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

components/pdf/browser/pdf_web_contents_helper_client.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 COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_CLIENT_H_
 #define COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_CLIENT_H_
 
 #include "base/callback.h"
 #include "base/strings/string16.h"
 #include "ipc/ipc_message.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace pdf {
 
 class PDFWebContentsHelperClient {
  public:
   virtual ~PDFWebContentsHelperClient() {}
 
-  virtual void UpdateLocationBar(content::WebContents* contents) = 0;
-
   virtual void UpdateContentRestrictions(content::WebContents* contents,
                                          int content_restrictions) = 0;
 
   virtual void OnPDFHasUnsupportedFeature(content::WebContents* contents) = 0;
 
   virtual void OnSaveURL(content::WebContents* contents) = 0;
 };
 
 }  // namespace pdf
 
 #endif  // COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_CLIENT_H_