Cleanup: Remove unneeded forward declarations in ppapi.

ppapi/proxy/ppb_var_deprecated_proxy.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 PPAPI_PPB_VAR_DEPRECATED_PROXY_H_
-#define PPAPI_PPB_VAR_DEPRECATED_PROXY_H_
+#ifndef PPAPI_PROXY_PPB_VAR_DEPRECATED_PROXY_H_
+#define PPAPI_PROXY_PPB_VAR_DEPRECATED_PROXY_H_
 
 #include <vector>
 
 #include "base/task.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/proxy/interface_proxy.h"
 
 struct PPB_Var_Deprecated;
 
 namespace ppapi {
 namespace proxy {
 
 class SerializedVar;
-class SerializedVarArray;
 class SerializedVarReceiveInput;
 class SerializedVarVectorOutParam;
 class SerializedVarVectorReceiveInput;
 class SerializedVarOutParam;
 class SerializedVarReturnValue;
 
 class PPB_Var_Deprecated_Proxy : public InterfaceProxy {
  public:
-  PPB_Var_Deprecated_Proxy(Dispatcher* dispatcher);
+  explicit PPB_Var_Deprecated_Proxy(Dispatcher* dispatcher);
   virtual ~PPB_Var_Deprecated_Proxy();
 
   static const Info* GetInfo();
 
   // InterfaceProxy implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
  private:
   // Message handlers.
   void OnMsgAddRefObject(int64 object_id, int* unused);
@@ skipping 53 matching lines @@
   base::WeakPtrFactory<PPB_Var_Deprecated_Proxy> task_factory_;
 
   const PPB_Var_Deprecated* ppb_var_impl_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_Var_Deprecated_Proxy);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
-#endif  // PPAPI_PPB_VAR_DEPRECATED_PROXY_H_
+#endif  // PPAPI_PROXY_PPB_VAR_DEPRECATED_PROXY_H_