iwyu: Use callback_old.h where appropriate, part 2.

content/renderer/renderer_gl_context.h

 // Copyright (c) 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.
 
 // This API is consistent with other OpenGL setup APIs like window's WGL
 // and pepper's PGL. This API is used to manage OpenGL RendererGLContexts in the
 // Chrome renderer process in a way that is consistent with other platforms.
 
 #ifndef CONTENT_RENDERER_RENDERER_GL_CONTEXT_H_
 #define CONTENT_RENDERER_RENDERER_GL_CONTEXT_H_
 #pragma once
 
-#include "base/callback.h"
+#include "base/callback_old.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "build/build_config.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 
 class GpuChannelHost;
 class MessageLoop;
 class CommandBufferProxy;
@@ skipping 205 matching lines @@
   gpu::gles2::GLES2CmdHelper* gles2_helper_;
   int32 transfer_buffer_id_;
   gpu::gles2::GLES2Implementation* gles2_implementation_;
   gfx::Size size_;
   Error last_error_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererGLContext);
 };
 
 #endif  // CONTENT_RENDERER_RENDERER_GL_CONTEXT_H_