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

content/browser/media/capture/web_contents_tracker.h

 // Copyright (c) 2013 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.
 //
 // Given a starting render_process_id and main_render_frame_id, the
 // WebContentsTracker tracks changes to the active RenderFrameHost tree during
 // the lifetime of a WebContents instance.  This is used when mirroring tab
 // video and audio so that user navigations, crashes, iframes, etc., during a
 // tab's lifetime allow the capturing code to remain active on the
 // current/latest render frame tree.
@@ skipping 90 matching lines @@
   // WebContentsObserver override to notify the client that the source size has
   // changed.
   void MainFrameWasResized(bool width_changed) override;
 
   // WebContentsObserver override to notify the client that the capture target
   // has been permanently lost.
   void WebContentsDestroyed() override;
 
   // WebContentsObserver overrides to notify the client that the capture target
   // may have changed due to a separate fullscreen widget shown/destroyed.
-  void DidShowFullscreenWidget(int routing_id) override;
-  void DidDestroyFullscreenWidget(int routing_id) override;
+  void DidShowFullscreenWidget() override;
+  void DidDestroyFullscreenWidget() override;
 
   // If true, the client is interested in the showing/destruction of fullscreen
   // RenderWidgetHosts.
   const bool track_fullscreen_rwh_;
 
   // TaskRunner corresponding to the thread that called Start().
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   // Callback to run when the target RenderWidgetHost has changed.
   ChangeCallback callback_;
 
   // Pointer to the RenderWidgetHost provided in the last run of |callback_|.
   // This is used to eliminate duplicate callback runs.
   RenderWidgetHost* last_target_;
 
   // Callback to run when the target RenderWidgetHost has resized.
   base::Closure resize_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsTracker);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_TRACKER_H_