HW Video: Make media::VideoFrame handle the sync point of the compositor as well as webgl

media/base/video_frame_unittest.cc

Index: media/base/video_frame_unittest.cc
diff --git a/media/base/video_frame_unittest.cc b/media/base/video_frame_unittest.cc
index 05465d9b09dc1ec28751511bf97d205a71635378..243056b3558d5d2fdacee57b6abcee07ffe722f7 100644
--- a/media/base/video_frame_unittest.cc
+++ b/media/base/video_frame_unittest.cc
@@ -265,8 +265,14 @@ TEST(VideoFrame, TextureNoLongerNeededCallbackAfterTakingAndReleasingMailbox) {
     EXPECT_EQ(sync_point, mailbox_holder->sync_point);
 
     // Finish using the mailbox_holder and drop our reference.
+    uint32 previous_sync_point = 0;
+    sync_point = 1;
+    EXPECT_EQ(previous_sync_point, frame->SwapReleaseSyncPoint(sync_point));
+    // The last sync point will be used.
+    previous_sync_point = sync_point;
     sync_point = 10;
-    mailbox_holder->sync_point = sync_point;
+    EXPECT_EQ(previous_sync_point, frame->SwapReleaseSyncPoint(sync_point));
+
   }
   EXPECT_EQ(sync_point, called_sync_point);
 }