Remove page id from ViewHostMsg_UpdateTargetURL; no one actually uses it on the browser side.

chrome/browser/ui/browser.h

 // Copyright (c) 2012 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_BROWSER_H_
 #define CHROME_BROWSER_UI_BROWSER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 542 matching lines @@
                               bool* was_blocked) OVERRIDE;
   virtual void ActivateContents(content::WebContents* contents) OVERRIDE;
   virtual void DeactivateContents(content::WebContents* contents) OVERRIDE;
   virtual void LoadingStateChanged(content::WebContents* source,
                                    bool to_different_document) OVERRIDE;
   virtual void CloseContents(content::WebContents* source) OVERRIDE;
   virtual void MoveContents(content::WebContents* source,
                             const gfx::Rect& pos) OVERRIDE;
   virtual bool IsPopupOrPanel(
       const content::WebContents* source) const OVERRIDE;
-  virtual void UpdateTargetURL(content::WebContents* source, int32 page_id,
+  virtual void UpdateTargetURL(content::WebContents* source,
                                const GURL& url) OVERRIDE;
   virtual void ContentsMouseEvent(content::WebContents* source,
                                   const gfx::Point& location,
                                   bool motion) OVERRIDE;
   virtual void ContentsZoomChange(bool zoom_in) OVERRIDE;
   virtual void WebContentsFocused(content::WebContents* content) OVERRIDE;
   virtual bool TakeFocus(content::WebContents* source, bool reverse) OVERRIDE;
   virtual gfx::Rect GetRootWindowResizerRect() const OVERRIDE;
   virtual void BeforeUnloadFired(content::WebContents* source,
                                  bool proceed,
@@ skipping 384 matching lines @@
 
   scoped_ptr<chrome::ValidationMessageBubble> validation_message_bubble_;
 
   // The following factory is used to close the frame at a later time.
   base::WeakPtrFactory<Browser> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_H_