We don't want to tick animation controllers for non-active layers

cc/test/animation_test_common.h

 // 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.
 
 #ifndef CC_TEST_ANIMATION_TEST_COMMON_H_
 #define CC_TEST_ANIMATION_TEST_COMMON_H_
 
 #include "cc/active_animation.h"
 #include "cc/animation_curve.h"
 #include "cc/layer_animation_controller.h"
@@ skipping 51 matching lines @@
 };
 
 class FakeLayerAnimationValueObserver : public cc::LayerAnimationValueObserver {
 public:
     FakeLayerAnimationValueObserver();
     virtual ~FakeLayerAnimationValueObserver();
 
     // LayerAnimationValueObserver implementation
     virtual void OnOpacityAnimated(float) OVERRIDE;
     virtual void OnTransformAnimated(const gfx::Transform&) OVERRIDE;
+    virtual bool IsActive() const OVERRIDE;
 
     float opacity() const  { return m_opacity; }
     const gfx::Transform& transform() const { return m_transform; }
 
 private:
     float m_opacity;
     gfx::Transform m_transform;
 };
 
 int addOpacityTransitionToController(cc::LayerAnimationController&, double duration, float startOpacity, float endOpacity, bool useTimingFunction);
 int addAnimatedTransformToController(cc::LayerAnimationController&, double duration, int deltaX, int deltaY);
 
 int addOpacityTransitionToLayer(cc::Layer&, double duration, float startOpacity, float endOpacity, bool useTimingFunction);
 int addOpacityTransitionToLayer(cc::LayerImpl&, double duration, float startOpacity, float endOpacity, bool useTimingFunction);
 
 int addAnimatedTransformToLayer(cc::Layer&, double duration, int deltaX, int deltaY);
 int addAnimatedTransformToLayer(cc::LayerImpl&, double duration, int deltaX, int deltaY);
 
 }  // namespace cc
 
 #endif  // CC_TEST_ANIMATION_TEST_COMMON_H_