Fixes to Cast use of overlays for video frames

chromecast/media/cma/filters/hole_frame_factory.cc

Index: chromecast/media/cma/filters/hole_frame_factory.cc
diff --git a/chromecast/media/cma/filters/hole_frame_factory.cc b/chromecast/media/cma/filters/hole_frame_factory.cc
index dfb9a33b0f208e1177e88675aacdfd5c5e2caca2..d5e2c07c1666aa0af2d9b04a1167f7638e7f4985 100644
--- a/chromecast/media/cma/filters/hole_frame_factory.cc
+++ b/chromecast/media/cma/filters/hole_frame_factory.cc
@@ -36,6 +36,8 @@ HoleFrameFactory::HoleFrameFactory(
 
     gl->GenMailboxCHROMIUM(mailbox_.name);
     gl->ProduceTextureDirectCHROMIUM(texture_, GL_TEXTURE_2D, mailbox_.name);
+
+    sync_point_ = gl->InsertSyncPointCHROMIUM();
   }
 }
 
@@ -61,7 +63,7 @@ scoped_refptr<::media::VideoFrame> HoleFrameFactory::CreateHoleFrame(
   scoped_refptr<::media::VideoFrame> frame =
       ::media::VideoFrame::WrapNativeTexture(
           ::media::VideoFrame::XRGB,
-          gpu::MailboxHolder(mailbox_, GL_TEXTURE_2D, 0),
+          gpu::MailboxHolder(mailbox_, GL_TEXTURE_2D, sync_point_),
           ::media::VideoFrame::ReleaseMailboxCB(),
           size,                // coded_size
           gfx::Rect(size),     // visible rect