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

media/base/video_frame_unittest.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 "media/base/video_frame.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/format_macros.h"
 #include "base/memory/aligned_memory.h"
@@ skipping 247 matching lines @@
         base::TimeDelta(),                         // timestamp
         base::Callback<void(const SkBitmap&)>());  // read_pixels_cb
 
     gpu::MailboxHolder* mailbox_holder = frame->mailbox_holder();
 
     EXPECT_EQ(mailbox.name[0], mailbox_holder->mailbox.name[0]);
     EXPECT_EQ(target, mailbox_holder->texture_target);
     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);
 }
 
 }  // namespace media