cc: Support animating scroll offset

cc/test/animation_test_common.cc

 // Copyright 2012 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/test/animation_test_common.h"
 
 #include "cc/animation/animation_id_provider.h"
 #include "cc/animation/keyframed_animation_curve.h"
 #include "cc/animation/layer_animation_controller.h"
 #include "cc/animation/transform_operations.h"
@@ skipping 187 matching lines @@
 
 void FakeLayerAnimationValueObserver::OnOpacityAnimated(float opacity) {
   opacity_ = opacity;
 }
 
 void FakeLayerAnimationValueObserver::OnTransformAnimated(
     const gfx::Transform& transform) {
   transform_ = transform;
 }
 
+void FakeLayerAnimationValueObserver::OnScrollOffsetAnimated(
+    gfx::Vector2dF scroll_offset) {
+  scroll_offset_ = scroll_offset;
+}
+
 void FakeLayerAnimationValueObserver::OnAnimationWaitingForDeletion() {
   animation_waiting_for_deletion_ = true;
 }
 
 bool FakeLayerAnimationValueObserver::IsActive() const {
   return true;
 }
 
 bool FakeInactiveLayerAnimationValueObserver::IsActive() const {
   return false;
 }
 
+gfx::Vector2dF FakeLayerAnimationValueProvider::ScrollOffsetForAnimation()
+    const {
+  return scroll_offset_;
+}
+
 scoped_ptr<cc::AnimationCurve> FakeFloatTransition::Clone() const {
   return make_scoped_ptr(
       new FakeFloatTransition(*this)).PassAs<cc::AnimationCurve>();
 }
 
 int AddOpacityTransitionToController(cc::LayerAnimationController* controller,
                                      double duration,
                                      float start_opacity,
                                      float end_opacity,
                                      bool use_timing_function) {
@@ skipping 74 matching lines @@
                              double duration,
                              float start_brightness,
                              float end_brightness) {
   return AddAnimatedFilter(layer->layer_animation_controller(),
                            duration,
                            start_brightness,
                            end_brightness);
 }
 
 }  // namespace cc