Cleanup: Remove unneeded forward declarations in ppapi.

ppapi/proxy/ppb_surface_3d_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_SURFACE_3D_PROXY_H_
-#define PPAPI_PPB_SURFACE_3D_PROXY_H_
+#ifndef PPAPI_PROXY_PPB_SURFACE_3D_PROXY_H_
+#define PPAPI_PROXY_PPB_SURFACE_3D_PROXY_H_
 
 #include <vector>
 
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_graphics_3d.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/proxy/interface_proxy.h"
 #include "ppapi/proxy/proxy_non_thread_safe_ref_count.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/thunk/ppb_surface_3d_api.h"
 
-struct PPB_Surface3D_Dev;
-
 namespace ppapi {
 namespace proxy {
 
 class Context3D;
 
 class Surface3D : public ppapi::Resource,
                   public ppapi::thunk::PPB_Surface3D_API {
  public:
   explicit Surface3D(const ppapi::HostResource& host_resource);
   virtual ~Surface3D();
@@ skipping 25 matching lines @@
 
   // In the plugin, this is the current callback set for Flushes. When the
   // callback function pointer is non-NULL, we're waiting for a flush ACK.
   PP_CompletionCallback current_flush_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(Surface3D);
 };
 
 class PPB_Surface3D_Proxy : public InterfaceProxy {
  public:
-  PPB_Surface3D_Proxy(Dispatcher* dispatcher);
+  explicit PPB_Surface3D_Proxy(Dispatcher* dispatcher);
   virtual ~PPB_Surface3D_Proxy();
 
   static const Info* GetInfo();
 
   static PP_Resource CreateProxyResource(PP_Instance instance,
                                          PP_Config3D_Dev config,
                                          const int32_t* attrib_list);
 
   // InterfaceProxy implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
@@ skipping 14 matching lines @@
   void SendSwapBuffersACKToPlugin(int32_t result,
                                   const ppapi::HostResource& surface_3d);
 
   pp::CompletionCallbackFactory<PPB_Surface3D_Proxy,
                                 ProxyNonThreadSafeRefCount> callback_factory_;
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
-#endif  // PPAPI_PPB_SURFACE_3D_PROXY_H_
+#endif  // PPAPI_PROXY_PPB_SURFACE_3D_PROXY_H_