cc: Avoid updating animations in the background without an active tree

cc/test/layer_tree_test.h

 // Copyright 2011 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_LAYER_TREE_TEST_H_
 #define CC_TEST_LAYER_TREE_TEST_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread.h"
 #include "cc/animation/animation_delegate.h"
@@ skipping 50 matching lines @@
   virtual void DidFailToInitializeOutputSurface() {}
   virtual void DidAddAnimation() {}
   virtual void WillCommit() {}
   virtual void DidCommit() {}
   virtual void DidCommitAndDrawFrame() {}
   virtual void DidCompleteSwapBuffers() {}
   virtual void ScheduleComposite() {}
   virtual void DidDeferCommit() {}
   virtual void DidSetVisibleOnImplTree(LayerTreeHostImpl* host_impl,
                                        bool visible) {}
+  virtual base::TimeDelta LowFrequencyAnimationInterval() const;
 
   // Implementation of AnimationDelegate:
   virtual void NotifyAnimationStarted(double time) OVERRIDE {}
   virtual void NotifyAnimationFinished(double time) OVERRIDE {}
 
   virtual scoped_ptr<OutputSurface> CreateOutputSurface(bool fallback) = 0;
   virtual scoped_refptr<cc::ContextProvider>
   OffscreenContextProviderForMainThread() = 0;
   virtual scoped_refptr<cc::ContextProvider>
       OffscreenContextProviderForCompositorThread() = 0;
@@ skipping 155 matching lines @@
 
 #define SINGLE_AND_MULTI_THREAD_DELEGATING_RENDERER_TEST_F(TEST_FIXTURE_NAME) \
   SINGLE_THREAD_DELEGATING_RENDERER_TEST_F(TEST_FIXTURE_NAME);                \
   MULTI_THREAD_DELEGATING_RENDERER_TEST_F(TEST_FIXTURE_NAME)
 
 #define SINGLE_AND_MULTI_THREAD_TEST_F(TEST_FIXTURE_NAME) \
   SINGLE_AND_MULTI_THREAD_DIRECT_RENDERER_TEST_F(TEST_FIXTURE_NAME);    \
   SINGLE_AND_MULTI_THREAD_DELEGATING_RENDERER_TEST_F(TEST_FIXTURE_NAME)
 
 #endif  // CC_TEST_LAYER_TREE_TEST_H_