Cleanup: Remove unneeded forward declarations in ppapi.

ppapi/proxy/ppb_text_input_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_TEXT_INPUT_PROXY_H_
-#define PPAPI_PPB_TEXT_INPUT_PROXY_H_
+#ifndef PPAPI_PROXY_PPB_TEXT_INPUT_PROXY_H_
+#define PPAPI_PROXY_PPB_TEXT_INPUT_PROXY_H_
 
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_rect.h"
 #include "ppapi/proxy/interface_proxy.h"
 #include "ppapi/thunk/ppb_text_input_api.h"
 
-struct PPB_TextInput_Dev;
-
 namespace ppapi {
 namespace proxy {
 
 class PPB_TextInput_Proxy
     : public InterfaceProxy,
       public ppapi::thunk::PPB_TextInput_FunctionAPI {
  public:
-  PPB_TextInput_Proxy(Dispatcher* dispatcher);
+  explicit PPB_TextInput_Proxy(Dispatcher* dispatcher);
   virtual ~PPB_TextInput_Proxy();
 
   // FunctionGroupBase overrides.
   ppapi::thunk::PPB_TextInput_FunctionAPI* AsPPB_TextInput_FunctionAPI()
       OVERRIDE;
 
   // PPB_TextInput_FunctionAPI implementation.
   virtual void SetTextInputType(PP_Instance instance,
                                 PP_TextInput_Type type) OVERRIDE;
   virtual void UpdateCaretPosition(PP_Instance instance,
@@ skipping 13 matching lines @@
                                 PP_Rect caret,
                                 PP_Rect bounding_box);
   void OnMsgCancelCompositionText(PP_Instance instance);
 
   DISALLOW_COPY_AND_ASSIGN(PPB_TextInput_Proxy);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
-#endif  // PPAPI_PPB_TEXT_INPUT_PROXY_H_
+#endif  // PPAPI_PROXY_PPB_TEXT_INPUT_PROXY_H_