Remove dead code since PDFWebContentsHelper::ShowOpenInReaderPrompt isn't called anymore.

chrome/browser/ui/location_bar/location_bar.h

 // Copyright 2014 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_LOCATION_BAR_LOCATION_BAR_H_
 #define CHROME_BROWSER_UI_LOCATION_BAR_LOCATION_BAR_H_
 
 #include <stddef.h>
 
 #include "base/macros.h"
@@ skipping 58 matching lines @@
   // Updates the visibility of the location bar. Animates the transition if
   // |animate| is true.
   virtual void UpdateLocationBarVisibility(bool visible, bool animate) = 0;
 
   // Shows the popup for the given |extension| and, if |grant_active_tab| is
   // true, grants the extension active tab permissions.
   // Returns true if a popup was shown.
   virtual bool ShowPageActionPopup(const extensions::Extension* extension,
                                    bool grant_active_tab) = 0;
 
-  // Updates the state of the button to open a PDF in Adobe Reader.
-  virtual void UpdateOpenPDFInReaderPrompt() = 0;
-
   // Saves the state of the location bar to the specified WebContents, so that
   // it can be restored later. (Done when switching tabs).
   virtual void SaveStateToContents(content::WebContents* contents) = 0;
 
   // Reverts the location bar.  The bar's permanent text will be shown.
   virtual void Revert() = 0;
 
   virtual const OmniboxView* GetOmniboxView() const = 0;
   virtual OmniboxView* GetOmniboxView() = 0;
 
@@ skipping 38 matching lines @@
   virtual void TestPageActionPressed(size_t index) = 0;
 
   // Returns whether or not the bookmark star decoration is visible.
   virtual bool GetBookmarkStarVisibility() = 0;
 
  protected:
   virtual ~LocationBarTesting() {}
 };
 
 #endif  // CHROME_BROWSER_UI_LOCATION_BAR_LOCATION_BAR_H_