Cleanup: Remove forward declarations in various directories.

chrome_frame/external_tab.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 CHROME_FRAME_EXTERNAL_TAB_H_
 #define CHROME_FRAME_EXTERNAL_TAB_H_
 #pragma once
 
 #include <windows.h>
 #include <atlbase.h>
 #include <atlwin.h>
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
 #include "base/win/scoped_comptr.h"
 #include "chrome/common/automation_constants.h"
 #include "chrome_frame/cfproxy.h"
 #include "chrome_frame/task_marshaller.h"
 #include "content/public/common/page_zoom.h"
 #include "googleurl/src/gurl.h"
 
+struct AttachExternalTabParams;
+struct AutomationURLRequest;
+struct ContextMenuModel;
+struct MiniContextMenuParams;
+struct NavigationInfo;
 class Task;
-class CancelableTask;
 
 namespace base {
-class TimeDelta;
 class WaitableEvent;
 }
 
-namespace IPC {
-struct NavigationInfo;
-}
-
 namespace gfx {
 class Rect;
 }
 
+namespace net {
+class URLRequestStatus;
+}
 
 // This is the delegate/callback interface that has to be implemented
 // by the customers of ExternalTabProxy class.
 class UIDelegate {
  public:
   virtual void OnNavigationStateChanged(
       int flags, const NavigationInfo& nav_info) = 0;
   virtual void OnUpdateTargetUrl(const std::wstring& new_target_url) = 0;
   virtual void OnLoad(const GURL& url) = 0;
   virtual void OnMoveWindow(const gfx::Rect& pos) = 0;
@@ skipping 167 matching lines @@
     GURL url;
     GURL referrer;
     void Set(const GURL& gurl, const GURL& ref) {
       url = gurl;
       referrer = ref;
     }
   } pending_navigation_;
 };
 
 #endif  // CHROME_FRAME_EXTERNAL_TAB_H_