Remove unused routing ID param from Did(Show|Destroy)FullscreenWidget.

chrome/browser/extensions/api/tab_capture/offscreen_tab.h

 // Copyright 2015 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_EXTENSIONS_API_TAB_CAPTURE_OFFSCREEN_TAB_H_
 #define CHROME_BROWSER_EXTENSIONS_API_TAB_CAPTURE_OFFSCREEN_TAB_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 149 matching lines @@
       const content::WebContents* contents) const final;
   void RequestMediaAccessPermission(
       content::WebContents* contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback) final;
   bool CheckMediaAccessPermission(content::WebContents* contents,
                                   const GURL& security_origin,
                                   content::MediaStreamType type) final;
 
   // content::WebContentsObserver overrides
-  void DidShowFullscreenWidget(int routing_id) final;
+  void DidShowFullscreenWidget() final;
 
  private:
   bool in_fullscreen_mode() const {
     return !non_fullscreen_size_.IsEmpty();
   }
 
   // Called by |capture_poll_timer_| to automatically destroy this OffscreenTab
   // when the capturer count returns to zero.
   void DieIfContentCaptureEnded();
 
@@ skipping 29 matching lines @@
   // This is false until after the Start() method is called, and capture of the
   // |offscreen_tab_web_contents_| is first detected.
   bool content_capture_was_detected_;
 
   DISALLOW_COPY_AND_ASSIGN(OffscreenTab);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_TAB_CAPTURE_OFFSCREEN_TAB_H_