Cleanup some forward declared structs that are not being used.

chrome/common/temp_scaffolding_stubs.h

 // Copyright (c) 2009 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 CHROME_COMMON_TEMP_SCAFFOLDING_STUBS_H_
 #define CHROME_COMMON_TEMP_SCAFFOLDING_STUBS_H_
 
 // This file provides declarations and stub definitions for classes we encouter
 // during the porting effort. It is not meant to be permanent, and classes will
 // be removed from here as they are fleshed out more completely.
@@ skipping 57 matching lines @@
 class TabContents;
 struct ThumbnailScore;
 class Task;
 class TemplateURL;
 class TemplateURLRef;
 class URLRequest;
 class URLRequestContext;
 class UserScriptMaster;
 class VisitedLinkMaster;
 class WebContents;
+struct WebPluginGeometry;
 class WebPreferences;
 
 namespace IPC {
 class Message;
 }
 
 namespace net {
 class AuthChallengeInfo;
 class IOBuffer;
 class X509Certificate;
@@ skipping 335 matching lines @@
  public:
   void Init() { NOTIMPLEMENTED(); }
 };
 
 }  // namespace sandbox
 
 class IconManager {
 };
 
 struct ViewHostMsg_DidPrintPage_Params;
-struct ViewHostMsg_FrameNavigate_Params;
 
 class DebuggerWrapper : public base::RefCountedThreadSafe<DebuggerWrapper> {
  public:
   explicit DebuggerWrapper(int port) {}
   void DebugMessage(const std::wstring&) {}
   void OnDebugAttach() {}
   void OnDebugDisconnect() {}
 };
 
 namespace views {
@@ skipping 701 matching lines @@
                                 int render_view_id);
 }
 
 class RepostFormWarningDialog {
  public:
   static void RunRepostFormWarningDialog(NavigationController*) { }
   virtual ~RepostFormWarningDialog() { }
 };
 
 #endif  // CHROME_COMMON_TEMP_SCAFFOLDING_STUBS_H_