Use an auxiliary list of animation controllers.

cc/proxy.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_PROXY_H_
 #define CC_PROXY_H_
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/time.h"
@@ skipping 63 matching lines @@
     virtual const RendererCapabilities& rendererCapabilities() const = 0;
 
     virtual void setNeedsAnimate() = 0;
     virtual void setNeedsCommit() = 0;
     virtual void setNeedsRedraw() = 0;
 
     // Defers commits until it is reset. It is only supported when in threaded mode. It's an error to make a sync call
     // like compositeAndReadback while commits are deferred.
     virtual void setDeferCommits(bool) = 0;
 
-    virtual void didAddAnimation() = 0;
-
     virtual bool commitRequested() const = 0;
 
     virtual void start() = 0; // Must be called before using the proxy.
     virtual void stop() = 0; // Must be called before deleting the proxy.
 
     // Forces 3D commands on all contexts to wait for all previous SwapBuffers to finish before executing in the GPU
     // process.
     virtual void forceSerializeOnSwapBuffers() = 0;
 
     // Maximum number of sub-region texture updates supported for each commit.
@@ skipping 42 matching lines @@
 class DebugScopedSetMainThreadBlocked {
 public:
     explicit DebugScopedSetMainThreadBlocked(Proxy*) { }
     ~DebugScopedSetMainThreadBlocked() { }
 };
 #endif
 
 }
 
 #endif  // CC_PROXY_H_