janitorial: clean up unnecessary includes in src/chrome/renderer.

chrome/renderer/webplugin_delegate_proxy.h

 // Copyright (c) 2006-2008 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 CHROME_RENDERER_WEBPLUGIN_DELEGATE_PROXY_H__
 #define CHROME_RENDERER_WEBPLUGIN_DELEGATE_PROXY_H__
 
-#include <set>
 #include <string>
 
 #include "base/gfx/rect.h"
 #include "base/ref_counted.h"
-#include "base/scoped_handle.h"
 #include "chrome/common/ipc_message.h"
-#include "chrome/plugin/npobject_stub.h"
 #include "chrome/renderer/plugin_channel_host.h"
 #include "webkit/glue/webplugin.h"
 #include "webkit/glue/webplugin_delegate.h"
 
 class GURL;
 struct PluginHostMsg_URLRequest_Params;
+class NPObjectStub;
 class RenderView;
 class SkBitmap;
 
 namespace base {
 class SharedMemory;
 class WaitableEvent;
 }
 
 namespace skia {
 class PlatformCanvasWin;
@@ skipping 156 matching lines @@
   scoped_ptr<skia::PlatformCanvasWin> transport_store_canvas_;
   scoped_ptr<base::SharedMemory> background_store_;
   scoped_ptr<skia::PlatformCanvasWin> background_store_canvas_;
   // This lets us know which portion of the backing store has been painted into.
   gfx::Rect backing_store_painted_;
 
   DISALLOW_EVIL_CONSTRUCTORS(WebPluginDelegateProxy);
 };
 
 #endif  // CHROME_RENDERER_WEBPLUGIN_DELEGATE_PROXY_H_