Implementation of MediaCodecPlayer stage 1

media/base/android/media_player_android.cc

Index: media/base/android/media_player_android.cc
diff --git a/media/base/android/media_player_android.cc b/media/base/android/media_player_android.cc
index 60e1dfc0f823268042381b5e4514931290c3d2b8..2ca4c9f89abccdff6428bebaa5d60d83f6330c9b 100644
--- a/media/base/android/media_player_android.cc
+++ b/media/base/android/media_player_android.cc
@@ -24,8 +24,9 @@ MediaPlayerAndroid::MediaPlayerAndroid(
       frame_url_(frame_url),
       is_audible_(false),
       weak_factory_(this) {
+  weak_ptr_for_ui_thread_ =  weak_factory_.GetWeakPtr();
   listener_.reset(new MediaPlayerListener(base::ThreadTaskRunnerHandle::Get(),
-                                          weak_factory_.GetWeakPtr()));
+                                          weak_ptr_for_ui_thread_));
 }
 
 MediaPlayerAndroid::~MediaPlayerAndroid() {}
@@ -88,6 +89,7 @@ void MediaPlayerAndroid::DetachListener() {
 
 void MediaPlayerAndroid::DestroyListenerOnUIThread() {
   weak_factory_.InvalidateWeakPtrs();
+  weak_ptr_for_ui_thread_.reset();
   listener_.reset();
 }