Get rid of a bunch of view_messages.h includes from chrome by making the TabContentsObserver inte...

chrome/browser/ui/constrained_window_tab_helper.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_UI_CONSTRAINED_WINDOW_TAB_HELPER_H_
 #define CHROME_BROWSER_UI_CONSTRAINED_WINDOW_TAB_HELPER_H_
 #pragma once
 
 #include <deque>
 
@@ skipping 37 matching lines @@
 
   // Return an iterator for the last constrained window in this tab contents.
   ConstrainedWindowList::iterator constrained_window_end() {
     return child_windows_.end();
   }
 
  private:
   // Overridden from TabContentsObserver:
   virtual void DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
-      const ViewHostMsg_FrameNavigate_Params& params) OVERRIDE;
+      const content::FrameNavigateParams& params) OVERRIDE;
   virtual void DidGetIgnoredUIEvent() OVERRIDE;
   virtual void TabContentsDestroyed(TabContents* tab) OVERRIDE;
 
   // Our owning TabContentsWrapper.
   TabContentsWrapper* wrapper_;
 
   // Delegate for notifying our owner about stuff. Not owned by us.
   ConstrainedWindowTabHelperDelegate* delegate_;
 
   // All active constrained windows.
   ConstrainedWindowList child_windows_;
 
   DISALLOW_COPY_AND_ASSIGN(ConstrainedWindowTabHelper);
 };
 
 #endif  // CHROME_BROWSER_UI_CONSTRAINED_WINDOW_TAB_HELPER_H_