Revert of Move gpu memory calculations to Compositor.

cc/output/context_provider.h

 // Copyright (c) 2013 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_OUTPUT_CONTEXT_PROVIDER_H_
 #define CC_OUTPUT_CONTEXT_PROVIDER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
@@ skipping 76 matching lines @@
   // Delete all cached gpu resources.
   virtual void DeleteCachedResources() = 0;
 
   // Sets a callback to be called when the context is lost. This should be
   // called from the same thread that the context is bound to. To avoid races,
   // it should be called before BindToCurrentThread().
   typedef base::Closure LostContextCallback;
   virtual void SetLostContextCallback(
       const LostContextCallback& lost_context_callback) = 0;
 
+  // Sets a callback to be called when the memory policy changes. This should be
+  // called from the same thread that the context is bound to.
+  typedef base::Callback<void(const ManagedMemoryPolicy& policy)>
+      MemoryPolicyChangedCallback;
+  virtual void SetMemoryPolicyChangedCallback(
+      const MemoryPolicyChangedCallback& memory_policy_changed_callback) = 0;
+
  protected:
   friend class base::RefCountedThreadSafe<ContextProvider>;
   virtual ~ContextProvider() {}
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_CONTEXT_PROVIDER_H_