Unified BeginFrame scheduling

ui/base/compositor/compositor_begin_frame_observer.h

Index: ui/base/compositor/compositor_begin_frame_observer.h
diff --git a/ui/base/compositor/compositor_begin_frame_observer.h b/ui/base/compositor/compositor_begin_frame_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..d9444785dbfd3a787816be2a2ecdcd3e37ef99a2
--- /dev/null
+++ b/ui/base/compositor/compositor_begin_frame_observer.h
@@ -0,0 +1,23 @@
+// Copyright 2014 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.
+
+#ifndef UI_BASE_COMPOSITOR_COMPOSITOR_BEGIN_FRAME_OBSERVER_H_
+#define UI_BASE_COMPOSITOR_COMPOSITOR_BEGIN_FRAME_OBSERVER_H_
+
+namespace cc {
+struct BeginFrameArgs;
+}
+
+namespace ui {
+
+class CompositorBeginFrameObserver {
+ public:
+  virtual ~CompositorBeginFrameObserver() {}
+
+  virtual void OnSendBeginFrame(const cc::BeginFrameArgs& args) = 0;
+};
+
+}  // namespace ui
+
+#endif  // UI_BASE_COMPOSITOR_COMPOSITOR_BEGIN_FRAME_OBSERVER_H_