cc: Cleanup class/struct forward declarations

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 <stddef.h>
 #include <stdint.h>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "cc/base/cc_export.h"
 #include "cc/output/context_cache_controller.h"
 #include "gpu/command_buffer/common/capabilities.h"
 
 class GrContext;
 
 namespace base {
 class Lock;
 }
 
 namespace gpu {
 class ContextSupport;
 namespace gles2 { class GLES2Interface; }
 }
 
 namespace cc {
-struct ManagedMemoryPolicy;
 
 class ContextProvider : public base::RefCountedThreadSafe<ContextProvider> {
  public:
   // Hold an instance of this lock while using a context across multiple
   // threads. This only works for ContextProviders that will return a valid
   // lock from GetLock(), so is not always supported. Most use of
   // ContextProvider should be single-thread only on the thread that
   // BindToCurrentThread is run on.
   class CC_EXPORT ScopedContextLock {
    public:
@@ skipping 52 matching lines @@
   virtual base::Lock* GetLock() = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<ContextProvider>;
   virtual ~ContextProvider() {}
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_CONTEXT_PROVIDER_H_