Revert of Don't use webmediaplayer to inform webview about fullscreen change

content/renderer/media/android/webmediaplayer_android.cc

Index: content/renderer/media/android/webmediaplayer_android.cc
diff --git a/content/renderer/media/android/webmediaplayer_android.cc b/content/renderer/media/android/webmediaplayer_android.cc
index 41c3eceb396fead4c1c434a5af660707924af673..9c230c1cdd902151860d1ac8e1404b4f10ae86d2 100644
--- a/content/renderer/media/android/webmediaplayer_android.cc
+++ b/content/renderer/media/android/webmediaplayer_android.cc
@@ -757,6 +757,8 @@
 
 void WebMediaPlayerAndroid::OnDidEnterFullscreen() {
   if (!manager_->IsInFullscreen(frame_)) {
+    frame_->view()->willEnterFullScreen();
+    frame_->view()->didEnterFullScreen();
     manager_->DidEnterFullscreen(frame_);
   }
 }
@@ -775,6 +777,8 @@
     manager_->RequestExternalSurface(player_id_, last_computed_rect_);
 #endif  // defined(VIDEO_HOLE)
 
+  frame_->view()->willExitFullScreen();
+  frame_->view()->didExitFullScreen();
   manager_->DidExitFullscreen();
   client_->repaint();
 }