Revert of Move gpu memory calculations to Compositor.

components/mus/public/cpp/context_provider.h

 // Copyright 2014 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 COMPONENTS_MUS_PUBLIC_CPP_CONTEXT_PROVIDER_H_
 #define COMPONENTS_MUS_PUBLIC_CPP_CONTEXT_PROVIDER_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
@@ skipping 12 matching lines @@
   gpu::gles2::GLES2Interface* ContextGL() override;
   gpu::ContextSupport* ContextSupport() override;
   class GrContext* GrContext() override;
   void InvalidateGrContext(uint32_t state) override;
   void SetupLock() override;
   base::Lock* GetLock() override;
   Capabilities ContextCapabilities() override;
   void DeleteCachedResources() override {}
   void SetLostContextCallback(
       const LostContextCallback& lost_context_callback) override {}
+  void SetMemoryPolicyChangedCallback(
+      const MemoryPolicyChangedCallback& memory_policy_changed_callback)
+      override {}
 
  protected:
   friend class base::RefCountedThreadSafe<ContextProvider>;
   ~ContextProvider() override;
 
  private:
   static void ContextLostThunk(void* closure) {
     static_cast<ContextProvider*>(closure)->ContextLost();
   }
   void ContextLost();
 
   cc::ContextProvider::Capabilities capabilities_;
   mojo::ScopedMessagePipeHandle command_buffer_handle_;
   MojoGLES2Context context_;
   scoped_ptr<gpu::gles2::GLES2Interface> context_gl_;
 
   base::Lock context_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(ContextProvider);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_CONTEXT_PROVIDER_H_