Add support for bounds animations

cc/animation/element_animations.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/element_animations.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 336 matching lines @@
 void ElementAnimations::NotifyClientScrollOffsetAnimated(
     const gfx::ScrollOffset& scroll_offset,
     bool notify_active_elements,
     bool notify_pending_elements) {
   if (notify_active_elements && has_element_in_active_list())
     OnScrollOffsetAnimated(ElementListType::ACTIVE, scroll_offset);
   if (notify_pending_elements && has_element_in_pending_list())
     OnScrollOffsetAnimated(ElementListType::PENDING, scroll_offset);
 }
 
+void ElementAnimations::NotifyClientBoundsAnimated(
+    const gfx::SizeF& size,
+    bool notify_active_elements,
+    bool notify_pending_elements) {
+  // TODO(vollick): once we have an animation observer, we can remove client
+  // animated notifications we do not use in element animations, such as this
+  // one.
+}
+
 void ElementAnimations::UpdateClientAnimationState() {
   if (!element_id())
     return;
   DCHECK(animation_host());
   if (!animation_host()->mutator_host_client())
     return;
 
   PropertyAnimationState prev_pending = pending_state_;
   PropertyAnimationState prev_active = active_state_;
 
@@ skipping 121 matching lines @@
   if (animation_host()) {
     DCHECK(animation_host()->mutator_host_client());
     return animation_host()->mutator_host_client()->GetScrollOffsetForAnimation(
         element_id());
   }
 
   return gfx::ScrollOffset();
 }
 
 }  // namespace cc