Remove some dead code for permission bubbles.

chrome/browser/permissions/permission_bubble_request_impl.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_PERMISSIONS_PERMISSION_BUBBLE_REQUEST_IMPL_H_
 #define CHROME_BROWSER_PERMISSIONS_PERMISSION_BUBBLE_REQUEST_IMPL_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "chrome/browser/permissions/permission_request_id.h"
@@ skipping 19 matching lines @@
 
   ~PermissionBubbleRequestImpl() override;
 
  protected:
   void RegisterActionTaken() { action_taken_ = true; }
 
  private:
   // PermissionBubbleRequest:
   gfx::VectorIconId GetVectorIconId() const override;
   int GetIconId() const override;
-  base::string16 GetMessageText() const override;
   base::string16 GetMessageTextFragment() const override;
   GURL GetOrigin() const override;
   // Remember to call RegisterActionTaken for these methods if you are
   // overriding them.
   void PermissionGranted() override;
   void PermissionDenied() override;
   void Cancelled() override;
   void RequestFinished() override;
   PermissionBubbleType GetPermissionBubbleType() const override;
 
   GURL request_origin_;
   content::PermissionType permission_type_;
 
   // Called once a decision is made about the permission.
   const PermissionDecidedCallback permission_decided_callback_;
 
   // Called when the bubble is no longer in use so it can be deleted by
   // the caller.
   const base::Closure delete_callback_;
   bool is_finished_;
   bool action_taken_;
 
   DISALLOW_COPY_AND_ASSIGN(PermissionBubbleRequestImpl);
 };
 
 #endif  // CHROME_BROWSER_PERMISSIONS_PERMISSION_BUBBLE_REQUEST_IMPL_H_