Enable accelerated animations for orphaned layers

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/keyframed_animation_curve.h"
 #include "cc/layer.h"
 #include "cc/layer_animation_controller.h"
 #include "cc/layer_impl.h"
@@ skipping 152 matching lines @@
 void FakeLayerAnimationValueObserver::OnTransformAnimated(const gfx::Transform& transform)
 {
     m_transform = transform;
 }
 
 bool FakeLayerAnimationValueObserver::IsActive() const
 {
     return true;
 }
 
+bool FakeLayerAnimationValueObserver::IsOrphaned() const
+{
+    return false;
+}
+
 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 startOpacity, float endOpacity, bool useTimingFunction)
 {
     return addOpacityTransition(controller, duration, startOpacity, endOpacity, useTimingFunction);
 }
 
@@ skipping 16 matching lines @@
 {
     return addAnimatedTransform(layer, duration, deltaX, deltaY);
 }
 
 int addAnimatedTransformToLayer(cc::LayerImpl& layer, double duration, int deltaX, int deltaY)
 {
     return addAnimatedTransform(*layer.layerAnimationController(), duration, deltaX, deltaY);
 }
 
 }  // namespace cc