WIP: Option2: Android media: VideoFrame should not store so many sync points.

media/base/video_frame.cc

Index: media/base/video_frame.cc
diff --git a/media/base/video_frame.cc b/media/base/video_frame.cc
index 089af93c0c88d11e68e5583fc94ac5163a9f6cca..7fc3fe669d240addb859fe9b61b26c9050aa244b 100644
--- a/media/base/video_frame.cc
+++ b/media/base/video_frame.cc
@@ -604,10 +604,10 @@ VideoFrame::VideoFrame(VideoFrame::Format format,
 
 VideoFrame::~VideoFrame() {
   if (!mailbox_holder_release_cb_.is_null()) {
-    std::vector<uint32> release_sync_points;
+    std::map<std::string, uint32> release_sync_points;
     {
       base::AutoLock locker(release_sync_point_lock_);
-      release_sync_points_.swap(release_sync_points);
+      release_sync_point_map_.swap(release_sync_points);
     }
     base::ResetAndReturn(&mailbox_holder_release_cb_).Run(release_sync_points);
   }
@@ -707,12 +707,12 @@ base::SharedMemoryHandle VideoFrame::shared_memory_handle() const {
   return shared_memory_handle_;
 }
 
-void VideoFrame::AppendReleaseSyncPoint(uint32 sync_point) {
+void VideoFrame::AppendReleaseSyncPoint(std::string client, uint32 sync_point) {
   DCHECK_EQ(format_, NATIVE_TEXTURE);
   if (!sync_point)
     return;
   base::AutoLock locker(release_sync_point_lock_);
-  release_sync_points_.push_back(sync_point);
+  release_sync_point_map_[client] = sync_point;
 }
 
 #if defined(OS_POSIX)