Compute accurate screen space bounds for animated layers.

This walks up the layer tree transforming a layer's bounds as a box
through the different layer transforms and uses the
LayerAnimationController::AnimationBoundsForBox to transform the box at
layers which are animated.

Expansion of the box is included for filters which change the bounds,
however, the LayerAnimationController implementation is currently stubbed.

+ Added computation of animation bounds of layers in the screen space.
- Removed invalid assertion in LayerAnimationControllerTest.AnimatedBounds.
~ Renamed methods to use the uniform naming AnimationBounds.
~ Extracted LTHC::ApplySublayerTransformAboutAnchor from
  LTHC::CalculateDrawPropertiesInternal.
~ Fixed LayerImpl::AsValueInto to correctly calculate bounds.
! Did not substitute implementation of ApplySublayerTransformAboutAnchor
  inside CalculateDrawPropertiesInternal due to performance regression.


BUG=280375

Review URL: https://codereview.chromium.org/109193002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246767 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 5 insertions, 1 deletions

diff --git a/cc/debug/debug_rect_history.cc b/cc/debug/debug_rect_history.cc
index 679beaf..c361603 100644
--- a/cc/debug/debug_rect_history.cc
+++ b/cc/debug/debug_rect_history.cc
@@ -6,6 +6,7 @@
 
 #include "cc/base/math_util.h"
 #include "cc/layers/layer_impl.h"
+#include "cc/layers/layer_utils.h"
 #include "cc/layers/render_surface_impl.h"
 #include "cc/trees/damage_tracker.h"
 #include "cc/trees/layer_tree_host.h"
@@ -247,8 +248,11 @@ void DebugRectHistory::SaveLayerAnimationBoundsRects(
        it != end; ++it) {
     if (!it.represents_itself())
       continue;
+
+    // TODO(avallee): Figure out if we should show something for a layer who's
+    // animating bounds but that we can't compute them.
     gfx::BoxF inflated_bounds;
-    if (!(*it)->GetAnimationBounds(&inflated_bounds))
+    if (!LayerUtils::GetAnimationBounds(**it, &inflated_bounds))
       continue;
 
     debug_rects_.push_back(DebugRect(ANIMATION_BOUNDS_RECT_TYPE,