Send compositor frame IPC with metadata.

cc/gl_frame_data.cc

Index: cc/gl_frame_data.cc
diff --git a/cc/compositor_frame.cc b/cc/gl_frame_data.cc
similarity index 64%
copy from cc/compositor_frame.cc
copy to cc/gl_frame_data.cc
index da665395eb4d5def198a733d90bc94f733f4a40a..9895c7927700a837f3a3c8c94de13d0a3e8a4531 100644
--- a/cc/compositor_frame.cc
+++ b/cc/gl_frame_data.cc
@@ -2,12 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "cc/compositor_frame.h"
+#include "cc/gl_frame_data.h"
 
 namespace cc {
 
-CompositorFrame::CompositorFrame() {}
+GLFrameData::GLFrameData()
+    : sync_point(0) {
+}
 
-CompositorFrame::~CompositorFrame() {}
+GLFrameData::~GLFrameData() {}
 
 }  // namespace cc