SetTexturePriorities(calculator);
   ResourceUpdateQueue queue2;
-  test_layer->Update(&queue2, &occlusion_tracker, NULL);
+  test_layer->Update(&queue2, &occlusion_tracker);
   EXPECT_EQ(queue2.FullUploadSize(), 1);
   EXPECT_EQ(queue2.PartialUploadSize(), 0);
   params = queue2.TakeFirstFullUpload();
diff --git a/cc/layers/picture_layer.cc b/cc/layers/picture_layer.cc
index b758f6d..32724d7 100644
--- a/cc/layers/picture_layer.cc
+++ b/cc/layers/picture_layer.cc
@@ -68,8 +68,7 @@ void PictureLayer::SetNeedsDisplayRect(const gfx::RectF& layer_rect) {
 }
 
 void PictureLayer::Update(ResourceUpdateQueue*,
-                          const OcclusionTracker*,
-                          RenderingStats* stats) {
+                          const OcclusionTracker*) {
   // Do not early-out of this function so that PicturePile::Update has a chance
   // to record pictures due to changing visibility of this layer.
 
@@ -87,7 +86,7 @@ void PictureLayer::Update(ResourceUpdateQueue*,
                 background_color(),
                 pile_invalidation_,
                 visible_layer_rect,
-                stats);
+                rendering_stats_instrumentation());
 }
 
 void PictureLayer::SetIsMask(bool is_mask) {
diff --git a/cc/layers/picture_layer.h b/cc/layers/picture_layer.h
index 0cb1583..a68bef7 100644
--- a/cc/layers/picture_layer.h
+++ b/cc/layers/picture_layer.h
@@ -15,7 +15,6 @@ namespace cc {
 
 class ContentLayerClient;
 class ResourceUpdateQueue;
-struct RenderingStats;
 
 class CC_EXPORT PictureLayer : public ContentsScalingLayer {
  public:
@@ -32,8 +31,7 @@ class CC_EXPORT PictureLayer : public ContentsScalingLayer {
   virtual void SetNeedsDisplayRect(const gfx::RectF& layer_rect) OVERRIDE;
   virtual void Update(
       ResourceUpdateQueue* queue,
-      const OcclusionTracker* occlusion,
-      RenderingStats* stats) OVERRIDE;
+      const OcclusionTracker* occlusion) OVERRIDE;
   virtual void SetIsMask(bool is_mask) OVERRIDE;
 
  protected:
diff --git a/cc/layers/picture_layer_impl_unittest.cc b/cc/layers/picture_layer_impl_unittest.cc
index 962d927..afbb597 100644
--- a/cc/layers/picture_layer_impl_unittest.cc
+++ b/cc/layers/picture_layer_impl_unittest.cc
@@ -11,6 +11,7 @@
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/fake_output_surface.h"
+#include "cc/test/fake_rendering_stats_instrumentation.h"
 #include "cc/test/impl_side_painting_settings.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -95,7 +96,8 @@ class TestablePicturePileImpl : public PicturePileImpl {
       return;
     gfx::Rect bounds(tiling().TileBounds(x, y));
     scoped_refptr<Picture> picture(Picture::Create(bounds));
-    picture->Record(&client_, NULL, tile_grid_info_);
+    FakeRenderingStatsInstrumentation stats_instrumentation;
+    picture->Record(&client_, &stats_instrumentation, tile_grid_info_);
     picture_list_map_[std::pair<int, int>(x, y)].push_back(picture);
     EXPECT_TRUE(HasRecordingAt(x, y));
 
diff --git a/cc/layers/scrollbar_layer.cc b/cc/layers/scrollbar_layer.cc
index c5f15b7..1bf71e6 100644
--- a/cc/layers/scrollbar_layer.cc
+++ b/cc/layers/scrollbar_layer.cc
@@ -270,7 +270,8 @@ void ScrollbarLayer::CreateUpdaterIfNeeded() {
             scrollbar_.get(),
             painter_.get(),
             geometry_.get(),
-            WebKit::WebScrollbar::BackTrackPart).PassAs<LayerPainter>());
+            WebKit::WebScrollbar::BackTrackPart).PassAs<LayerPainter>(),
+        rendering_stats_instrumentation());
   }
   if (!back_track_) {
     back_track_ = back_track_updater_->CreateResource(
@@ -286,7 +287,8 @@ void ScrollbarLayer::CreateUpdaterIfNeeded() {
               scrollbar_.get(),
               painter_.get(),
               geometry_.get(),
-              WebKit::WebScrollbar::ForwardTrackPart).PassAs<LayerPainter>());
+              WebKit::WebScrollbar::ForwardTrackPart).PassAs<LayerPainter>(),
+          rendering_stats_instrumentation());
     }
     if (!fore_track_) {
       fore_track_ = fore_track_updater_->CreateResource(
@@ -298,7 +300,8 @@ void ScrollbarLayer::CreateUpdaterIfNeeded() {
     thumb_updater_ = CachingBitmapContentLayerUpdater::Create(
         ScrollbarThumbPainter::Create(scrollbar_.get(),
                                       painter_.get(),
-                                      geometry_.get()).PassAs<LayerPainter>());
+                                      geometry_.get()).PassAs<LayerPainter>(),
+        rendering_stats_instrumentation());
   }
   if (!thumb_) {
     thumb_ = thumb_updater_->CreateResource(
@@ -309,8 +312,7 @@ void ScrollbarLayer::CreateUpdaterIfNeeded() {
 void ScrollbarLayer::UpdatePart(CachingBitmapContentLayerUpdater* painter,
                                 LayerUpdater::Resource* resource,
                                 gfx::Rect rect,
-                                ResourceUpdateQueue* queue,
-                                RenderingStats* stats) {
+                                ResourceUpdateQueue* queue) {
   if (layer_tree_host()->settings().solid_color_scrollbars)
     return;
 
@@ -332,8 +334,7 @@ void ScrollbarLayer::UpdatePart(CachingBitmapContentLayerUpdater* painter,
                            rect.size(),
                            contents_scale_x(),
                            contents_scale_y(),
-                           &painted_opaque_rect,
-                           stats);
+                           &painted_opaque_rect);
   if (!painter->pixels_did_change() &&
       resource->texture()->have_backing_texture()) {
     TRACE_EVENT_INSTANT0("cc",
@@ -348,7 +349,7 @@ void ScrollbarLayer::UpdatePart(CachingBitmapContentLayerUpdater* painter,
     resource->texture()->ReturnBackingTexture();
 
   gfx::Vector2d dest_offset(0, 0);
-  resource->Update(queue, rect, dest_offset, partial_updates_allowed, stats);
+  resource->Update(queue, rect, dest_offset, partial_updates_allowed);
 }
 
 gfx::Rect ScrollbarLayer::ScrollbarLayerRectToContentRect(
@@ -395,9 +396,8 @@ void ScrollbarLayer::SetTexturePriorities(
 }
 
 void ScrollbarLayer::Update(ResourceUpdateQueue* queue,
-                            const OcclusionTracker* occlusion,
-                            RenderingStats* stats) {
-  ContentsScalingLayer::Update(queue, occlusion, stats);
+                            const OcclusionTracker* occlusion) {
+  ContentsScalingLayer::Update(queue, occlusion);
 
   dirty_rect_.Union(update_rect_);
   if (content_bounds().IsEmpty())
@@ -412,14 +412,12 @@ void ScrollbarLayer::Update(ResourceUpdateQueue* queue,
   UpdatePart(back_track_updater_.get(),
              back_track_.get(),
              content_rect,
-             queue,
-             stats);
+             queue);
   if (fore_track_ && fore_track_updater_) {
     UpdatePart(fore_track_updater_.get(),
                fore_track_.get(),
                content_rect,
-               queue,
-               stats);
+               queue);
   }
 
   // Consider the thumb to be at the origin when painting.
@@ -431,8 +429,7 @@ void ScrollbarLayer::Update(ResourceUpdateQueue* queue,
     UpdatePart(thumb_updater_.get(),
                thumb_.get(),
                origin_thumb_rect,
-               queue,
-               stats);
+               queue);
   }
 
   dirty_rect_ = gfx::RectF();
diff --git a/cc/layers/scrollbar_layer.h b/cc/layers/scrollbar_layer.h
index df95ed5..5af05cf 100644
--- a/cc/layers/scrollbar_layer.h
+++ b/cc/layers/scrollbar_layer.h
@@ -40,8 +40,7 @@ class CC_EXPORT ScrollbarLayer : public ContentsScalingLayer {
   virtual void SetTexturePriorities(const PriorityCalculator& priority_calc)
       OVERRIDE;
   virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion,
-                      RenderingStats* stats) OVERRIDE;
+                      const OcclusionTracker* occlusion) OVERRIDE;
   virtual void SetLayerTreeHost(LayerTreeHost* host) OVERRIDE;
   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
   virtual void CalculateContentsScale(float ideal_contents_scale,
@@ -64,8 +63,7 @@ class CC_EXPORT ScrollbarLayer : public ContentsScalingLayer {
   void UpdatePart(CachingBitmapContentLayerUpdater* painter,
                   LayerUpdater::Resource* resource,
                   gfx::Rect rect,
-                  ResourceUpdateQueue* queue,
-                  RenderingStats* stats);
+                  ResourceUpdateQueue* queue);
   void CreateUpdaterIfNeeded();
   gfx::Rect ScrollbarLayerRectToContentRect(gfx::Rect layer_rect) const;
 
diff --git a/cc/layers/scrollbar_layer_unittest.cc b/cc/layers/scrollbar_layer_unittest.cc
index 779abf1..1258a8c 100644
--- a/cc/layers/scrollbar_layer_unittest.cc
+++ b/cc/layers/scrollbar_layer_unittest.cc
@@ -392,7 +392,7 @@ class ScrollbarLayerTestResourceCreation : public testing::Test {
 
     scrollbar_layer->SetTexturePriorities(calculator);
     layer_tree_host_->contents_texture_manager()->PrioritizeTextures();
-    scrollbar_layer->Update(&queue, &occlusion_tracker, NULL);
+    scrollbar_layer->Update(&queue, &occlusion_tracker);
     EXPECT_EQ(0, queue.FullUploadSize());
     EXPECT_EQ(expected_resources, queue.PartialUploadSize());
 
diff --git a/cc/layers/texture_layer.cc b/cc/layers/texture_layer.cc
index acabc87..4d63f72 100644
--- a/cc/layers/texture_layer.cc
+++ b/cc/layers/texture_layer.cc
@@ -155,8 +155,7 @@ bool TextureLayer::DrawsContent() const {
 }
 
 void TextureLayer::Update(ResourceUpdateQueue* queue,
-                          const OcclusionTracker* occlusion,
-                          RenderingStats* stats) {
+                          const OcclusionTracker* occlusion) {
   if (client_) {
     texture_id_ = client_->PrepareTexture(queue);
     context_lost_ =
diff --git a/cc/layers/texture_layer.h b/cc/layers/texture_layer.h
index 1e7b31b..28994f3 100644
--- a/cc/layers/texture_layer.h
+++ b/cc/layers/texture_layer.h
@@ -70,8 +70,7 @@ class CC_EXPORT TextureLayer : public Layer {
   virtual void SetLayerTreeHost(LayerTreeHost* layer_tree_host) OVERRIDE;
   virtual bool DrawsContent() const OVERRIDE;
   virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion,
-                      RenderingStats* stats) OVERRIDE;
+                      const OcclusionTracker* occlusion) OVERRIDE;
   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
   virtual bool BlocksPendingCommit() const OVERRIDE;
 
diff --git a/cc/layers/tiled_layer.cc b/cc/layers/tiled_layer.cc
index 99b44ce..7afb0d7 100644
--- a/cc/layers/tiled_layer.cc
+++ b/cc/layers/tiled_layer.cc
@@ -317,7 +317,6 @@ bool TiledLayer::UpdateTiles(int left,
                              int bottom,
                              ResourceUpdateQueue* queue,
                              const OcclusionTracker* occlusion,
-                             RenderingStats* stats,
                              bool* did_paint) {
   *did_paint = false;
   CreateUpdaterIfNeeded();
@@ -339,7 +338,7 @@ bool TiledLayer::UpdateTiles(int left,
 
   *did_paint = true;
   UpdateTileTextures(
-      paint_rect, left, top, right, bottom, queue, occlusion, stats);
+      paint_rect, left, top, right, bottom, queue, occlusion);
   return true;
 }
 
@@ -465,8 +464,7 @@ void TiledLayer::UpdateTileTextures(gfx::Rect paint_rect,
                                     int right,
                                     int bottom,
                                     ResourceUpdateQueue* queue,
-                                    const OcclusionTracker* occlusion,
-                                    RenderingStats* stats) {
+                                    const OcclusionTracker* occlusion) {
   // The update_rect should be in layer space. So we have to convert the
   // paint_rect from content space to layer space.
   float width_scale =
@@ -486,8 +484,7 @@ void TiledLayer::UpdateTileTextures(gfx::Rect paint_rect,
                              tiler_->tile_size(),
                              1.f / width_scale,
                              1.f / height_scale,
-                             &painted_opaque_rect,
-                             stats);
+                             &painted_opaque_rect);
 
   for (int j = top; j <= bottom; ++j) {
     for (int i = left; i <= right; ++i) {
@@ -552,7 +549,7 @@ void TiledLayer::UpdateTileTextures(gfx::Rect paint_rect,
       CHECK_LE(paint_offset.y() + source_rect.height(), paint_rect.height());
 
       tile->updater_resource()->Update(
-          queue, source_rect, dest_offset, tile->partial_update, stats);
+          queue, source_rect, dest_offset, tile->partial_update);
       if (occlusion) {
         occlusion->overdraw_metrics()->
             DidUpload(gfx::Transform(), source_rect, tile->opaque_rect());
@@ -719,14 +716,13 @@ void TiledLayer::UpdateScrollPrediction() {
 }
 
 void TiledLayer::Update(ResourceUpdateQueue* queue,
-                        const OcclusionTracker* occlusion,
-                        RenderingStats* stats) {
+                        const OcclusionTracker* occlusion) {
   DCHECK(!skips_draw_ && !failed_update_);  // Did ResetUpdateState get skipped?
   {
     base::AutoReset<bool> ignore_set_needs_commit(&ignore_set_needs_commit_,
                                                   true);
 
-    ContentsScalingLayer::Update(queue, occlusion, stats);
+    ContentsScalingLayer::Update(queue, occlusion);
     UpdateBounds();
   }
 
@@ -745,7 +741,7 @@ void TiledLayer::Update(ResourceUpdateQueue* queue,
                                      &top,
                                      &right,
                                      &bottom);
-    UpdateTiles(left, top, right, bottom, queue, NULL, stats, &did_paint);
+    UpdateTiles(left, top, right, bottom, queue, NULL, &did_paint);
     if (did_paint)
       return;
     // This was an attempt to paint the entire layer so if we fail it's okay,
@@ -763,7 +759,7 @@ void TiledLayer::Update(ResourceUpdateQueue* queue,
       predicted_visible_rect_, &left, &top, &right, &bottom);
   MarkOcclusionsAndRequestTextures(left, top, right, bottom, occlusion);
   skips_draw_ = !UpdateTiles(
-      left, top, right, bottom, queue, occlusion, stats, &did_paint);
+      left, top, right, bottom, queue, occlusion, &did_paint);
   if (skips_draw_)
     tiler_->reset();
   if (skips_draw_ || did_paint)
@@ -776,7 +772,7 @@ void TiledLayer::Update(ResourceUpdateQueue* queue,
     return;
 
   // Prepaint anything that was occluded but inside the layer's visible region.
-  if (!UpdateTiles(left, top, right, bottom, queue, NULL, stats, &did_paint) ||
+  if (!UpdateTiles(left, top, right, bottom, queue, NULL, &did_paint) ||
       did_paint)
     return;
 
@@ -806,7 +802,7 @@ void TiledLayer::Update(ResourceUpdateQueue* queue,
       while (bottom < prepaint_bottom) {
         ++bottom;
         if (!UpdateTiles(
-                left, bottom, right, bottom, queue, NULL, stats, &did_paint) ||
+                left, bottom, right, bottom, queue, NULL, &did_paint) ||
             did_paint)
           return;
       }
@@ -815,7 +811,7 @@ void TiledLayer::Update(ResourceUpdateQueue* queue,
       while (top > prepaint_top) {
         --top;
         if (!UpdateTiles(
-                left, top, right, top, queue, NULL, stats, &did_paint) ||
+                left, top, right, top, queue, NULL, &did_paint) ||
             did_paint)
           return;
       }
@@ -824,7 +820,7 @@ void TiledLayer::Update(ResourceUpdateQueue* queue,
       while (left > prepaint_left) {
         --left;
         if (!UpdateTiles(
-                left, top, left, bottom, queue, NULL, stats, &did_paint) ||
+                left, top, left, bottom, queue, NULL, &did_paint) ||
             did_paint)
           return;
       }
@@ -833,7 +829,7 @@ void TiledLayer::Update(ResourceUpdateQueue* queue,
       while (right < prepaint_right) {
         ++right;
         if (!UpdateTiles(
-                right, top, right, bottom, queue, NULL, stats, &did_paint) ||
+                right, top, right, bottom, queue, NULL, &did_paint) ||
             did_paint)
           return;
       }
diff --git a/cc/layers/tiled_layer.h b/cc/layers/tiled_layer.h
index e6112d0..a2d1ecb 100644
--- a/cc/layers/tiled_layer.h
+++ b/cc/layers/tiled_layer.h
@@ -34,8 +34,7 @@ class CC_EXPORT TiledLayer : public ContentsScalingLayer {
       OVERRIDE;
   virtual Region VisibleContentOpaqueRegion() const OVERRIDE;
   virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion,
-                      RenderingStats* stats) OVERRIDE;
+                      const OcclusionTracker* occlusion) OVERRIDE;
 
  protected:
   TiledLayer();
@@ -96,7 +95,6 @@ class CC_EXPORT TiledLayer : public ContentsScalingLayer {
                    int bottom,
                    ResourceUpdateQueue* queue,
                    const OcclusionTracker* occlusion,
-                   RenderingStats* stats,
                    bool* did_paint);
   bool HaveTexturesForTiles(int left,
                             int top,
@@ -114,8 +112,7 @@ class CC_EXPORT TiledLayer : public ContentsScalingLayer {
                           int right,
                           int bottom,
                           ResourceUpdateQueue* queue,
-                          const OcclusionTracker* occlusion,
-                          RenderingStats* stats);
+                          const OcclusionTracker* occlusion);
   void UpdateScrollPrediction();
 
   UpdatableTile* TileAt(int i, int j) const;
diff --git a/cc/layers/tiled_layer_unittest.cc b/cc/layers/tiled_layer_unittest.cc
index dd6c06e..42b22b0 100644
--- a/cc/layers/tiled_layer_unittest.cc
+++ b/cc/layers/tiled_layer_unittest.cc
@@ -17,6 +17,7 @@
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/fake_proxy.h"
+#include "cc/test/fake_rendering_stats_instrumentation.h"
 #include "cc/test/geometry_test_utils.h"
 #include "cc/test/tiled_layer_test_common.h"
 #include "cc/trees/single_thread_proxy.h"
@@ -112,7 +113,7 @@ class TiledLayerTest : public testing::Test {
 
   void LayerUpdate(FakeTiledLayer* layer, TestOcclusionTracker* occluded) {
     DebugScopedSetMainThread main_thread(proxy_);
-    layer->Update(queue_.get(), occluded, NULL);
+    layer->Update(queue_.get(), occluded);
   }
 
   void CalcDrawProps(const scoped_refptr<FakeTiledLayer>& layer1) {
@@ -161,9 +162,9 @@ class TiledLayerTest : public testing::Test {
 
     // Update content
     if (layer1)
-      layer1->Update(queue_.get(), occlusion_, NULL);
+      layer1->Update(queue_.get(), occlusion_);
     if (layer2)
-      layer2->Update(queue_.get(), occlusion_, NULL);
+      layer2->Update(queue_.get(), occlusion_);
 
     bool needs_update = false;
     if (layer1)
@@ -605,7 +606,7 @@ TEST_F(TiledLayerTest, PaintSmallAnimatedLayersImmediately) {
     // if it is close to the viewport size and has the available memory.
     layer->SetTexturePriorities(priority_calculator_);
     resource_manager_->PrioritizeTextures();
-    layer->Update(queue_.get(), 0, NULL);
+    layer->Update(queue_.get(), NULL);
     UpdateTextures();
     LayerPushPropertiesTo(layer.get(), layer_impl.get());
 
@@ -772,7 +773,7 @@ TEST_F(TiledLayerTest, VerifyUpdateRectWhenContentBoundsAreScaled) {
 
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
   EXPECT_FLOAT_RECT_EQ(gfx::RectF(0, 0, 300, 300 * 0.8), layer->update_rect());
   UpdateTextures();
 
@@ -781,7 +782,7 @@ TEST_F(TiledLayerTest, VerifyUpdateRectWhenContentBoundsAreScaled) {
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
   layer->InvalidateContentRect(content_bounds);
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
   EXPECT_FLOAT_RECT_EQ(gfx::RectF(layer_bounds), layer->update_rect());
   UpdateTextures();
 
@@ -791,7 +792,7 @@ TEST_F(TiledLayerTest, VerifyUpdateRectWhenContentBoundsAreScaled) {
   layer->InvalidateContentRect(partial_damage);
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
   EXPECT_FLOAT_RECT_EQ(gfx::RectF(45, 80, 15, 8), layer->update_rect());
 }
 
@@ -811,7 +812,7 @@ TEST_F(TiledLayerTest, VerifyInvalidationWhenContentsScaleChanges) {
   // Push the tiles to the impl side and check that there is exactly one.
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
   UpdateTextures();
   LayerPushPropertiesTo(layer.get(), layer_impl.get());
   EXPECT_TRUE(layer_impl->HasResourceIdForTileAt(0, 0));
@@ -829,7 +830,7 @@ TEST_F(TiledLayerTest, VerifyInvalidationWhenContentsScaleChanges) {
   // The impl side should get 2x2 tiles now.
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
   UpdateTextures();
   LayerPushPropertiesTo(layer.get(), layer_impl.get());
   EXPECT_TRUE(layer_impl->HasResourceIdForTileAt(0, 0));
@@ -910,7 +911,7 @@ TEST_F(TiledLayerTest, ResizeToSmaller) {
 
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
 
   layer->SetBounds(gfx::Size(200, 200));
   layer->InvalidateContentRect(gfx::Rect(0, 0, 200, 200));
@@ -928,7 +929,7 @@ TEST_F(TiledLayerTest, HugeLayerUpdateCrash) {
   // Ensure no crash for bounds where size * size would overflow an int.
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
 }
 
 class TiledLayerPartialUpdateTest : public TiledLayerTest {
@@ -1059,7 +1060,7 @@ TEST_F(TiledLayerTest, TilesPaintedWithoutOcclusion) {
 
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
   EXPECT_EQ(2, layer->fake_layer_updater()->update_count());
 }
 
@@ -1084,7 +1085,7 @@ TEST_F(TiledLayerTest, TilesPaintedWithOcclusion) {
 
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   EXPECT_EQ(36 - 3, layer->fake_layer_updater()->update_count());
 
   EXPECT_NEAR(occluded.overdraw_metrics()->pixels_uploaded_opaque(), 0, 1);
@@ -1098,7 +1099,7 @@ TEST_F(TiledLayerTest, TilesPaintedWithOcclusion) {
 
   occluded.SetOcclusion(gfx::Rect(250, 200, 300, 100));
   layer->InvalidateContentRect(gfx::Rect(0, 0, 600, 600));
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   EXPECT_EQ(36 - 2, layer->fake_layer_updater()->update_count());
 
   EXPECT_NEAR(occluded.overdraw_metrics()->pixels_uploaded_opaque(), 0, 1);
@@ -1113,7 +1114,7 @@ TEST_F(TiledLayerTest, TilesPaintedWithOcclusion) {
 
   occluded.SetOcclusion(gfx::Rect(250, 250, 300, 100));
   layer->InvalidateContentRect(gfx::Rect(0, 0, 600, 600));
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   EXPECT_EQ(36, layer->fake_layer_updater()->update_count());
 
   EXPECT_NEAR(occluded.overdraw_metrics()->pixels_uploaded_opaque(), 0, 1);
@@ -1144,7 +1145,7 @@ TEST_F(TiledLayerTest, TilesPaintedWithOcclusionAndVisiblityConstraints) {
 
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   EXPECT_EQ(24 - 3, layer->fake_layer_updater()->update_count());
 
   EXPECT_NEAR(occluded.overdraw_metrics()->pixels_uploaded_opaque(), 0, 1);
@@ -1162,7 +1163,7 @@ TEST_F(TiledLayerTest, TilesPaintedWithOcclusionAndVisiblityConstraints) {
   layer->InvalidateContentRect(gfx::Rect(0, 0, 600, 600));
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   EXPECT_EQ(24 - 6, layer->fake_layer_updater()->update_count());
 
   EXPECT_NEAR(occluded.overdraw_metrics()->pixels_uploaded_opaque(), 0, 1);
@@ -1181,7 +1182,7 @@ TEST_F(TiledLayerTest, TilesPaintedWithOcclusionAndVisiblityConstraints) {
   layer->InvalidateContentRect(gfx::Rect(0, 0, 600, 600));
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   EXPECT_EQ(24 - 6, layer->fake_layer_updater()->update_count());
 
   EXPECT_NEAR(occluded.overdraw_metrics()->pixels_uploaded_opaque(), 0, 1);
@@ -1209,7 +1210,7 @@ TEST_F(TiledLayerTest, TilesNotPaintedWithoutInvalidation) {
   layer->InvalidateContentRect(gfx::Rect(0, 0, 600, 600));
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   EXPECT_EQ(36 - 3, layer->fake_layer_updater()->update_count());
   { UpdateTextures(); }
 
@@ -1224,7 +1225,7 @@ TEST_F(TiledLayerTest, TilesNotPaintedWithoutInvalidation) {
 
   // Repaint without marking it dirty. The 3 culled tiles will be pre-painted
   // now.
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   EXPECT_EQ(3, layer->fake_layer_updater()->update_count());
 
   EXPECT_NEAR(occluded.overdraw_metrics()->pixels_uploaded_opaque(), 0, 1);
@@ -1259,7 +1260,7 @@ TEST_F(TiledLayerTest, TilesPaintedWithOcclusionAndTransforms) {
   layer->InvalidateContentRect(gfx::Rect(0, 0, 600, 600));
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   EXPECT_EQ(36 - 3, layer->fake_layer_updater()->update_count());
 
   EXPECT_NEAR(occluded.overdraw_metrics()->pixels_uploaded_opaque(), 0, 1);
@@ -1298,7 +1299,7 @@ TEST_F(TiledLayerTest, TilesPaintedWithOcclusionAndScaling) {
   layer->InvalidateContentRect(gfx::Rect(0, 0, 600, 600));
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   // The content is half the size of the layer (so the number of tiles is
   // fewer).  In this case, the content is 300x300, and since the tile size is
   // 100, the number of tiles 3x3.
@@ -1322,7 +1323,7 @@ TEST_F(TiledLayerTest, TilesPaintedWithOcclusionAndScaling) {
   layer->InvalidateContentRect(gfx::Rect(0, 0, 600, 600));
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   EXPECT_EQ(9 - 1, layer->fake_layer_updater()->update_count());
 
   EXPECT_NEAR(occluded.overdraw_metrics()->pixels_uploaded_opaque(), 0, 1);
@@ -1349,7 +1350,7 @@ TEST_F(TiledLayerTest, TilesPaintedWithOcclusionAndScaling) {
   layer->InvalidateContentRect(gfx::Rect(0, 0, 600, 600));
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   EXPECT_EQ(9 - 1, layer->fake_layer_updater()->update_count());
 
   EXPECT_NEAR(occluded.overdraw_metrics()->pixels_uploaded_opaque(), 0, 1);
@@ -1387,7 +1388,7 @@ TEST_F(TiledLayerTest, VisibleContentOpaqueRegion) {
   layer->InvalidateContentRect(content_bounds);
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   opaque_contents = layer->VisibleContentOpaqueRegion();
   EXPECT_TRUE(opaque_contents.IsEmpty());
 
@@ -1404,7 +1405,7 @@ TEST_F(TiledLayerTest, VisibleContentOpaqueRegion) {
   layer->InvalidateContentRect(content_bounds);
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   UpdateTextures();
   opaque_contents = layer->VisibleContentOpaqueRegion();
   EXPECT_EQ(gfx::IntersectRects(opaque_paint_rect, visible_bounds).ToString(),
@@ -1421,7 +1422,7 @@ TEST_F(TiledLayerTest, VisibleContentOpaqueRegion) {
   layer->fake_layer_updater()->SetOpaquePaintRect(gfx::Rect());
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   UpdateTextures();
   opaque_contents = layer->VisibleContentOpaqueRegion();
   EXPECT_EQ(gfx::IntersectRects(opaque_paint_rect, visible_bounds).ToString(),
@@ -1440,7 +1441,7 @@ TEST_F(TiledLayerTest, VisibleContentOpaqueRegion) {
   layer->InvalidateContentRect(gfx::Rect(0, 0, 1, 1));
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   UpdateTextures();
   opaque_contents = layer->VisibleContentOpaqueRegion();
   EXPECT_EQ(gfx::IntersectRects(opaque_paint_rect, visible_bounds).ToString(),
@@ -1459,7 +1460,7 @@ TEST_F(TiledLayerTest, VisibleContentOpaqueRegion) {
   layer->InvalidateContentRect(gfx::Rect(10, 10, 1, 1));
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   UpdateTextures();
   opaque_contents = layer->VisibleContentOpaqueRegion();
   EXPECT_EQ(gfx::IntersectRects(gfx::Rect(10, 100, 90, 100),
@@ -1498,7 +1499,7 @@ TEST_F(TiledLayerTest, Pixels_paintedMetrics) {
   layer->InvalidateContentRect(content_bounds);
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   UpdateTextures();
   opaque_contents = layer->VisibleContentOpaqueRegion();
   EXPECT_TRUE(opaque_contents.IsEmpty());
@@ -1517,7 +1518,7 @@ TEST_F(TiledLayerTest, Pixels_paintedMetrics) {
   layer->InvalidateContentRect(gfx::Rect(50, 200, 10, 10));
   layer->SetTexturePriorities(priority_calculator_);
   resource_manager_->PrioritizeTextures();
-  layer->Update(queue_.get(), &occluded, NULL);
+  layer->Update(queue_.get(), &occluded);
   UpdateTextures();
   opaque_contents = layer->VisibleContentOpaqueRegion();
   EXPECT_TRUE(opaque_contents.IsEmpty());
@@ -1719,7 +1720,8 @@ class UpdateTrackingTiledLayer : public FakeTiledLayer {
     scoped_ptr<TrackingLayerPainter> painter(TrackingLayerPainter::Create());
     tracking_layer_painter_ = painter.get();
     layer_updater_ =
-        BitmapContentLayerUpdater::Create(painter.PassAs<LayerPainter>());
+        BitmapContentLayerUpdater::Create(painter.PassAs<LayerPainter>(),
+                                          &stats_instrumentation_);
   }
 
   TrackingLayerPainter* tracking_layer_painter() const {
@@ -1734,6 +1736,7 @@ class UpdateTrackingTiledLayer : public FakeTiledLayer {
 
   TrackingLayerPainter* tracking_layer_painter_;
   scoped_refptr<BitmapContentLayerUpdater> layer_updater_;
+  FakeRenderingStatsInstrumentation stats_instrumentation_;
 };
 
 TEST_F(TiledLayerTest, NonIntegerContentsScaleIsNotDistortedDuringPaint) {
@@ -1754,7 +1757,7 @@ TEST_F(TiledLayerTest, NonIntegerContentsScaleIsNotDistortedDuringPaint) {
   resource_manager_->PrioritizeTextures();
 
   // Update the whole tile.
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
   layer->tracking_layer_painter()->ResetPaintedRect();
 
   EXPECT_RECT_EQ(gfx::Rect(), layer->tracking_layer_painter()->PaintedRect());
@@ -1763,7 +1766,7 @@ TEST_F(TiledLayerTest, NonIntegerContentsScaleIsNotDistortedDuringPaint) {
   // Invalidate the entire layer in content space. When painting, the rect given
   // to webkit should match the layer's bounds.
   layer->InvalidateContentRect(content_rect);
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
 
   EXPECT_RECT_EQ(layer_rect, layer->tracking_layer_painter()->PaintedRect());
 }
@@ -1786,7 +1789,7 @@ TEST_F(TiledLayerTest,
   resource_manager_->PrioritizeTextures();
 
   // Update the whole tile.
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
   layer->tracking_layer_painter()->ResetPaintedRect();
 
   EXPECT_RECT_EQ(gfx::Rect(), layer->tracking_layer_painter()->PaintedRect());
@@ -1795,7 +1798,7 @@ TEST_F(TiledLayerTest,
   // Invalidate the entire layer in layer space. When painting, the rect given
   // to webkit should match the layer's bounds.
   layer->SetNeedsDisplayRect(layer_rect);
-  layer->Update(queue_.get(), 0, NULL);
+  layer->Update(queue_.get(), NULL);
 
   EXPECT_RECT_EQ(layer_rect, layer->tracking_layer_painter()->PaintedRect());
 }
diff --git a/cc/resources/bitmap_content_layer_updater.cc b/cc/resources/bitmap_content_layer_updater.cc
index 5365c4c..93f5807 100644
--- a/cc/resources/bitmap_content_layer_updater.cc
+++ b/cc/resources/bitmap_content_layer_updater.cc
@@ -4,7 +4,7 @@
 
 #include "cc/resources/bitmap_content_layer_updater.h"
 
-#include "cc/debug/rendering_stats.h"
+#include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/resources/layer_painter.h"
 #include "cc/resources/prioritized_resource.h"
 #include "cc/resources/resource_update.h"
@@ -23,20 +23,23 @@ BitmapContentLayerUpdater::Resource::~Resource() {}
 void BitmapContentLayerUpdater::Resource::Update(ResourceUpdateQueue* queue,
                                                  gfx::Rect source_rect,
                                                  gfx::Vector2d dest_offset,
-                                                 bool partial_update,
-                                                 RenderingStats* stats) {
+                                                 bool partial_update) {
   updater_->UpdateTexture(
       queue, texture(), source_rect, dest_offset, partial_update);
 }
 
 scoped_refptr<BitmapContentLayerUpdater> BitmapContentLayerUpdater::Create(
-    scoped_ptr<LayerPainter> painter) {
-  return make_scoped_refptr(new BitmapContentLayerUpdater(painter.Pass()));
+    scoped_ptr<LayerPainter> painter,
+    RenderingStatsInstrumentation* stats_instrumentation) {
+  return make_scoped_refptr(
+      new BitmapContentLayerUpdater(painter.Pass(), stats_instrumentation));
 }
 
 BitmapContentLayerUpdater::BitmapContentLayerUpdater(
-    scoped_ptr<LayerPainter> painter)
-    : ContentLayerUpdater(painter.Pass()), opaque_(false) {}
+    scoped_ptr<LayerPainter> painter,
+    RenderingStatsInstrumentation* stats_instrumentation)
+    : ContentLayerUpdater(painter.Pass(), stats_instrumentation),
+      opaque_(false) {}
 
 BitmapContentLayerUpdater::~BitmapContentLayerUpdater() {}
 
@@ -51,25 +54,24 @@ void BitmapContentLayerUpdater::PrepareToUpdate(
     gfx::Size tile_size,
     float contents_width_scale,
     float contents_height_scale,
-    gfx::Rect* resulting_opaque_rect,
-    RenderingStats* stats) {
+    gfx::Rect* resulting_opaque_rect) {
   if (canvas_size_ != content_rect.size()) {
     canvas_size_ = content_rect.size();
     canvas_ = make_scoped_ptr(skia::CreateBitmapCanvas(
         canvas_size_.width(), canvas_size_.height(), opaque_));
   }
 
-  if (stats) {
-    stats->total_pixels_rasterized +=
-        content_rect.width() * content_rect.height();
-  }
+  // TODO: Clarify if this needs to be saved here. crbug.com/223693
+  rendering_stats_instrumentation_->AddRaster(
+      base::TimeDelta(),
+      content_rect.width() * content_rect.height(),
+      false);
 
   PaintContents(canvas_.get(),
                 content_rect,
                 contents_width_scale,
                 contents_height_scale,
-                resulting_opaque_rect,
-                stats);
+                resulting_opaque_rect);
 }
 
 void BitmapContentLayerUpdater::UpdateTexture(ResourceUpdateQueue* queue,
diff --git a/cc/resources/bitmap_content_layer_updater.h b/cc/resources/bitmap_content_layer_updater.h
index 0597f82..9f62204 100644
--- a/cc/resources/bitmap_content_layer_updater.h
+++ b/cc/resources/bitmap_content_layer_updater.h
@@ -13,6 +13,7 @@ class SkCanvas;
 namespace cc {
 
 class LayerPainter;
+class RenderingStatsInstrumenation;
 
 // This class rasterizes the content_rect into a skia bitmap canvas. It then
 // updates textures by copying from the canvas into the texture, using
@@ -28,8 +29,7 @@ class CC_EXPORT BitmapContentLayerUpdater : public ContentLayerUpdater {
     virtual void Update(ResourceUpdateQueue* queue,
                         gfx::Rect source_rect,
                         gfx::Vector2d dest_offset,
-                        bool partial_update,
-                        RenderingStats* stats) OVERRIDE;
+                        bool partial_update) OVERRIDE;
 
    private:
     BitmapContentLayerUpdater* updater_;
@@ -38,7 +38,8 @@ class CC_EXPORT BitmapContentLayerUpdater : public ContentLayerUpdater {
   };
 
   static scoped_refptr<BitmapContentLayerUpdater> Create(
-      scoped_ptr<LayerPainter> painter);
+      scoped_ptr<LayerPainter> painter,
+      RenderingStatsInstrumentation* stats_instrumenation);
 
   virtual scoped_ptr<LayerUpdater::Resource> CreateResource(
       PrioritizedResourceManager* manager) OVERRIDE;
@@ -46,8 +47,7 @@ class CC_EXPORT BitmapContentLayerUpdater : public ContentLayerUpdater {
                                gfx::Size tile_size,
                                float contents_width_scale,
                                float contents_height_scale,
-                               gfx::Rect* resulting_opaque_rect,
-                               RenderingStats* stats) OVERRIDE;
+                               gfx::Rect* resulting_opaque_rect) OVERRIDE;
   void UpdateTexture(ResourceUpdateQueue* queue,
                      PrioritizedResource* resource,
                      gfx::Rect source_rect,
@@ -57,7 +57,9 @@ class CC_EXPORT BitmapContentLayerUpdater : public ContentLayerUpdater {
   virtual void SetOpaque(bool opaque) OVERRIDE;
 
  protected:
-  explicit BitmapContentLayerUpdater(scoped_ptr<LayerPainter> painter);
+  BitmapContentLayerUpdater(
+      scoped_ptr<LayerPainter> painter,
+      RenderingStatsInstrumentation* stats_instrumenation);
   virtual ~BitmapContentLayerUpdater();
 
   scoped_ptr<SkCanvas> canvas_;
diff --git a/cc/resources/bitmap_skpicture_content_layer_updater.cc b/cc/resources/bitmap_skpicture_content_layer_updater.cc
index e721891..455d7c9 100644
--- a/cc/resources/bitmap_skpicture_content_layer_updater.cc
+++ b/cc/resources/bitmap_skpicture_content_layer_updater.cc
@@ -5,7 +5,7 @@
 #include "cc/resources/bitmap_skpicture_content_layer_updater.h"
 
 #include "base/time.h"
-#include "cc/debug/rendering_stats.h"
+#include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/resources/layer_painter.h"
 #include "cc/resources/prioritized_resource.h"
 #include "cc/resources/resource_update_queue.h"
@@ -23,20 +23,15 @@ void BitmapSkPictureContentLayerUpdater::Resource::Update(
     ResourceUpdateQueue* queue,
     gfx::Rect source_rect,
     gfx::Vector2d dest_offset,
-    bool partial_update,
-    RenderingStats* stats) {
+    bool partial_update) {
   bitmap_.setConfig(
       SkBitmap::kARGB_8888_Config, source_rect.width(), source_rect.height());
   bitmap_.allocPixels();
   bitmap_.setIsOpaque(updater_->layer_is_opaque());
   SkDevice device(bitmap_);
   SkCanvas canvas(&device);
-  base::TimeTicks paint_begin_time;
-  if (stats)
-    paint_begin_time = base::TimeTicks::Now();
-  updater_->PaintContentsRect(&canvas, source_rect, stats);
-  if (stats)
-    stats->total_paint_time += base::TimeTicks::Now() - paint_begin_time;
+
+  updater_->PaintContentsRect(&canvas, source_rect);
 
   ResourceUpdate upload = ResourceUpdate::Create(
       texture(), &bitmap_, source_rect, source_rect, dest_offset);
@@ -47,14 +42,18 @@ void BitmapSkPictureContentLayerUpdater::Resource::Update(
 }
 
 scoped_refptr<BitmapSkPictureContentLayerUpdater>
-BitmapSkPictureContentLayerUpdater::Create(scoped_ptr<LayerPainter> painter) {
+BitmapSkPictureContentLayerUpdater::Create(
+    scoped_ptr<LayerPainter> painter,
+    RenderingStatsInstrumentation* stats_instrumentation) {
   return make_scoped_refptr(
-      new BitmapSkPictureContentLayerUpdater(painter.Pass()));
+      new BitmapSkPictureContentLayerUpdater(painter.Pass(),
+                                             stats_instrumentation));
 }
 
 BitmapSkPictureContentLayerUpdater::BitmapSkPictureContentLayerUpdater(
-    scoped_ptr<LayerPainter> painter)
-    : SkPictureContentLayerUpdater(painter.Pass()) {}
+    scoped_ptr<LayerPainter> painter,
+    RenderingStatsInstrumentation* stats_instrumentation)
+    : SkPictureContentLayerUpdater(painter.Pass(), stats_instrumentation) {}
 
 BitmapSkPictureContentLayerUpdater::~BitmapSkPictureContentLayerUpdater() {}
 
@@ -67,21 +66,25 @@ BitmapSkPictureContentLayerUpdater::CreateResource(
 
 void BitmapSkPictureContentLayerUpdater::PaintContentsRect(
     SkCanvas* canvas,
-    gfx::Rect source_rect,
-    RenderingStats* stats) {
+    gfx::Rect source_rect) {
   // Translate the origin of content_rect to that of source_rect.
   canvas->translate(content_rect().x() - source_rect.x(),
                     content_rect().y() - source_rect.y());
-  base::TimeTicks rasterize_begin_time;
-  if (stats)
-    rasterize_begin_time = base::TimeTicks::Now();
+
+  base::TimeTicks start_time =
+      rendering_stats_instrumentation_->StartRecording();
+
   DrawPicture(canvas);
-  if (stats) {
-    stats->total_rasterize_time +=
-        base::TimeTicks::Now() - rasterize_begin_time;
-    stats->total_pixels_rasterized +=
-        source_rect.width() * source_rect.height();
-  }
+
+  base::TimeDelta duration =
+      rendering_stats_instrumentation_->EndRecording(start_time);
+  rendering_stats_instrumentation_->AddRaster(
+      duration,
+      source_rect.width() * source_rect.height(),
+      false);
+
+  // TODO: Clarify if this needs to be saved here. crbug.com/223693
+  rendering_stats_instrumentation_->AddPaint(duration, 0);
 }
 
 }  // namespace cc
diff --git a/cc/resources/bitmap_skpicture_content_layer_updater.h b/cc/resources/bitmap_skpicture_content_layer_updater.h
index 63ca4a1..19458c1 100644
--- a/cc/resources/bitmap_skpicture_content_layer_updater.h
+++ b/cc/resources/bitmap_skpicture_content_layer_updater.h
@@ -23,8 +23,7 @@ class BitmapSkPictureContentLayerUpdater : public SkPictureContentLayerUpdater {
     virtual void Update(ResourceUpdateQueue* queue,
                         gfx::Rect source_rect,
                         gfx::Vector2d dest_offset,
-                        bool partial_update,
-                        RenderingStats* stats) OVERRIDE;
+                        bool partial_update) OVERRIDE;
 
    private:
     SkBitmap bitmap_;
@@ -34,16 +33,18 @@ class BitmapSkPictureContentLayerUpdater : public SkPictureContentLayerUpdater {
   };
 
   static scoped_refptr<BitmapSkPictureContentLayerUpdater> Create(
-      scoped_ptr<LayerPainter> painter);
+      scoped_ptr<LayerPainter> painter,
+      RenderingStatsInstrumentation* stats_instrumentation);
 
   virtual scoped_ptr<LayerUpdater::Resource> CreateResource(
       PrioritizedResourceManager* manager) OVERRIDE;
   void PaintContentsRect(SkCanvas* canvas,
-                         gfx::Rect source_rect,
-                         RenderingStats* stats);
+                         gfx::Rect source_rect);
 
  private:
-  explicit BitmapSkPictureContentLayerUpdater(scoped_ptr<LayerPainter> painter);
+  BitmapSkPictureContentLayerUpdater(
+      scoped_ptr<LayerPainter> painter,
+      RenderingStatsInstrumentation* stats_instrumentation);
   virtual ~BitmapSkPictureContentLayerUpdater();
 
   DISALLOW_COPY_AND_ASSIGN(BitmapSkPictureContentLayerUpdater);
diff --git a/cc/resources/caching_bitmap_content_layer_updater.cc b/cc/resources/caching_bitmap_content_layer_updater.cc
index 78f6097..252388e 100644
--- a/cc/resources/caching_bitmap_content_layer_updater.cc
+++ b/cc/resources/caching_bitmap_content_layer_updater.cc
@@ -11,14 +11,19 @@
 namespace cc {
 
 scoped_refptr<CachingBitmapContentLayerUpdater>
-CachingBitmapContentLayerUpdater::Create(scoped_ptr<LayerPainter> painter) {
+CachingBitmapContentLayerUpdater::Create(
+    scoped_ptr<LayerPainter> painter,
+    RenderingStatsInstrumentation* stats_instrumentation) {
   return make_scoped_refptr(
-      new CachingBitmapContentLayerUpdater(painter.Pass()));
+      new CachingBitmapContentLayerUpdater(painter.Pass(),
+                                           stats_instrumentation));
 }
 
 CachingBitmapContentLayerUpdater::CachingBitmapContentLayerUpdater(
-    scoped_ptr<LayerPainter> painter)
-    : BitmapContentLayerUpdater(painter.Pass()), pixels_did_change_(false) {}
+    scoped_ptr<LayerPainter> painter,
+    RenderingStatsInstrumentation* stats_instrumentation)
+    : BitmapContentLayerUpdater(painter.Pass(), stats_instrumentation),
+      pixels_did_change_(false) {}
 
 CachingBitmapContentLayerUpdater::~CachingBitmapContentLayerUpdater() {}
 
@@ -27,14 +32,12 @@ void CachingBitmapContentLayerUpdater::PrepareToUpdate(
     gfx::Size tile_size,
     float contents_width_scale,
     float contents_height_scale,
-    gfx::Rect* resulting_opaque_rect,
-    RenderingStats* stats) {
+    gfx::Rect* resulting_opaque_rect) {
   BitmapContentLayerUpdater::PrepareToUpdate(content_rect,
                                              tile_size,
                                              contents_width_scale,
                                              contents_height_scale,
-                                             resulting_opaque_rect,
-                                             stats);
+                                             resulting_opaque_rect);
 
   const SkBitmap& new_bitmap = canvas_->getDevice()->accessBitmap(false);
   SkAutoLockPixels lock(new_bitmap);
diff --git a/cc/resources/caching_bitmap_content_layer_updater.h b/cc/resources/caching_bitmap_content_layer_updater.h
index 420d6d5..e77ce0c 100644
--- a/cc/resources/caching_bitmap_content_layer_updater.h
+++ b/cc/resources/caching_bitmap_content_layer_updater.h
@@ -14,21 +14,23 @@ namespace cc {
 class CachingBitmapContentLayerUpdater : public BitmapContentLayerUpdater {
  public:
   static scoped_refptr<CachingBitmapContentLayerUpdater> Create(
-      scoped_ptr<LayerPainter>);
+      scoped_ptr<LayerPainter>,
+      RenderingStatsInstrumentation* stats_instrumentation);
 
   virtual void PrepareToUpdate(gfx::Rect content_rect,
                                gfx::Size tile_size,
                                float contents_width_scale,
                                float contents_height_scale,
-                               gfx::Rect* resulting_opaque_rect,
-                               RenderingStats* stats) OVERRIDE;
+                               gfx::Rect* resulting_opaque_rect) OVERRIDE;
 
   bool pixels_did_change() const {
     return pixels_did_change_;
   }
 
  private:
-  explicit CachingBitmapContentLayerUpdater(scoped_ptr<LayerPainter> painter);
+  CachingBitmapContentLayerUpdater(
+      scoped_ptr<LayerPainter> painter,
+      RenderingStatsInstrumentation* stats_instrumentation);
   virtual ~CachingBitmapContentLayerUpdater();
 
   bool pixels_did_change_;
diff --git a/cc/resources/content_layer_updater.cc b/cc/resources/content_layer_updater.cc
index f11083b..a1d9fdf 100644
--- a/cc/resources/content_layer_updater.cc
+++ b/cc/resources/content_layer_updater.cc
@@ -6,7 +6,7 @@
 
 #include "base/debug/trace_event.h"
 #include "base/time.h"
-#include "cc/debug/rendering_stats.h"
+#include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/resources/layer_painter.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkPaint.h"
@@ -17,8 +17,11 @@
 
 namespace cc {
 
-ContentLayerUpdater::ContentLayerUpdater(scoped_ptr<LayerPainter> painter)
-    : painter_(painter.Pass()) {}
+ContentLayerUpdater::ContentLayerUpdater(
+    scoped_ptr<LayerPainter> painter,
+    RenderingStatsInstrumentation* stats_instrumentation)
+    : painter_(painter.Pass()),
+      rendering_stats_instrumentation_(stats_instrumentation) {}
 
 ContentLayerUpdater::~ContentLayerUpdater() {}
 
@@ -26,8 +29,7 @@ void ContentLayerUpdater::PaintContents(SkCanvas* canvas,
                                         gfx::Rect content_rect,
                                         float contents_width_scale,
                                         float contents_height_scale,
-                                        gfx::Rect* resulting_opaque_rect,
-                                        RenderingStats* stats) {
+                                        gfx::Rect* resulting_opaque_rect) {
   TRACE_EVENT0("cc", "ContentLayerUpdater::PaintContents");
   canvas->save();
   canvas->translate(SkFloatToScalar(-content_rect.x()),
@@ -53,14 +55,18 @@ void ContentLayerUpdater::PaintContents(SkCanvas* canvas,
   canvas->clipRect(layer_sk_rect);
 
   gfx::RectF opaque_layer_rect;
-  base::TimeTicks paint_begin_time;
-  if (stats)
-    paint_begin_time = base::TimeTicks::Now();
+
+  base::TimeTicks start_time =
+      rendering_stats_instrumentation_->StartRecording();
+
   painter_->Paint(canvas, layer_rect, &opaque_layer_rect);
-  if (stats) {
-    stats->total_paint_time += base::TimeTicks::Now() - paint_begin_time;
-    stats->total_pixels_painted += content_rect.width() * content_rect.height();
-  }
+
+  base::TimeDelta duration =
+      rendering_stats_instrumentation_->EndRecording(start_time);
+  rendering_stats_instrumentation_->AddPaint(
+      duration,
+      content_rect.width() * content_rect.height());
+
   canvas->restore();
 
   gfx::RectF opaque_content_rect = gfx::ScaleRect(
diff --git a/cc/resources/content_layer_updater.h b/cc/resources/content_layer_updater.h
index 80b8a48..ca1f6e4 100644
--- a/cc/resources/content_layer_updater.h
+++ b/cc/resources/content_layer_updater.h
@@ -14,23 +14,26 @@ class SkCanvas;
 namespace cc {
 
 class LayerPainter;
+class RenderingStatsInstrumentation;
 
 // Base class for BitmapContentLayerUpdater and
 // SkPictureContentLayerUpdater that reduces code duplication between
 // their respective PaintContents implementations.
 class CC_EXPORT ContentLayerUpdater : public LayerUpdater {
  protected:
-  explicit ContentLayerUpdater(scoped_ptr<LayerPainter> painter);
+  ContentLayerUpdater(scoped_ptr<LayerPainter> painter,
+                      RenderingStatsInstrumentation* stats_instrumentation);
   virtual ~ContentLayerUpdater();
 
   void PaintContents(SkCanvas* canvas,
                      gfx::Rect content_rect,
                      float contents_width_scale,
                      float contents_height_scale,
-                     gfx::Rect* resulting_opaque_rect,
-                     RenderingStats* stats);
+                     gfx::Rect* resulting_opaque_rect);
   gfx::Rect content_rect() const { return content_rect_; }
 
+  RenderingStatsInstrumentation* rendering_stats_instrumentation_;
+
  private:
   gfx::Rect content_rect_;
   scoped_ptr<LayerPainter> painter_;
diff --git a/cc/resources/image_layer_updater.cc b/cc/resources/image_layer_updater.cc
index 378490d..6e9cdfea 100644
--- a/cc/resources/image_layer_updater.cc
+++ b/cc/resources/image_layer_updater.cc
@@ -17,8 +17,7 @@ ImageLayerUpdater::Resource::~Resource() {}
 void ImageLayerUpdater::Resource::Update(ResourceUpdateQueue* queue,
                                          gfx::Rect source_rect,
                                          gfx::Vector2d dest_offset,
-                                         bool partial_update,
-                                         RenderingStats*) {
+                                         bool partial_update) {
   updater_->UpdateTexture(
       queue, texture(), source_rect, dest_offset, partial_update);
 }
diff --git a/cc/resources/image_layer_updater.h b/cc/resources/image_layer_updater.h
index f9fca00..6a47643 100644
--- a/cc/resources/image_layer_updater.h
+++ b/cc/resources/image_layer_updater.h
@@ -23,8 +23,7 @@ class ImageLayerUpdater : public LayerUpdater {
     virtual void Update(ResourceUpdateQueue* queue,
                         gfx::Rect source_rect,
                         gfx::Vector2d dest_offset,
-                        bool partial_update,
-                        RenderingStats* stats) OVERRIDE;
+                        bool partial_update) OVERRIDE;
 
    private:
     ImageLayerUpdater* updater_;
diff --git a/cc/resources/layer_updater.h b/cc/resources/layer_updater.h
index a8b7657..13359ff 100644
--- a/cc/resources/layer_updater.h
+++ b/cc/resources/layer_updater.h
@@ -17,7 +17,6 @@ class PrioritizedResource;
 class PrioritizedResourceManager;
 class ResourceUpdateQueue;
 class TextureManager;
-struct RenderingStats;
 
 class CC_EXPORT LayerUpdater : public base::RefCounted<LayerUpdater> {
  public:
@@ -32,8 +31,7 @@ class CC_EXPORT LayerUpdater : public base::RefCounted<LayerUpdater> {
     virtual void Update(ResourceUpdateQueue* queue,
                         gfx::Rect source_rect,
                         gfx::Vector2d dest_offset,
-                        bool partial_update,
-                        RenderingStats* stats) = 0;
+                        bool partial_update) = 0;
    protected:
     explicit Resource(scoped_ptr<PrioritizedResource> texture);
 
@@ -54,8 +52,7 @@ class CC_EXPORT LayerUpdater : public base::RefCounted<LayerUpdater> {
                                gfx::Size tile_size,
                                float contents_width_scale,
                                float contents_height_scale,
-                               gfx::Rect* resulting_opaque_rect,
-                               RenderingStats* stats) {}
+                               gfx::Rect* resulting_opaque_rect) {}
 
   // Set true by the layer when it is known that the entire output is going to
   // be opaque.
diff --git a/cc/resources/picture.cc b/cc/resources/picture.cc
index d3ddc53..9ace4d4 100644
--- a/cc/resources/picture.cc
+++ b/cc/resources/picture.cc
@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 #include "base/debug/trace_event.h"
-#include "cc/debug/rendering_stats.h"
+#include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/layers/content_layer_client.h"
 #include "cc/resources/picture.h"
 #include "skia/ext/analysis_canvas.h"
@@ -79,7 +79,7 @@ void Picture::CloneForDrawing(int num_threads) {
 }
 
 void Picture::Record(ContentLayerClient* painter,
-                     RenderingStats* stats,
+                     RenderingStatsInstrumentation* stats_instrumentation,
                      const SkTileGridPicture::TileGridInfo& tile_grid_info) {
   TRACE_EVENT2("cc", "Picture::Record",
                "width", layer_rect_.width(), "height", layer_rect_.height());
@@ -111,15 +111,13 @@ void Picture::Record(ContentLayerClient* painter,
   canvas->drawRect(layer_skrect, paint);
 
   gfx::RectF opaque_layer_rect;
-  base::TimeTicks begin_paint_time;
-  if (stats)
-    begin_paint_time = base::TimeTicks::Now();
+  base::TimeTicks start_time = stats_instrumentation->StartRecording();
+
   painter->PaintContents(canvas, layer_rect_, &opaque_layer_rect);
-  if (stats) {
-    stats->total_paint_time += base::TimeTicks::Now() - begin_paint_time;
-    stats->total_pixels_painted +=
-        layer_rect_.width() * layer_rect_.height();
-  }
+
+  base::TimeDelta duration = stats_instrumentation->EndRecording(start_time);
+  stats_instrumentation->AddPaint(duration,
+                                  layer_rect_.width() * layer_rect_.height());
 
   canvas->restore();
   picture_->endRecording();
diff --git a/cc/resources/picture.h b/cc/resources/picture.h
index 8598fbf..bb1a988 100644
--- a/cc/resources/picture.h
+++ b/cc/resources/picture.h
@@ -24,7 +24,7 @@ class AnalysisCanvas;
 namespace cc {
 
 class ContentLayerClient;
-struct RenderingStats;
+class RenderingStatsInstrumentation;
 
 class CC_EXPORT Picture
     : public base::RefCountedThreadSafe<Picture> {
@@ -43,8 +43,9 @@ class CC_EXPORT Picture
 
   // Record a paint operation. To be able to safely use this SkPicture for
   // playback on a different thread this can only be called once.
-  void Record(ContentLayerClient*, RenderingStats*,
-      const SkTileGridPicture::TileGridInfo& tile_grid_info);
+  void Record(ContentLayerClient* painter,
+              RenderingStatsInstrumentation* stats_instrumentation,
+              const SkTileGridPicture::TileGridInfo& tile_grid_info);
 
   // Has Record() been called yet?
   bool HasRecording() const { return picture_.get() != NULL; }
diff --git a/cc/resources/picture_pile.cc b/cc/resources/picture_pile.cc
index 85a2e9b..bbb8f3d 100644
--- a/cc/resources/picture_pile.cc
+++ b/cc/resources/picture_pile.cc
@@ -36,7 +36,7 @@ void PicturePile::Update(
     SkColor background_color,
     const Region& invalidation,
     gfx::Rect visible_layer_rect,
-    RenderingStats* stats) {
+    RenderingStatsInstrumentation* stats_instrumentation) {
   background_color_ = background_color;
 
   gfx::Rect interest_rect = visible_layer_rect;
@@ -103,7 +103,7 @@ void PicturePile::Update(
     for (PictureList::iterator pic = pic_list.begin();
          pic != pic_list.end(); ++pic) {
       if (!(*pic)->HasRecording()) {
-        (*pic)->Record(painter, stats, tile_grid_info_);
+        (*pic)->Record(painter, stats_instrumentation, tile_grid_info_);
         (*pic)->CloneForDrawing(num_raster_threads_);
       }
     }
diff --git a/cc/resources/picture_pile.h b/cc/resources/picture_pile.h
index cc92bf8..bfd88f8 100644
--- a/cc/resources/picture_pile.h
+++ b/cc/resources/picture_pile.h
@@ -11,7 +11,7 @@
 namespace cc {
 class PicturePileImpl;
 class Region;
-struct RenderingStats;
+class RenderingStatsInstrumentation;
 
 class CC_EXPORT PicturePile : public PicturePileBase {
  public:
@@ -24,7 +24,7 @@ class CC_EXPORT PicturePile : public PicturePileBase {
       SkColor background_color,
       const Region& invalidation,
       gfx::Rect visible_layer_rect,
-      RenderingStats* stats);
+      RenderingStatsInstrumentation* stats_instrumentation);
 
   void set_num_raster_threads(int num_raster_threads) {
     num_raster_threads_ = num_raster_threads;
diff --git a/cc/resources/picture_pile_impl.cc b/cc/resources/picture_pile_impl.cc
index 4e425e5..8b54c8a 100644
--- a/cc/resources/picture_pile_impl.cc
+++ b/cc/resources/picture_pile_impl.cc
@@ -5,7 +5,6 @@
 #include "base/debug/trace_event.h"
 #include "cc/base/region.h"
 #include "cc/debug/debug_colors.h"
-#include "cc/debug/rendering_stats.h"
 #include "cc/resources/picture_pile_impl.h"
 #include "skia/ext/analysis_canvas.h"
 #include "third_party/skia/include/core/SkCanvas.h"
diff --git a/cc/resources/picture_pile_impl.h b/cc/resources/picture_pile_impl.h
index 34364bd..a1a3c70 100644
--- a/cc/resources/picture_pile_impl.h
+++ b/cc/resources/picture_pile_impl.h
@@ -16,7 +16,6 @@
 #include "third_party/skia/include/core/SkPicture.h"
 
 namespace cc {
-struct RenderingStats;
 
 class CC_EXPORT PicturePileImpl : public PicturePileBase {
  public:
diff --git a/cc/resources/skpicture_content_layer_updater.cc b/cc/resources/skpicture_content_layer_updater.cc
index 6ce3df8..41b17b7 100644
--- a/cc/resources/skpicture_content_layer_updater.cc
+++ b/cc/resources/skpicture_content_layer_updater.cc
@@ -22,21 +22,25 @@ SkPictureContentLayerUpdater::Resource::~Resource() {}
 void SkPictureContentLayerUpdater::Resource::Update(ResourceUpdateQueue* queue,
                                                     gfx::Rect source_rect,
                                                     gfx::Vector2d dest_offset,
-                                                    bool partial_update,
-                                                    RenderingStats*) {
+                                                    bool partial_update) {
   updater_->UpdateTexture(
       queue, texture(), source_rect, dest_offset, partial_update);
 }
 
 SkPictureContentLayerUpdater::SkPictureContentLayerUpdater(
-    scoped_ptr<LayerPainter> painter)
-    : ContentLayerUpdater(painter.Pass()), layer_is_opaque_(false) {}
+    scoped_ptr<LayerPainter> painter,
+    RenderingStatsInstrumentation* stats_instrumentation)
+    : ContentLayerUpdater(painter.Pass(), stats_instrumentation),
+      layer_is_opaque_(false) {}
 
 SkPictureContentLayerUpdater::~SkPictureContentLayerUpdater() {}
 
 scoped_refptr<SkPictureContentLayerUpdater>
-SkPictureContentLayerUpdater::Create(scoped_ptr<LayerPainter> painter) {
-  return make_scoped_refptr(new SkPictureContentLayerUpdater(painter.Pass()));
+SkPictureContentLayerUpdater::Create(
+    scoped_ptr<LayerPainter> painter,
+    RenderingStatsInstrumentation* stats_instrumentation) {
+  return make_scoped_refptr(
+      new SkPictureContentLayerUpdater(painter.Pass(), stats_instrumentation));
 }
 
 scoped_ptr<LayerUpdater::Resource> SkPictureContentLayerUpdater::CreateResource(
@@ -50,16 +54,14 @@ void SkPictureContentLayerUpdater::PrepareToUpdate(
     gfx::Size,
     float contents_width_scale,
     float contents_height_scale,
-    gfx::Rect* resulting_opaque_rect,
-    RenderingStats* stats) {
+    gfx::Rect* resulting_opaque_rect) {
   SkCanvas* canvas =
       picture_.beginRecording(content_rect.width(), content_rect.height());
   PaintContents(canvas,
                 content_rect,
                 contents_width_scale,
                 contents_height_scale,
-                resulting_opaque_rect,
-                stats);
+                resulting_opaque_rect);
   picture_.endRecording();
 }
 
diff --git a/cc/resources/skpicture_content_layer_updater.h b/cc/resources/skpicture_content_layer_updater.h
index 218bbc9..3422b96 100644
--- a/cc/resources/skpicture_content_layer_updater.h
+++ b/cc/resources/skpicture_content_layer_updater.h
@@ -30,8 +30,7 @@ class SkPictureContentLayerUpdater : public ContentLayerUpdater {
     virtual void Update(ResourceUpdateQueue* queue,
                         gfx::Rect source_rect,
                         gfx::Vector2d dest_offset,
-                        bool partial_update,
-                        RenderingStats* stats) OVERRIDE;
+                        bool partial_update) OVERRIDE;
 
    private:
     SkPictureContentLayerUpdater* updater_;
@@ -40,22 +39,24 @@ class SkPictureContentLayerUpdater : public ContentLayerUpdater {
   };
 
   static scoped_refptr<SkPictureContentLayerUpdater> Create(
-      scoped_ptr<LayerPainter> painter);
+      scoped_ptr<LayerPainter> painter,
+      RenderingStatsInstrumentation* stats_instrumentation);
 
   virtual scoped_ptr<LayerUpdater::Resource> CreateResource(
       PrioritizedResourceManager* manager) OVERRIDE;
   virtual void SetOpaque(bool opaque) OVERRIDE;
 
  protected:
-  explicit SkPictureContentLayerUpdater(scoped_ptr<LayerPainter> painter);
+  SkPictureContentLayerUpdater(
+      scoped_ptr<LayerPainter> painter,
+      RenderingStatsInstrumentation* stats_instrumentation);
   virtual ~SkPictureContentLayerUpdater();
 
   virtual void PrepareToUpdate(gfx::Rect content_rect,
                                gfx::Size tile_size,
                                float contents_width_scale,
                                float contents_height_scale,
-                               gfx::Rect* resulting_opaque_rect,
-                               RenderingStats* stats) OVERRIDE;
+                               gfx::Rect* resulting_opaque_rect) OVERRIDE;
   void DrawPicture(SkCanvas* canvas);
   void UpdateTexture(ResourceUpdateQueue* queue,
                      PrioritizedResource* texture,
diff --git a/cc/test/fake_content_layer.cc b/cc/test/fake_content_layer.cc
index 384521c..a30ea95 100644
--- a/cc/test/fake_content_layer.cc
+++ b/cc/test/fake_content_layer.cc
@@ -25,9 +25,8 @@ scoped_ptr<LayerImpl> FakeContentLayer::CreateLayerImpl(
 }
 
 void FakeContentLayer::Update(ResourceUpdateQueue* queue,
-                              const OcclusionTracker* occlusion,
-                              RenderingStats* stats) {
-  ContentLayer::Update(queue, occlusion, stats);
+                              const OcclusionTracker* occlusion) {
+  ContentLayer::Update(queue, occlusion);
   update_count_++;
 }
 
diff --git a/cc/test/fake_content_layer.h b/cc/test/fake_content_layer.h
index 52fea8f..cf8066a 100644
--- a/cc/test/fake_content_layer.h
+++ b/cc/test/fake_content_layer.h
@@ -24,8 +24,7 @@ class FakeContentLayer : public ContentLayer {
 
   virtual void Update(
       ResourceUpdateQueue* queue,
-      const OcclusionTracker* occlusion,
-      RenderingStats* stats) OVERRIDE;
+      const OcclusionTracker* occlusion) OVERRIDE;
 
   bool HaveBackingAt(int i, int j);
 
diff --git a/cc/test/fake_scrollbar_layer.cc b/cc/test/fake_scrollbar_layer.cc
index 96fbeec..457a5d1 100644
--- a/cc/test/fake_scrollbar_layer.cc
+++ b/cc/test/fake_scrollbar_layer.cc
@@ -31,11 +31,10 @@ FakeScrollbarLayer::FakeScrollbarLayer(bool paint_during_update,
 FakeScrollbarLayer::~FakeScrollbarLayer() {}
 
 void FakeScrollbarLayer::Update(ResourceUpdateQueue* queue,
-                                const OcclusionTracker* occlusion,
-                                RenderingStats* stats) {
+                                const OcclusionTracker* occlusion) {
   size_t full = queue->FullUploadSize();
   size_t partial = queue->PartialUploadSize();
-  ScrollbarLayer::Update(queue, occlusion, stats);
+  ScrollbarLayer::Update(queue, occlusion);
   update_count_++;
   last_update_full_upload_size_ = queue->FullUploadSize() - full;
   last_update_partial_upload_size_ = queue->PartialUploadSize() - partial;
diff --git a/cc/test/fake_scrollbar_layer.h b/cc/test/fake_scrollbar_layer.h
index f06f752..8d0d624 100644
--- a/cc/test/fake_scrollbar_layer.h
+++ b/cc/test/fake_scrollbar_layer.h
@@ -29,8 +29,7 @@ class FakeScrollbarLayer : public ScrollbarLayer {
   }
 
   virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion,
-                      RenderingStats* stats) OVERRIDE;
+                      const OcclusionTracker* occlusion) OVERRIDE;
 
  private:
   FakeScrollbarLayer(bool paint_during_update,
diff --git a/cc/test/tiled_layer_test_common.cc b/cc/test/tiled_layer_test_common.cc
index ce3d365..ece1ec6 100644
--- a/cc/test/tiled_layer_test_common.cc
+++ b/cc/test/tiled_layer_test_common.cc
@@ -18,8 +18,7 @@ FakeLayerUpdater::Resource::~Resource() {}
 void FakeLayerUpdater::Resource::Update(ResourceUpdateQueue* queue,
                                         gfx::Rect source_rect,
                                         gfx::Vector2d dest_offset,
-                                        bool partial_update,
-                                        RenderingStats* stats) {
+                                        bool partial_update) {
   const gfx::Rect kRect(0, 0, 10, 10);
   ResourceUpdate upload = ResourceUpdate::Create(
       texture(), &bitmap_, kRect, kRect, gfx::Vector2d());
@@ -39,8 +38,7 @@ void FakeLayerUpdater::PrepareToUpdate(gfx::Rect content_rect,
                                        gfx::Size tile_size,
                                        float contents_width_scale,
                                        float contents_height_scale,
-                                       gfx::Rect* resulting_opaque_rect,
-                                       RenderingStats* stats) {
+                                       gfx::Rect* resulting_opaque_rect) {
   prepare_count_++;
   last_update_rect_ = content_rect;
   if (!rect_to_invalidate_.IsEmpty()) {
diff --git a/cc/test/tiled_layer_test_common.h b/cc/test/tiled_layer_test_common.h
index 11666d3..9e84e6e 100644
--- a/cc/test/tiled_layer_test_common.h
+++ b/cc/test/tiled_layer_test_common.h
@@ -32,8 +32,7 @@ class FakeLayerUpdater : public LayerUpdater {
     virtual void Update(ResourceUpdateQueue* queue,
                         gfx::Rect source_rect,
                         gfx::Vector2d dest_offset,
-                        bool partial_update,
-                        RenderingStats* stats) OVERRIDE;
+                        bool partial_update) OVERRIDE;
 
    private:
     FakeLayerUpdater* layer_;
@@ -51,8 +50,7 @@ class FakeLayerUpdater : public LayerUpdater {
                                gfx::Size tile_size,
                                float contents_width_scale,
                                float contents_height_scale,
-                               gfx::Rect* resulting_opaque_rect,
-                               RenderingStats* stats) OVERRIDE;
+                               gfx::Rect* resulting_opaque_rect) OVERRIDE;
   // Sets the rect to invalidate during the next call to PrepareToUpdate().
   // After the next call to PrepareToUpdate() the rect is reset.
   void SetRectToInvalidate(gfx::Rect rect, FakeTiledLayer* layer);
diff --git a/cc/trees/layer_tree_host.cc b/cc/trees/layer_tree_host.cc
index 16f6be7..2ba6da2 100644
--- a/cc/trees/layer_tree_host.cc
+++ b/cc/trees/layer_tree_host.cc
@@ -829,8 +829,7 @@ size_t LayerTreeHost::CalculateMemoryForRenderSurfaces(
 }
 
 bool LayerTreeHost::PaintMasksForRenderSurface(Layer* render_surface_layer,
-                                               ResourceUpdateQueue* queue,
-                                               RenderingStats* stats) {
+                                               ResourceUpdateQueue* queue) {
   // Note: Masks and replicas only exist for layers that own render surfaces. If
   // we reach this point in code, we already know that at least something will
   // be drawn into this render surface, so the mask and replica should be
@@ -839,7 +838,7 @@ bool LayerTreeHost::PaintMasksForRenderSurface(Layer* render_surface_layer,
   bool need_more_updates = false;
   Layer* mask_layer = render_surface_layer->mask_layer();
   if (mask_layer) {
-    mask_layer->Update(queue, NULL, stats);
+    mask_layer->Update(queue, NULL);
     need_more_updates |= mask_layer->NeedMoreUpdates();
   }
 
@@ -847,7 +846,7 @@ bool LayerTreeHost::PaintMasksForRenderSurface(Layer* render_surface_layer,
       render_surface_layer->replica_layer() ?
       render_surface_layer->replica_layer()->mask_layer() : NULL;
   if (replica_mask_layer) {
-    replica_mask_layer->Update(queue, NULL, stats);
+    replica_mask_layer->Update(queue, NULL);
     need_more_updates |= replica_mask_layer->NeedMoreUpdates();
   }
   return need_more_updates;
@@ -875,11 +874,6 @@ bool LayerTreeHost::PaintLayerContents(
   PrioritizeTextures(render_surface_layer_list,
                      occlusion_tracker.overdraw_metrics());
 
-  // TODO(egraether): Use RenderingStatsInstrumentation in Layer::update()
-  RenderingStats stats;
-  RenderingStats* stats_ptr =
-      debug_state_.RecordRenderingStats() ? &stats : NULL;
-
   LayerIteratorType end = LayerIteratorType::End(&render_surface_layer_list);
   for (LayerIteratorType it =
            LayerIteratorType::Begin(&render_surface_layer_list);
@@ -890,18 +884,16 @@ bool LayerTreeHost::PaintLayerContents(
     if (it.represents_target_render_surface()) {
       DCHECK(it->render_surface()->draw_opacity() ||
              it->render_surface()->draw_opacity_is_animating());
-      need_more_updates |= PaintMasksForRenderSurface(*it, queue, stats_ptr);
+      need_more_updates |= PaintMasksForRenderSurface(*it, queue);
     } else if (it.represents_itself()) {
       DCHECK(!it->bounds().IsEmpty());
-      it->Update(queue, &occlusion_tracker, stats_ptr);
+      it->Update(queue, &occlusion_tracker);
       need_more_updates |= it->NeedMoreUpdates();
     }
 
     occlusion_tracker.LeaveLayer(it);
   }
 
-  rendering_stats_instrumentation_->AddStats(stats);
-
   occlusion_tracker.overdraw_metrics()->RecordMetrics(this);
 
   return need_more_updates;
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index 220cbb5..8f39439 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -255,8 +255,7 @@ class CC_EXPORT LayerTreeHost : NON_EXPORTED_BASE(public RateLimiterClient) {
   bool PaintLayerContents(const LayerList& render_surface_layer_list,
                           ResourceUpdateQueue* quue);
   bool PaintMasksForRenderSurface(Layer* render_surface_layer,
-                                  ResourceUpdateQueue* queue,
-                                  RenderingStats* stats);
+                                  ResourceUpdateQueue* queue);
 
   void UpdateLayers(Layer* root_layer, ResourceUpdateQueue* queue);
   void UpdateHudLayer();
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index 3025832..9a19950 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -449,13 +449,6 @@ class CC_EXPORT LayerTreeHostImpl : public InputHandlerClient,
   scoped_ptr<MemoryHistory> memory_history_;
   scoped_ptr<DebugRectHistory> debug_rect_history_;
 
-  int64 num_impl_thread_scrolls_;
-  int64 num_main_thread_scrolls_;
-
-  int64 cumulative_num_layers_drawn_;
-
-  int64 cumulative_num_missing_tiles_;
-
   size_t last_sent_memory_visible_bytes_;
   size_t last_sent_memory_visible_and_nearby_bytes_;
   size_t last_sent_memory_use_bytes_;
diff --git a/cc/trees/layer_tree_host_unittest.cc b/cc/trees/layer_tree_host_unittest.cc
index da2d891..c131feb 100644
--- a/cc/trees/layer_tree_host_unittest.cc
+++ b/cc/trees/layer_tree_host_unittest.cc
@@ -563,9 +563,8 @@ class ContentLayerWithUpdateTracking : public ContentLayer {
   void ResetPaintContentsCount() { paint_contents_count_ = 0; }
 
   virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion,
-                      RenderingStats* stats) OVERRIDE {
-    ContentLayer::Update(queue, occlusion, stats);
+                      const OcclusionTracker* occlusion) OVERRIDE {
+    ContentLayer::Update(queue, occlusion);
     paint_contents_count_++;
   }
 
@@ -1230,8 +1229,7 @@ class EvictionTestLayer : public Layer {
   }
 
   virtual void Update(ResourceUpdateQueue*,
-                      const OcclusionTracker*,
-                      RenderingStats*) OVERRIDE;
+                      const OcclusionTracker*) OVERRIDE;
   virtual bool DrawsContent() const OVERRIDE { return true; }
 
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
@@ -1291,8 +1289,7 @@ void EvictionTestLayer::SetTexturePriorities(const PriorityCalculator&) {
 }
 
 void EvictionTestLayer::Update(ResourceUpdateQueue* queue,
-                               const OcclusionTracker*,
-                               RenderingStats*) {
+                               const OcclusionTracker*) {
   CreateTextureIfNeeded();
   if (!texture_.get())
     return;
diff --git a/cc/trees/layer_tree_host_unittest_occlusion.cc b/cc/trees/layer_tree_host_unittest_occlusion.cc
index 3728c81..4656ef9 100644
--- a/cc/trees/layer_tree_host_unittest_occlusion.cc
+++ b/cc/trees/layer_tree_host_unittest_occlusion.cc
@@ -19,8 +19,7 @@ class TestLayer : public Layer {
 
   virtual void Update(
       ResourceUpdateQueue* update_queue,
-      const OcclusionTracker* occlusion,
-      RenderingStats* stats) OVERRIDE {
+      const OcclusionTracker* occlusion) OVERRIDE {
     if (!occlusion)
       return;
 
diff --git a/cc/trees/single_thread_proxy.cc b/cc/trees/single_thread_proxy.cc
index e63a8fc..8cde4fa 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -29,8 +29,7 @@ SingleThreadProxy::SingleThreadProxy(LayerTreeHost* layer_tree_host)
       created_offscreen_context_provider_(false),
       renderer_initialized_(false),
       next_frame_is_newly_committed_frame_(false),
-      inside_draw_(false),
-      total_commit_count_(0) {
+      inside_draw_(false) {
   TRACE_EVENT0("cc", "SingleThreadProxy::SingleThreadProxy");
   DCHECK(Proxy::IsMainThread());
   DCHECK(layer_tree_host);
diff --git a/cc/trees/single_thread_proxy.h b/cc/trees/single_thread_proxy.h
index ff8a9d3..140ef20 100644
--- a/cc/trees/single_thread_proxy.h
+++ b/cc/trees/single_thread_proxy.h
@@ -104,9 +104,6 @@ class SingleThreadProxy : public Proxy, LayerTreeHostImplClient {
 
   bool inside_draw_;
 
-  base::TimeDelta total_commit_time_;
-  size_t total_commit_count_;
-
   DISALLOW_COPY_AND_ASSIGN(SingleThreadProxy);
 };