Cleanup: Remove forward declarations in various chrome/browser directories.

chrome/browser/autofill/autofill_feedback_infobar_delegate.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_BROWSER_AUTOFILL_AUTOFILL_FEEDBACK_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_AUTOFILL_AUTOFILL_FEEDBACK_INFOBAR_DELEGATE_H_
 #pragma once
 
+#include <string>
+
 #include "base/basictypes.h"
 #include "base/string16.h"
 #include "chrome/browser/tab_contents/link_infobar_delegate.h"
 #include "webkit/glue/window_open_disposition.h"
 
-class TabContents;
-
 // An InfoBar delegate that prompts the user to provide additional feedback for
 // the Autofill developers.
 class AutofillFeedbackInfoBarDelegate : public LinkInfoBarDelegate {
  public:
   AutofillFeedbackInfoBarDelegate(InfoBarTabHelper* infobar_helper,
                                   const string16& message,
                                   const string16& link_text,
                                   const std::string& feedback_message);
 
  private:
@@ skipping 11 matching lines @@
   // The default feedback message, which can be edited by the user prior to
   // submission.
   const std::string feedback_message_;
 
   bool link_clicked_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillFeedbackInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_AUTOFILL_AUTOFILL_FEEDBACK_INFOBAR_DELEGATE_H_