Allow animations with inactive observers to reach the Starting state

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 146 matching lines @@
 
 void FakeLayerAnimationValueObserver::OnTransformAnimated(
     const gfx::Transform& transform) {
   transform_ = transform;
 }
 
 bool FakeLayerAnimationValueObserver::IsActive() const {
   return true;
 }
 
+bool FakeInactiveLayerAnimationValueObserver::IsActive() 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 start_opacity,
                                      float end_opacity,
                                      bool use_timing_function) {
@@ skipping 49 matching lines @@
                                 double duration,
                                 int delta_x,
                                 int delta_y) {
   return AddAnimatedTransform(layer->layer_animation_controller(),
                               duration,
                               delta_x,
                               delta_y);
 }
 
 }  // namespace cc