Move a bunch of code in content\common (as well as a few left in renderer) to the content namespace.

content/renderer/pepper/pepper_platform_context_3d_impl.h

 // Copyright (c) 2012 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 CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_CONTEXT_3D_IMPL_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_CONTEXT_3D_IMPL_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 #include "webkit/plugins/ppapi/plugin_delegate.h"
 
 #ifdef ENABLE_GPU
 
+class CommandBufferProxy;
 namespace gpu {
-
 class CommandBuffer;
-
 }  // namespace gpu
 
-class CommandBufferProxy;
+namespace content {
 class GpuChannelHost;
-class ContentGLContext;
-
-namespace content {
 
 class PepperParentContextProvider;
 
 class PlatformContext3DImpl
     : public webkit::ppapi::PluginDelegate::PlatformContext3D {
  public:
   explicit PlatformContext3DImpl(
       PepperParentContextProvider* parent_context_provider);
   virtual ~PlatformContext3DImpl();
 
@@ skipping 26 matching lines @@
   base::Closure context_lost_callback_;
   ConsoleMessageCallback console_message_callback_;
   base::WeakPtrFactory<PlatformContext3DImpl> weak_ptr_factory_;
 };
 
 }  // namespace content
 
 #endif  // ENABLE_GPU
 
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_CONTEXT_3D_IMPL_H_