Cleanup: Remove unneeded forward declarations in webkit/plugins/.

webkit/plugins/ppapi/plugin_module.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.
 
 #ifndef WEBKIT_PLUGINS_PPAPI_PLUGIN_MODULE_H_
 #define WEBKIT_PLUGINS_PPAPI_PLUGIN_MODULE_H_
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/native_library.h"
 #include "base/process.h"
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/ppb.h"
 #include "webkit/plugins/ppapi/plugin_delegate.h"
 
 class FilePath;
-class MessageLoop;
 struct PPB_Core;
-struct PPB_Memory_Dev;
 typedef void* NPIdentifier;
 
-namespace base {
-class WaitableEvent;
-}
-
 namespace ppapi {
 class WebKitForwarding;
 }  // namespace ppapi
 
-namespace pp {
-namespace proxy {
-class HostDispatcher;
-}  // namespace proxy
-}  // namespace pp
-
-namespace IPC {
-struct ChannelHandle;
-}
-
 namespace webkit {
 namespace ppapi {
 
 class CallbackTracker;
 class PluginDelegate;
 class PluginInstance;
 
 // Represents one plugin library loaded into one renderer. This library may
 // have multiple instances.
 //
@@ skipping 154 matching lines @@
   // Lazily created by GetWebKitForwarding.
   scoped_ptr< ::ppapi::WebKitForwarding> webkit_forwarding_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginModule);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PLUGIN_MODULE_H_