Cleanup: Remove unneeded forward declarations in ppapi.

ppapi/proxy/ppp_class_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_PROXY_PPP_CLASS_PROXY_H_
 #define PPAPI_PROXY_PPP_CLASS_PROXY_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/proxy/interface_proxy.h"
 
 struct PPB_Var_Deprecated;
-struct PPP_Class_Deprecated;
 
 namespace ppapi {
 namespace proxy {
 
 class SerializedVar;
 class SerializedVarReceiveInput;
 class SerializedVarVectorReceiveInput;
 class SerializedVarOutParam;
 class SerializedVarReturnValue;
 
 class PPP_Class_Proxy : public InterfaceProxy {
  public:
   // PPP_Class isn't a normal interface that you can query for, so this
   // constructor doesn't take an interface pointer.
-  PPP_Class_Proxy(Dispatcher* dispatcher);
+  explicit PPP_Class_Proxy(Dispatcher* dispatcher);
   virtual ~PPP_Class_Proxy();
 
   // Factory function used for registration (normal code can just use the
   // constructor).
   static InterfaceProxy* Create(Dispatcher* dispatcher);
 
   // Creates a proxied object in the browser process. This takes the browser's
   // PPB_Var_Deprecated interface to use to create the object. The class and
   static PP_Var CreateProxiedObject(const PPB_Var_Deprecated* var,
                                     Dispatcher* dispatcher,
@@ skipping 45 matching lines @@
                       SerializedVarReturnValue result);
   void OnMsgDeallocate(int64 ppp_class, int64 object);
 
   DISALLOW_COPY_AND_ASSIGN(PPP_Class_Proxy);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PPP_CLASS_PROXY_H_