Allow animations with inactive observers to reach the Starting state

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/animation/animation.h"
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/layer_animation_controller.h"
@@ skipping 61 matching lines @@
   virtual bool IsActive() const OVERRIDE;
 
   float opacity() const  { return opacity_; }
   const gfx::Transform& transform() const { return transform_; }
 
  private:
   float opacity_;
   gfx::Transform transform_;
 };
 
+class FakeInactiveLayerAnimationValueObserver
+    : public FakeLayerAnimationValueObserver {
+ public:
+  virtual bool IsActive() const OVERRIDE;
+};
+
 int AddOpacityTransitionToController(LayerAnimationController* controller,
                                      double duration,
                                      float start_opacity,
                                      float end_opacity,
                                      bool use_timing_function);
 
 int AddAnimatedTransformToController(LayerAnimationController* controller,
                                      double duration,
                                      int delta_x,
                                      int delta_y);
@@ skipping 16 matching lines @@
                                 int delta_y);
 
 int AddAnimatedTransformToLayer(LayerImpl* layer,
                                 double duration,
                                 int delta_x,
                                 int delta_y);
 
 }  // namespace cc
 
 #endif  // CC_TEST_ANIMATION_TEST_COMMON_H_