Add support for bounds animations

cc/animation/animation_player.cc

 // Copyright 2015 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 "cc/animation/animation_player.h"
 
 #include <algorithm>
 
 #include "base/stl_util.h"
 #include "cc/animation/animation_delegate.h"
@@ skipping 766 matching lines @@
         case TargetProperty::SCROLL_OFFSET: {
           const ScrollOffsetAnimationCurve* scroll_offset_animation_curve =
               animations_[i]->curve()->ToScrollOffsetAnimationCurve();
           const gfx::ScrollOffset scroll_offset =
               scroll_offset_animation_curve->GetValue(trimmed);
           element_animations_->NotifyClientScrollOffsetAnimated(
               scroll_offset, animations_[i]->affects_active_elements(),
               animations_[i]->affects_pending_elements());
           break;
         }
+
+        case TargetProperty::BOUNDS: {
+          const SizeAnimationCurve* size_animation_curve =
+              animations_[i]->curve()->ToSizeAnimationCurve();
+          const gfx::SizeF size = size_animation_curve->GetValue(trimmed);
+          element_animations_->NotifyClientBoundsAnimated(
+              size, animations_[i]->affects_active_elements(),
+              animations_[i]->affects_pending_elements());
+          break;
+        }
       }
     }
   }
 
   last_tick_time_ = monotonic_time;
 }
 
 void AnimationPlayer::MarkFinishedAnimations(base::TimeTicks monotonic_time) {
   bool animation_finished = false;
 
@@ skipping 408 matching lines @@
     if (current_impl)
       animations_[i]->PushPropertiesTo(current_impl);
   }
 
   animation_player_impl->scroll_offset_animation_was_interrupted_ =
       scroll_offset_animation_was_interrupted_;
   scroll_offset_animation_was_interrupted_ = false;
 }
 
 }  // namespace cc