Adding progresss bar when loading fullscreen video

content/browser/android/content_video_view.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/android/content_video_view.h"
 
 #include "base/android/jni_android.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "content/browser/android/media_player_manager_android.h"
@@ skipping 121 matching lines @@
 }
 
 void ContentVideoView::SetSurface(JNIEnv* env, jobject obj,
                                   jobject surface) {
   manager_->SetVideoSurface(surface);
   ReleaseSurface(surface);
 }
 
 void ContentVideoView::UpdateMediaMetadata(JNIEnv* env, jobject obj) {
   media::MediaPlayerBridge* player = manager_->GetFullscreenPlayer();
-  if (player)
+  if (player && player->prepared())
     Java_ContentVideoView_updateMediaMetadata(
         env, obj, player->GetVideoWidth(), player->GetVideoHeight(),
         player->GetDuration().InMilliseconds(), player->can_pause(),
         player->can_seek_forward(), player->can_seek_backward());
 }
 
 } // namespace content