cc: Add a gathers pixel refs with positions util.

This is part 1 of reducing the number of picture walks
during GatherPixelRefs in picture.cc. This adds a utility
similar to SkPictureUtils except it gathers all lazy refs
in a picture along with their positions. Also adds tests.

BUG=242703

Review URL: https://chromiumcodereview.appspot.com/15732015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@203515 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 1180 insertions, 0 deletions

diff --git a/skia/ext/lazy_pixel_ref_utils.cc b/skia/ext/lazy_pixel_ref_utils.cc
new file mode 100644
index 0000000..87b487e
--- /dev/null
+++ b/skia/ext/lazy_pixel_ref_utils.cc
@@ -0,0 +1,417 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "lazy_pixel_ref_utils.h"
+
+#include "SkCanvas.h"
+#include "SkData.h"
+#include "SkDevice.h"
+#include "SkDraw.h"
+#include "SkPixelRef.h"
+#include "SkRRect.h"
+#include "SkRasterClip.h"
+#include "SkRect.h"
+#include "SkShader.h"
+
+#include "lazy_pixel_ref.h"
+
+namespace skia {
+
+namespace {
+
+// URI label for a lazily decoded SkPixelRef.
+const char kLabelLazyDecoded[] = "lazy";
+
+class LazyPixelRefSet {
+ public:
+  LazyPixelRefSet(
+      std::vector<LazyPixelRefUtils::PositionLazyPixelRef>* pixel_refs)
+      : pixel_refs_(pixel_refs) {}
+
+  void add(SkPixelRef* pixel_ref, const SkRect& rect) {
+    // Only save lazy pixel refs.
+    if (pixel_ref->getURI() &&
+        !strcmp(pixel_ref->getURI(), kLabelLazyDecoded)) {
+      LazyPixelRefUtils::PositionLazyPixelRef position_pixel_ref;
+      position_pixel_ref.lazy_pixel_ref =
+          static_cast<skia::LazyPixelRef*>(pixel_ref);
+      position_pixel_ref.pixel_ref_rect = rect;
+      pixel_refs_->push_back(position_pixel_ref);
+    }
+  }
+
+ private:
+  std::vector<LazyPixelRefUtils::PositionLazyPixelRef>* pixel_refs_;
+};
+
+class GatherPixelRefDevice : public SkDevice {
+ public:
+  GatherPixelRefDevice(const SkBitmap& bm, LazyPixelRefSet* lazy_pixel_ref_set)
+      : SkDevice(bm), lazy_pixel_ref_set_(lazy_pixel_ref_set) {}
+
+  virtual void clear(SkColor color) SK_OVERRIDE {}
+  virtual void writePixels(const SkBitmap& bitmap,
+                           int x,
+                           int y,
+                           SkCanvas::Config8888 config8888) SK_OVERRIDE {}
+
+  virtual void drawPaint(const SkDraw& draw, const SkPaint& paint) SK_OVERRIDE {
+    SkBitmap bitmap;
+    if (getBitmapFromPaint(paint, &bitmap)) {
+      SkRect clip_rect = SkRect::Make(draw.fRC->getBounds());
+      SkRect canvas_rect = SkRect::MakeWH(width(), height());
+      SkRect paint_rect = SkRect::MakeEmpty();
+      paint_rect.intersect(canvas_rect, clip_rect);
+
+      addBitmap(bitmap, paint_rect);
+    }
+  }
+
+  virtual void drawPoints(const SkDraw& draw,
+                          SkCanvas::PointMode mode,
+                          size_t count,
+                          const SkPoint points[],
+                          const SkPaint& paint) SK_OVERRIDE {
+    SkBitmap bitmap;
+    if (!getBitmapFromPaint(paint, &bitmap))
+      return;
+
+    if (count == 0)
+      return;
+
+    SkPoint min_point = points[0];
+    SkPoint max_point = points[0];
+    for (size_t i = 1; i < count; ++i) {
+      const SkPoint& point = points[i];
+      min_point.set(std::min(min_point.x(), point.x()),
+                    std::min(min_point.y(), point.y()));
+      max_point.set(std::max(max_point.x(), point.x()),
+                    std::max(max_point.y(), point.y()));
+    }
+
+    SkRect bounds = SkRect::MakeLTRB(
+        min_point.x(), min_point.y(), max_point.x(), max_point.y());
+
+    GatherPixelRefDevice::drawRect(draw, bounds, paint);
+  }
+  virtual void drawRect(const SkDraw& draw,
+                        const SkRect& rect,
+                        const SkPaint& paint) SK_OVERRIDE {
+    SkBitmap bitmap;
+    if (getBitmapFromPaint(paint, &bitmap)) {
+      SkRect mapped_rect;
+      draw.fMatrix->mapRect(&mapped_rect, rect);
+      mapped_rect.intersect(SkRect::Make(draw.fRC->getBounds()));
+      addBitmap(bitmap, mapped_rect);
+    }
+  }
+  virtual void drawOval(const SkDraw& draw,
+                        const SkRect& rect,
+                        const SkPaint& paint) SK_OVERRIDE {
+    GatherPixelRefDevice::drawRect(draw, rect, paint);
+  }
+  virtual void drawRRect(const SkDraw& draw,
+                         const SkRRect& rect,
+                         const SkPaint& paint) SK_OVERRIDE {
+    GatherPixelRefDevice::drawRect(draw, rect.rect(), paint);
+  }
+  virtual void drawPath(const SkDraw& draw,
+                        const SkPath& path,
+                        const SkPaint& paint,
+                        const SkMatrix* prePathMatrix,
+                        bool pathIsMutable) SK_OVERRIDE {
+    SkBitmap bitmap;
+    if (!getBitmapFromPaint(paint, &bitmap))
+      return;
+
+    SkRect path_bounds = path.getBounds();
+    SkRect final_rect;
+    if (prePathMatrix != NULL)
+      prePathMatrix->mapRect(&final_rect, path_bounds);
+    else
+      final_rect = path_bounds;
+
+    GatherPixelRefDevice::drawRect(draw, final_rect, paint);
+  }
+  virtual void drawBitmap(const SkDraw& draw,
+                          const SkBitmap& bitmap,
+                          const SkIRect* srcRectOrNull,
+                          const SkMatrix& matrix,
+                          const SkPaint& paint) SK_OVERRIDE {
+    SkMatrix total_matrix;
+    total_matrix.setConcat(*draw.fMatrix, matrix);
+
+    SkRect bitmap_rect = SkRect::MakeWH(bitmap.width(), bitmap.height());
+    SkRect mapped_rect;
+    total_matrix.mapRect(&mapped_rect, bitmap_rect);
+    addBitmap(bitmap, mapped_rect);
+
+    SkBitmap paint_bitmap;
+    if (getBitmapFromPaint(paint, &paint_bitmap))
+      addBitmap(paint_bitmap, mapped_rect);
+  }
+  virtual void drawBitmapRect(const SkDraw& draw,
+                              const SkBitmap& bitmap,
+                              const SkRect* srcOrNull,
+                              const SkRect& dst,
+                              const SkPaint& paint) SK_OVERRIDE {
+    SkRect bitmap_rect = SkRect::MakeWH(bitmap.width(), bitmap.height());
+    SkMatrix matrix;
+    matrix.setRectToRect(bitmap_rect, dst, SkMatrix::kFill_ScaleToFit);
+    GatherPixelRefDevice::drawBitmap(draw, bitmap, NULL, matrix, paint);
+  }
+  virtual void drawSprite(const SkDraw& draw,
+                          const SkBitmap& bitmap,
+                          int x,
+                          int y,
+                          const SkPaint& paint) SK_OVERRIDE {
+    // Sprites aren't affected by current matrix, so we can't reuse drawRect.
+    SkMatrix matrix;
+    matrix.setTranslate(x, y);
+
+    SkRect bitmap_rect = SkRect::MakeWH(bitmap.width(), bitmap.height());
+    SkRect mapped_rect;
+    matrix.mapRect(&mapped_rect, bitmap_rect);
+
+    addBitmap(bitmap, mapped_rect);
+    SkBitmap paint_bitmap;
+    if (getBitmapFromPaint(paint, &paint_bitmap))
+      addBitmap(paint_bitmap, mapped_rect);
+  }
+  virtual void drawText(const SkDraw& draw,
+                        const void* text,
+                        size_t len,
+                        SkScalar x,
+                        SkScalar y,
+                        const SkPaint& paint) SK_OVERRIDE {
+    SkBitmap bitmap;
+    if (!getBitmapFromPaint(paint, &bitmap))
+      return;
+
+    // Math is borrowed from SkBBoxRecord
+    SkRect bounds;
+    paint.measureText(text, len, &bounds);
+    SkPaint::FontMetrics metrics;
+    paint.getFontMetrics(&metrics);
+
+    if (paint.isVerticalText()) {
+      SkScalar h = bounds.fBottom - bounds.fTop;
+      if (paint.getTextAlign() == SkPaint::kCenter_Align) {
+        bounds.fTop -= h / 2;
+        bounds.fBottom -= h / 2;
+      }
+      bounds.fBottom += metrics.fBottom;
+      bounds.fTop += metrics.fTop;
+    }
+    else {
+      SkScalar w = bounds.fRight - bounds.fLeft;
+      if (paint.getTextAlign() == SkPaint::kCenter_Align) {
+        bounds.fLeft -= w / 2;
+        bounds.fRight -= w / 2;
+      } else if (paint.getTextAlign() == SkPaint::kRight_Align) {
+        bounds.fLeft -= w;
+        bounds.fRight -= w;
+      }
+      bounds.fTop = metrics.fTop;
+      bounds.fBottom = metrics.fBottom;
+    }
+
+    SkScalar pad = (metrics.fBottom - metrics.fTop) / 2;
+    bounds.fLeft -= pad;
+    bounds.fRight += pad;
+    bounds.fLeft += x;
+    bounds.fRight += x;
+    bounds.fTop += y;
+    bounds.fBottom += y;
+
+    GatherPixelRefDevice::drawRect(draw, bounds, paint);
+  }
+  virtual void drawPosText(const SkDraw& draw,
+                           const void* text,
+                           size_t len,
+                           const SkScalar pos[],
+                           SkScalar constY,
+                           int scalarsPerPos,
+                           const SkPaint& paint) SK_OVERRIDE {
+    SkBitmap bitmap;
+    if (!getBitmapFromPaint(paint, &bitmap))
+      return;
+
+    if (len == 0)
+      return;
+
+    // Similar to SkDraw asserts.
+    SkASSERT(scalarsPerPos == 1 || scalarsPerPos == 2);
+
+    SkPoint min_point;
+    SkPoint max_point;
+    if (scalarsPerPos == 1) {
+      min_point.set(pos[0], constY);
+      max_point.set(pos[0], constY);
+    } else if (scalarsPerPos == 2) {
+      min_point.set(pos[0], constY + pos[1]);
+      max_point.set(pos[0], constY + pos[1]);
+    }
+
+    for (size_t i = 0; i < len; ++i) {
+      SkScalar x = pos[i * scalarsPerPos];
+      SkScalar y = constY;
+      if (scalarsPerPos == 2)
+        y += pos[i * scalarsPerPos + 1];
+
+      min_point.set(
+        std::min(x, min_point.x()),
+        std::min(y, min_point.y()));
+      max_point.set(
+        std::max(x, max_point.x()),
+        std::max(y, max_point.y()));
+    }
+    
+    SkRect bounds = SkRect::MakeLTRB(
+        min_point.x(), min_point.y(), max_point.x(), max_point.y());
+
+    // Math is borrowed from SkBBoxRecord
+    SkPaint::FontMetrics metrics;
+    paint.getFontMetrics(&metrics);
+
+    bounds.fTop += metrics.fTop;
+    bounds.fBottom += metrics.fBottom;
+
+    SkScalar pad = (metrics.fTop - metrics.fBottom) / 2;
+    bounds.fLeft += pad;
+    bounds.fRight -= pad;
+
+    GatherPixelRefDevice::drawRect(draw, bounds, paint);
+  }
+  virtual void drawTextOnPath(const SkDraw& draw,
+                              const void* text,
+                              size_t len,
+                              const SkPath& path,
+                              const SkMatrix* matrix,
+                              const SkPaint& paint) SK_OVERRIDE {
+    SkBitmap bitmap;
+    if (!getBitmapFromPaint(paint, &bitmap))
+      return;
+
+    // Math is borrowed from SkBBoxRecord
+    SkRect bounds = path.getBounds();
+    SkPaint::FontMetrics metrics;
+    paint.getFontMetrics(&metrics);
+
+    SkScalar pad = metrics.fTop;
+    bounds.fLeft += pad;
+    bounds.fRight -= pad;
+    bounds.fTop += pad;
+    bounds.fBottom -= pad;
+
+    GatherPixelRefDevice::drawRect(draw, bounds, paint);
+  }
+  virtual void drawVertices(const SkDraw& draw,
+                            SkCanvas::VertexMode,
+                            int vertexCount,
+                            const SkPoint verts[],
+                            const SkPoint texs[],
+                            const SkColor colors[],
+                            SkXfermode* xmode,
+                            const uint16_t indices[],
+                            int indexCount,
+                            const SkPaint& paint) SK_OVERRIDE {
+    GatherPixelRefDevice::drawPoints(
+        draw, SkCanvas::kPolygon_PointMode, vertexCount, verts, paint);
+  }
+  virtual void drawDevice(const SkDraw&,
+                          SkDevice*,
+                          int x,
+                          int y,
+                          const SkPaint&) SK_OVERRIDE {}
+
+ protected:
+  virtual bool onReadPixels(const SkBitmap& bitmap,
+                            int x,
+                            int y,
+                            SkCanvas::Config8888 config8888) SK_OVERRIDE {
+    return false;
+  }
+
+ private:
+  LazyPixelRefSet* lazy_pixel_ref_set_;
+
+  void addBitmap(const SkBitmap& bm, const SkRect& rect) {
+    lazy_pixel_ref_set_->add(bm.pixelRef(), rect);
+  }
+
+  bool getBitmapFromPaint(const SkPaint& paint, SkBitmap* bm) {
+    SkShader* shader = paint.getShader();
+    if (shader) {
+      // Check whether the shader is a gradient in order to prevent generation
+      // of bitmaps from gradient shaders, which implement asABitmap.
+      if (SkShader::kNone_GradientType == shader->asAGradient(NULL))
+        return shader->asABitmap(bm, NULL, NULL);
+    }
+    return false;
+  }
+
+};
+
+class NoSaveLayerCanvas : public SkCanvas {
+ public:
+  NoSaveLayerCanvas(SkDevice* device) : INHERITED(device) {}
+
+  // Turn saveLayer() into save() for speed, should not affect correctness.
+  virtual int saveLayer(const SkRect* bounds,
+                        const SkPaint* paint,
+                        SaveFlags flags) SK_OVERRIDE {
+
+    // Like SkPictureRecord, we don't want to create layers, but we do need
+    // to respect the save and (possibly) its rect-clip.
+    int count = this->INHERITED::save(flags);
+    if (bounds) {
+      this->INHERITED::clipRectBounds(bounds, flags, NULL);
+    }
+    return count;
+  }
+
+  // Disable aa for speed.
+  virtual bool clipRect(const SkRect& rect, SkRegion::Op op, bool doAA)
+      SK_OVERRIDE {
+    return this->INHERITED::clipRect(rect, op, false);
+  }
+
+  virtual bool clipPath(const SkPath& path, SkRegion::Op op, bool doAA)
+      SK_OVERRIDE {
+    return this->updateClipConservativelyUsingBounds(
+        path.getBounds(), op, path.isInverseFillType());
+  }
+  virtual bool clipRRect(const SkRRect& rrect, SkRegion::Op op, bool doAA)
+      SK_OVERRIDE {
+    return this->updateClipConservativelyUsingBounds(
+        rrect.getBounds(), op, false);
+  }
+
+ private:
+  typedef SkCanvas INHERITED;
+};
+
+}  // namespace
+
+void LazyPixelRefUtils::GatherPixelRefs(
+    SkPicture* picture,
+    std::vector<PositionLazyPixelRef>* lazy_pixel_refs) {
+  lazy_pixel_refs->clear();
+  LazyPixelRefSet pixel_ref_set(lazy_pixel_refs);
+
+  SkBitmap emptyBitmap;
+  emptyBitmap.setConfig(
+      SkBitmap::kNo_Config, picture->width(), picture->height());
+
+  GatherPixelRefDevice device(emptyBitmap, &pixel_ref_set);
+  NoSaveLayerCanvas canvas(&device);
+
+  canvas.clipRect(SkRect::MakeWH(picture->width(), picture->height()),
+                  SkRegion::kIntersect_Op,
+                  false);
+  canvas.drawPicture(*picture);
+}
+
+}  // namespace skia
diff --git a/skia/ext/lazy_pixel_ref_utils.h b/skia/ext/lazy_pixel_ref_utils.h
new file mode 100644
index 0000000..e6cfdd1
--- /dev/null
+++ b/skia/ext/lazy_pixel_ref_utils.h
@@ -0,0 +1,33 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SKIA_EXT_LAZY_PIXEL_REF_UTILS_H_
+#define SKIA_EXT_LAZY_PIXEL_REF_UTILS_H_
+
+#include <vector>
+
+#include "SkPicture.h"
+#include "SkRect.h"
+
+namespace skia {
+
+class LazyPixelRef;
+class SK_API LazyPixelRefUtils {
+ public:
+
+  struct PositionLazyPixelRef {
+    skia::LazyPixelRef* lazy_pixel_ref;
+    SkRect pixel_ref_rect;
+  };
+
+  static void GatherPixelRefs(
+      SkPicture* picture,
+      std::vector<PositionLazyPixelRef>* lazy_pixel_refs);
+};
+
+typedef std::vector<LazyPixelRefUtils::PositionLazyPixelRef> LazyPixelRefList;
+
+}
+
+#endif
diff --git a/skia/ext/lazy_pixel_ref_utils_unittest.cc b/skia/ext/lazy_pixel_ref_utils_unittest.cc
new file mode 100644
index 0000000..2854ef0
--- /dev/null
+++ b/skia/ext/lazy_pixel_ref_utils_unittest.cc
@@ -0,0 +1,730 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "cc/test/geometry_test_utils.h"
+#include "skia/ext/lazy_pixel_ref.h"
+#include "skia/ext/lazy_pixel_ref_utils.h"
+#include "skia/ext/refptr.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkFlattenableBuffers.h"
+#include "third_party/skia/include/core/SkPoint.h"
+#include "third_party/skia/include/core/SkShader.h"
+#include "third_party/skia/src/core/SkOrderedReadBuffer.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/skia_util.h"
+
+namespace skia {
+
+namespace {
+
+void CreateBitmap(gfx::Size size, const char* uri, SkBitmap* bitmap);
+
+class TestPixelRef : public SkPixelRef {
+ public:
+  TestPixelRef(int width, int height);
+  virtual ~TestPixelRef();
+
+  virtual SkFlattenable::Factory getFactory() OVERRIDE;
+  virtual void* onLockPixels(SkColorTable** color_table) OVERRIDE;
+  virtual void onUnlockPixels() OVERRIDE {}
+  virtual SkPixelRef* deepCopy(SkBitmap::Config config, const SkIRect* subset)
+      OVERRIDE;
+
+ private:
+  scoped_ptr<char[]> pixels_;
+};
+
+class TestLazyPixelRef : public skia::LazyPixelRef {
+ public:
+  TestLazyPixelRef(int width, int height);
+  virtual ~TestLazyPixelRef();
+
+  virtual SkFlattenable::Factory getFactory() OVERRIDE;
+  virtual void* onLockPixels(SkColorTable** color_table) OVERRIDE;
+  virtual void onUnlockPixels() OVERRIDE {}
+  virtual bool PrepareToDecode(const PrepareParams& params) OVERRIDE;
+  virtual SkPixelRef* deepCopy(SkBitmap::Config config, const SkIRect* subset)
+      OVERRIDE;
+  virtual void Decode() OVERRIDE {}
+
+ private:
+  scoped_ptr<char[]> pixels_;
+};
+
+class TestLazyShader : public SkShader {
+ public:
+  TestLazyShader() { CreateBitmap(gfx::Size(50, 50), "lazy", &bitmap_); }
+
+  TestLazyShader(SkFlattenableReadBuffer& flattenable_buffer) {
+    SkOrderedReadBuffer& buffer =
+        static_cast<SkOrderedReadBuffer&>(flattenable_buffer);
+    SkReader32* reader = buffer.getReader32();
+
+    reader->skip(-4);
+    uint32_t toSkip = reader->readU32();
+    reader->skip(toSkip);
+
+    CreateBitmap(gfx::Size(50, 50), "lazy", &bitmap_);
+  }
+
+  virtual SkShader::BitmapType asABitmap(SkBitmap* bitmap,
+                                         SkMatrix* matrix,
+                                         TileMode xy[2]) const OVERRIDE {
+    if (bitmap)
+      *bitmap = bitmap_;
+    return SkShader::kDefault_BitmapType;
+  }
+
+  // Pure virtual implementaiton.
+  virtual void shadeSpan(int x, int y, SkPMColor[], int count) OVERRIDE {}
+  SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(TestLazyShader);
+
+ private:
+  SkBitmap bitmap_;
+};
+
+TestPixelRef::TestPixelRef(int width, int height)
+    : pixels_(new char[4 * width * height]) {}
+
+TestPixelRef::~TestPixelRef() {}
+
+SkFlattenable::Factory TestPixelRef::getFactory() { return NULL; }
+
+void* TestPixelRef::onLockPixels(SkColorTable** color_table) {
+  return pixels_.get();
+}
+
+SkPixelRef* TestPixelRef::deepCopy(SkBitmap::Config config,
+                                   const SkIRect* subset) {
+  this->ref();
+  return this;
+}
+
+TestLazyPixelRef::TestLazyPixelRef(int width, int height)
+    : pixels_(new char[4 * width * height]) {}
+
+TestLazyPixelRef::~TestLazyPixelRef() {}
+
+SkFlattenable::Factory TestLazyPixelRef::getFactory() { return NULL; }
+
+void* TestLazyPixelRef::onLockPixels(SkColorTable** color_table) {
+  return pixels_.get();
+}
+
+bool TestLazyPixelRef::PrepareToDecode(const PrepareParams& params) {
+  return true;
+}
+
+SkPixelRef* TestLazyPixelRef::deepCopy(SkBitmap::Config config,
+                                       const SkIRect* subset) {
+  this->ref();
+  return this;
+}
+
+void CreateBitmap(gfx::Size size, const char* uri, SkBitmap* bitmap) {
+  skia::RefPtr<TestLazyPixelRef> lazy_pixel_ref =
+      skia::AdoptRef(new TestLazyPixelRef(size.width(), size.height()));
+  lazy_pixel_ref->setURI(uri);
+
+  bitmap->setConfig(SkBitmap::kARGB_8888_Config, size.width(), size.height());
+  bitmap->setPixelRef(lazy_pixel_ref.get());
+}
+
+SkCanvas* StartRecording(SkPicture* picture, gfx::Rect layer_rect) {
+  SkCanvas* canvas = picture->beginRecording(
+      layer_rect.width(),
+      layer_rect.height(),
+      SkPicture::kUsePathBoundsForClip_RecordingFlag |
+          SkPicture::kOptimizeForClippedPlayback_RecordingFlag);
+
+  canvas->save();
+  canvas->translate(-layer_rect.x(), -layer_rect.y());
+  canvas->clipRect(SkRect::MakeXYWH(
+      layer_rect.x(), layer_rect.y(), layer_rect.width(), layer_rect.height()));
+
+  return canvas;
+}
+
+void StopRecording(SkPicture* picture, SkCanvas* canvas) {
+  canvas->restore();
+  picture->endRecording();
+}
+
+}  // namespace
+
+TEST(LazyPixelRefUtilsTest, DrawPaint) {
+  gfx::Rect layer_rect(0, 0, 256, 256);
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = StartRecording(picture.get(), layer_rect);
+
+  TestLazyShader first_shader;
+  SkPaint first_paint;
+  first_paint.setShader(&first_shader);
+
+  TestLazyShader second_shader;
+  SkPaint second_paint;
+  second_paint.setShader(&second_shader);
+
+  TestLazyShader third_shader;
+  SkPaint third_paint;
+  third_paint.setShader(&third_shader);
+
+  canvas->drawPaint(first_paint);
+  canvas->clipRect(SkRect::MakeXYWH(34, 45, 56, 67));
+  canvas->drawPaint(second_paint);
+  // Total clip is now (34, 45, 56, 55)
+  canvas->clipRect(SkRect::MakeWH(100, 100));
+  canvas->drawPaint(third_paint);
+
+  StopRecording(picture.get(), canvas);
+
+  std::vector<skia::LazyPixelRefUtils::PositionLazyPixelRef> pixel_refs;
+  skia::LazyPixelRefUtils::GatherPixelRefs(picture.get(), &pixel_refs);
+
+  EXPECT_EQ(3u, pixel_refs.size());
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(0, 0, 256, 256),
+                       gfx::SkRectToRectF(pixel_refs[0].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(34, 45, 56, 67),
+                       gfx::SkRectToRectF(pixel_refs[1].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(34, 45, 56, 55),
+                       gfx::SkRectToRectF(pixel_refs[2].pixel_ref_rect));
+}
+
+TEST(LazyPixelRefUtilsTest, DrawPoints) {
+  gfx::Rect layer_rect(0, 0, 256, 256);
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = StartRecording(picture.get(), layer_rect);
+
+  TestLazyShader first_shader;
+  SkPaint first_paint;
+  first_paint.setShader(&first_shader);
+
+  TestLazyShader second_shader;
+  SkPaint second_paint;
+  second_paint.setShader(&second_shader);
+
+  TestLazyShader third_shader;
+  SkPaint third_paint;
+  third_paint.setShader(&third_shader);
+
+  SkPoint points[3];
+  points[0].set(10, 10);
+  points[1].set(100, 20);
+  points[2].set(50, 100);
+  // (10, 10, 90, 90).
+  canvas->drawPoints(SkCanvas::kPolygon_PointMode, 3, points, first_paint);
+
+  canvas->save();
+
+  canvas->clipRect(SkRect::MakeWH(50, 50));
+  // (10, 10, 40, 40).
+  canvas->drawPoints(SkCanvas::kPolygon_PointMode, 3, points, second_paint);
+
+  canvas->restore();
+
+  points[0].set(50, 55);
+  points[1].set(50, 55);
+  points[2].set(200, 200);
+  // (50, 55, 150, 145).
+  canvas->drawPoints(SkCanvas::kPolygon_PointMode, 3, points, third_paint);
+
+  StopRecording(picture.get(), canvas);
+
+  std::vector<skia::LazyPixelRefUtils::PositionLazyPixelRef> pixel_refs;
+  skia::LazyPixelRefUtils::GatherPixelRefs(picture.get(), &pixel_refs);
+
+  EXPECT_EQ(3u, pixel_refs.size());
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(10, 10, 90, 90),
+                       gfx::SkRectToRectF(pixel_refs[0].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(10, 10, 40, 40),
+                       gfx::SkRectToRectF(pixel_refs[1].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(50, 55, 150, 145),
+                       gfx::SkRectToRectF(pixel_refs[2].pixel_ref_rect));
+}
+
+TEST(LazyPixelRefUtilsTest, DrawRect) {
+  gfx::Rect layer_rect(0, 0, 256, 256);
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = StartRecording(picture.get(), layer_rect);
+
+  TestLazyShader first_shader;
+  SkPaint first_paint;
+  first_paint.setShader(&first_shader);
+
+  TestLazyShader second_shader;
+  SkPaint second_paint;
+  second_paint.setShader(&second_shader);
+
+  TestLazyShader third_shader;
+  SkPaint third_paint;
+  third_paint.setShader(&third_shader);
+
+  // (10, 20, 30, 40).
+  canvas->drawRect(SkRect::MakeXYWH(10, 20, 30, 40), first_paint);
+
+  canvas->save();
+
+  canvas->translate(5, 17);
+  // (5, 50, 25, 35)
+  canvas->drawRect(SkRect::MakeXYWH(0, 33, 25, 35), second_paint);
+
+  canvas->restore();
+
+  canvas->clipRect(SkRect::MakeXYWH(50, 50, 50, 50));
+  canvas->translate(20, 20);
+  // (50, 50, 50, 50)
+  canvas->drawRect(SkRect::MakeXYWH(0, 0, 100, 100), third_paint);
+
+  std::vector<skia::LazyPixelRefUtils::PositionLazyPixelRef> pixel_refs;
+  skia::LazyPixelRefUtils::GatherPixelRefs(picture.get(), &pixel_refs);
+
+  EXPECT_EQ(3u, pixel_refs.size());
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(10, 20, 30, 40),
+                       gfx::SkRectToRectF(pixel_refs[0].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(5, 50, 25, 35),
+                       gfx::SkRectToRectF(pixel_refs[1].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(50, 50, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[2].pixel_ref_rect));
+}
+
+TEST(LazyPixelRefUtilsTest, DrawRRect) {
+  gfx::Rect layer_rect(0, 0, 256, 256);
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = StartRecording(picture.get(), layer_rect);
+
+  TestLazyShader first_shader;
+  SkPaint first_paint;
+  first_paint.setShader(&first_shader);
+
+  TestLazyShader second_shader;
+  SkPaint second_paint;
+  second_paint.setShader(&second_shader);
+
+  TestLazyShader third_shader;
+  SkPaint third_paint;
+  third_paint.setShader(&third_shader);
+
+  SkRRect rrect;
+  rrect.setRect(SkRect::MakeXYWH(10, 20, 30, 40));
+
+  // (10, 20, 30, 40).
+  canvas->drawRRect(rrect, first_paint);
+
+  canvas->save();
+
+  canvas->translate(5, 17);
+  rrect.setRect(SkRect::MakeXYWH(0, 33, 25, 35));
+  // (5, 50, 25, 35)
+  canvas->drawRRect(rrect, second_paint);
+
+  canvas->restore();
+
+  canvas->clipRect(SkRect::MakeXYWH(50, 50, 50, 50));
+  canvas->translate(20, 20);
+  rrect.setRect(SkRect::MakeXYWH(0, 0, 100, 100));
+  // (50, 50, 50, 50)
+  canvas->drawRRect(rrect, third_paint);
+
+  std::vector<skia::LazyPixelRefUtils::PositionLazyPixelRef> pixel_refs;
+  skia::LazyPixelRefUtils::GatherPixelRefs(picture.get(), &pixel_refs);
+
+  EXPECT_EQ(3u, pixel_refs.size());
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(10, 20, 30, 40),
+                       gfx::SkRectToRectF(pixel_refs[0].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(5, 50, 25, 35),
+                       gfx::SkRectToRectF(pixel_refs[1].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(50, 50, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[2].pixel_ref_rect));
+}
+
+TEST(LazyPixelRefUtilsTest, DrawOval) {
+  gfx::Rect layer_rect(0, 0, 256, 256);
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = StartRecording(picture.get(), layer_rect);
+
+  TestLazyShader first_shader;
+  SkPaint first_paint;
+  first_paint.setShader(&first_shader);
+
+  TestLazyShader second_shader;
+  SkPaint second_paint;
+  second_paint.setShader(&second_shader);
+
+  TestLazyShader third_shader;
+  SkPaint third_paint;
+  third_paint.setShader(&third_shader);
+
+  canvas->save();
+
+  canvas->scale(2, 0.5);
+  // (20, 10, 60, 20).
+  canvas->drawOval(SkRect::MakeXYWH(10, 20, 30, 40), first_paint);
+
+  canvas->restore();
+  canvas->save();
+
+  canvas->translate(1, 2);
+  // (1, 35, 25, 35)
+  canvas->drawRect(SkRect::MakeXYWH(0, 33, 25, 35), second_paint);
+
+  canvas->restore();
+
+  canvas->clipRect(SkRect::MakeXYWH(50, 50, 50, 50));
+  canvas->translate(20, 20);
+  // (50, 50, 50, 50)
+  canvas->drawRect(SkRect::MakeXYWH(0, 0, 100, 100), third_paint);
+
+  std::vector<skia::LazyPixelRefUtils::PositionLazyPixelRef> pixel_refs;
+  skia::LazyPixelRefUtils::GatherPixelRefs(picture.get(), &pixel_refs);
+
+  EXPECT_EQ(3u, pixel_refs.size());
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(20, 10, 60, 20),
+                       gfx::SkRectToRectF(pixel_refs[0].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(1, 35, 25, 35),
+                       gfx::SkRectToRectF(pixel_refs[1].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(50, 50, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[2].pixel_ref_rect));
+}
+
+TEST(LazyPixelRefUtilsTest, DrawPath) {
+  gfx::Rect layer_rect(0, 0, 256, 256);
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = StartRecording(picture.get(), layer_rect);
+
+  TestLazyShader first_shader;
+  SkPaint first_paint;
+  first_paint.setShader(&first_shader);
+
+  TestLazyShader second_shader;
+  SkPaint second_paint;
+  second_paint.setShader(&second_shader);
+
+  SkPath path;
+  path.moveTo(12, 13);
+  path.lineTo(50, 50);
+  path.lineTo(22, 101);
+
+  // (12, 13, 38, 88).
+  canvas->drawPath(path, first_paint);
+
+  canvas->save();
+  canvas->clipRect(SkRect::MakeWH(50, 50));
+
+  // (12, 13, 38, 37).
+  canvas->drawPath(path, second_paint);
+
+  canvas->restore();
+
+  StopRecording(picture.get(), canvas);
+
+  std::vector<skia::LazyPixelRefUtils::PositionLazyPixelRef> pixel_refs;
+  skia::LazyPixelRefUtils::GatherPixelRefs(picture.get(), &pixel_refs);
+
+  EXPECT_EQ(2u, pixel_refs.size());
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(12, 13, 38, 88),
+                       gfx::SkRectToRectF(pixel_refs[0].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(12, 13, 38, 37),
+                       gfx::SkRectToRectF(pixel_refs[1].pixel_ref_rect));
+}
+
+TEST(LazyPixelRefUtilsTest, DrawBitmap) {
+  gfx::Rect layer_rect(0, 0, 256, 256);
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = StartRecording(picture.get(), layer_rect);
+
+  SkBitmap first;
+  CreateBitmap(gfx::Size(50, 50), "lazy", &first);
+  SkBitmap second;
+  CreateBitmap(gfx::Size(50, 50), "lazy", &second);
+  SkBitmap third;
+  CreateBitmap(gfx::Size(50, 50), "lazy", &third);
+  SkBitmap fourth;
+  CreateBitmap(gfx::Size(50, 1), "lazy", &fourth);
+  SkBitmap fifth;
+  CreateBitmap(gfx::Size(10, 10), "lazy", &fifth);
+
+  canvas->save();
+
+  // At (0, 0).
+  canvas->drawBitmap(first, 0, 0);
+  canvas->translate(25, 0);
+  // At (25, 0).
+  canvas->drawBitmap(second, 0, 0);
+  canvas->translate(0, 50);
+  // At (50, 50).
+  canvas->drawBitmap(third, 25, 0);
+
+  canvas->restore();
+  canvas->save();
+
+  canvas->rotate(90);
+  // At (0, 0), rotated 90 degrees
+  canvas->drawBitmap(fourth, 0, 0);
+
+  canvas->restore();
+
+  canvas->scale(5, 6);
+  // At (0, 0), scaled by 5 and 6
+  canvas->drawBitmap(fifth, 0, 0);
+
+  StopRecording(picture.get(), canvas);
+
+  std::vector<skia::LazyPixelRefUtils::PositionLazyPixelRef> pixel_refs;
+  skia::LazyPixelRefUtils::GatherPixelRefs(picture.get(), &pixel_refs);
+
+  EXPECT_EQ(5u, pixel_refs.size());
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(0, 0, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[0].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(25, 0, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[1].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(50, 50, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[2].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(-1, 0, 1, 50),
+                       gfx::SkRectToRectF(pixel_refs[3].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(0, 0, 50, 60),
+                       gfx::SkRectToRectF(pixel_refs[4].pixel_ref_rect));
+
+}
+
+TEST(LazyPixelRefUtilsTest, DrawBitmapRect) {
+  gfx::Rect layer_rect(0, 0, 256, 256);
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = StartRecording(picture.get(), layer_rect);
+
+  SkBitmap first;
+  CreateBitmap(gfx::Size(50, 50), "lazy", &first);
+  SkBitmap second;
+  CreateBitmap(gfx::Size(50, 50), "lazy", &second);
+  SkBitmap third;
+  CreateBitmap(gfx::Size(50, 50), "lazy", &third);
+
+  TestLazyShader first_shader;
+  SkPaint first_paint;
+  first_paint.setShader(&first_shader);
+
+  SkPaint non_lazy_paint;
+
+  canvas->save();
+
+  // (0, 0, 100, 100).
+  canvas->drawBitmapRect(first, SkRect::MakeWH(100, 100), &non_lazy_paint);
+  canvas->translate(25, 0);
+  // (75, 50, 10, 10).
+  canvas->drawBitmapRect(
+      second, SkRect::MakeXYWH(50, 50, 10, 10), &non_lazy_paint);
+  canvas->translate(5, 50);
+  // (0, 30, 100, 100). One from bitmap, one from paint.
+  canvas->drawBitmapRect(
+      third, SkRect::MakeXYWH(-30, -20, 100, 100), &first_paint);
+
+  canvas->restore();
+
+  StopRecording(picture.get(), canvas);
+
+  std::vector<skia::LazyPixelRefUtils::PositionLazyPixelRef> pixel_refs;
+  skia::LazyPixelRefUtils::GatherPixelRefs(picture.get(), &pixel_refs);
+
+  EXPECT_EQ(4u, pixel_refs.size());
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(0, 0, 100, 100),
+                       gfx::SkRectToRectF(pixel_refs[0].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(75, 50, 10, 10),
+                       gfx::SkRectToRectF(pixel_refs[1].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(0, 30, 100, 100),
+                       gfx::SkRectToRectF(pixel_refs[2].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(0, 30, 100, 100),
+                       gfx::SkRectToRectF(pixel_refs[3].pixel_ref_rect));
+}
+
+TEST(LazyPixelRefUtilsTest, DrawSprite) {
+  gfx::Rect layer_rect(0, 0, 256, 256);
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = StartRecording(picture.get(), layer_rect);
+
+  SkBitmap first;
+  CreateBitmap(gfx::Size(50, 50), "lazy", &first);
+  SkBitmap second;
+  CreateBitmap(gfx::Size(50, 50), "lazy", &second);
+  SkBitmap third;
+  CreateBitmap(gfx::Size(50, 50), "lazy", &third);
+  SkBitmap fourth;
+  CreateBitmap(gfx::Size(50, 50), "lazy", &fourth);
+  SkBitmap fifth;
+  CreateBitmap(gfx::Size(50, 50), "lazy", &fifth);
+
+  canvas->save();
+
+  // Sprites aren't affected by the current matrix.
+
+  // (0, 0, 50, 50).
+  canvas->drawSprite(first, 0, 0);
+  canvas->translate(25, 0);
+  // (10, 0, 50, 50).
+  canvas->drawSprite(second, 10, 0);
+  canvas->translate(0, 50);
+  // (25, 0, 50, 50).
+  canvas->drawSprite(third, 25, 0);
+
+  canvas->restore();
+  canvas->save();
+
+  canvas->rotate(90);
+  // (0, 0, 50, 50).
+  canvas->drawSprite(fourth, 0, 0);
+
+  canvas->restore();
+
+  TestLazyShader first_shader;
+  SkPaint first_paint;
+  first_paint.setShader(&first_shader);
+
+  canvas->scale(5, 6);
+  // (100, 100, 50, 50).
+  canvas->drawSprite(fifth, 100, 100, &first_paint);
+
+  StopRecording(picture.get(), canvas);
+
+  std::vector<skia::LazyPixelRefUtils::PositionLazyPixelRef> pixel_refs;
+  skia::LazyPixelRefUtils::GatherPixelRefs(picture.get(), &pixel_refs);
+
+  EXPECT_EQ(6u, pixel_refs.size());
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(0, 0, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[0].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(10, 0, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[1].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(25, 0, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[2].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(0, 0, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[3].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(100, 100, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[4].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(100, 100, 50, 50),
+                       gfx::SkRectToRectF(pixel_refs[5].pixel_ref_rect));
+}
+
+TEST(LazyPixelRefUtilsTest, DrawText) {
+  gfx::Rect layer_rect(0, 0, 256, 256);
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = StartRecording(picture.get(), layer_rect);
+
+  TestLazyShader first_shader;
+  SkPaint first_paint;
+  first_paint.setShader(&first_shader);
+
+  SkPoint points[4];
+  points[0].set(10, 50);
+  points[1].set(20, 50);
+  points[2].set(30, 50);
+  points[3].set(40, 50);
+
+  SkPath path;
+  path.moveTo(10, 50);
+  path.lineTo(20, 50);
+  path.lineTo(30, 50);
+  path.lineTo(40, 50);
+  path.lineTo(50, 50);
+
+  canvas->drawText("text", 4, 50, 50, first_paint);
+  canvas->drawPosText("text", 4, points, first_paint);
+  canvas->drawTextOnPath("text", 4, path, NULL, first_paint);
+
+  std::vector<skia::LazyPixelRefUtils::PositionLazyPixelRef> pixel_refs;
+  skia::LazyPixelRefUtils::GatherPixelRefs(picture.get(), &pixel_refs);
+
+  EXPECT_EQ(3u, pixel_refs.size());
+}
+
+TEST(LazyPixelRefUtilsTest, DrawVertices) {
+  gfx::Rect layer_rect(0, 0, 256, 256);
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = StartRecording(picture.get(), layer_rect);
+
+  TestLazyShader first_shader;
+  SkPaint first_paint;
+  first_paint.setShader(&first_shader);
+
+  TestLazyShader second_shader;
+  SkPaint second_paint;
+  second_paint.setShader(&second_shader);
+
+  TestLazyShader third_shader;
+  SkPaint third_paint;
+  third_paint.setShader(&third_shader);
+
+  SkPoint points[3];
+  SkColor colors[3];
+  uint16_t indecies[3] = {0, 1, 2};
+  points[0].set(10, 10);
+  points[1].set(100, 20);
+  points[2].set(50, 100);
+  // (10, 10, 90, 90).
+  canvas->drawVertices(SkCanvas::kTriangles_VertexMode,
+                       3,
+                       points,
+                       points,
+                       colors,
+                       NULL,
+                       indecies,
+                       3,
+                       first_paint);
+
+  canvas->save();
+
+  canvas->clipRect(SkRect::MakeWH(50, 50));
+  // (10, 10, 40, 40).
+  canvas->drawVertices(SkCanvas::kTriangles_VertexMode,
+                       3,
+                       points,
+                       points,
+                       colors,
+                       NULL,
+                       indecies,
+                       3,
+                       second_paint);
+
+  canvas->restore();
+
+  points[0].set(50, 55);
+  points[1].set(50, 55);
+  points[2].set(200, 200);
+  // (50, 55, 150, 145).
+  canvas->drawVertices(SkCanvas::kTriangles_VertexMode,
+                       3,
+                       points,
+                       points,
+                       colors,
+                       NULL,
+                       indecies,
+                       3,
+                       third_paint);
+
+  StopRecording(picture.get(), canvas);
+
+  std::vector<skia::LazyPixelRefUtils::PositionLazyPixelRef> pixel_refs;
+  skia::LazyPixelRefUtils::GatherPixelRefs(picture.get(), &pixel_refs);
+
+  EXPECT_EQ(3u, pixel_refs.size());
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(10, 10, 90, 90),
+                       gfx::SkRectToRectF(pixel_refs[0].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(10, 10, 40, 40),
+                       gfx::SkRectToRectF(pixel_refs[1].pixel_ref_rect));
+  EXPECT_FLOAT_RECT_EQ(gfx::RectF(50, 55, 150, 145),
+                       gfx::SkRectToRectF(pixel_refs[2].pixel_ref_rect));
+}
+
+}  // namespace skia