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

content/browser/media/capture/web_contents_tracker.cc

Index: content/browser/media/capture/web_contents_tracker.cc
diff --git a/content/browser/media/capture/web_contents_tracker.cc b/content/browser/media/capture/web_contents_tracker.cc
index 01bc9b0b4613753d3748fc9b2f02d9d1de90a17f..38cc6b5d24ecd3916ed6326f20c0c1828c22c7c7 100644
--- a/content/browser/media/capture/web_contents_tracker.cc
+++ b/content/browser/media/capture/web_contents_tracker.cc
@@ -163,11 +163,11 @@ void WebContentsTracker::WebContentsDestroyed() {
   OnPossibleTargetChange(false);
 }
 
-void WebContentsTracker::DidShowFullscreenWidget(int routing_id) {
+void WebContentsTracker::DidShowFullscreenWidget() {
   OnPossibleTargetChange(false);
 }
 
-void WebContentsTracker::DidDestroyFullscreenWidget(int routing_id) {
+void WebContentsTracker::DidDestroyFullscreenWidget() {
   OnPossibleTargetChange(false);
 }