Very basic Android browser-side compositing support.

content/public/browser/android/compositor.h

Index: content/public/browser/android/compositor.h
diff --git a/content/public/browser/android/compositor.h b/content/public/browser/android/compositor.h
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+// 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.
+
+#ifndef CONTENT_PUBLIC_BROWSER_ANDROID_COMPOSITOR_H_
+#define CONTENT_PUBLIC_BROWSER_ANDROID_COMPOSITOR_H_
+
+#include "base/callback.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/size.h"
+
+namespace WebKit {
+class WebLayer;
+}
+
+namespace content {
+
+// An interface to the browser-side compositor.
+class Compositor {
+ public:
+  virtual ~Compositor() {}
+
+  // Performs the global initialization needed before any compositor
+  // instance can be used.
+  static void Initialize();
+
+  // Creates and returns a compositor instance.
+  static Compositor* Create();
+
+  // Attaches the layer tree.
+  virtual void SetRootLayer(WebKit::WebLayer* root) = 0;
+
+  // Set the output surface bounds.
+  virtual void SetWindowBounds(const gfx::Size& size) = 0;
+
+  // Set the output surface handle which the compositor renders into.
+  virtual void SetWindowSurface(ANativeWindow* window) = 0;
+
+  // Callback to be run after the frame has been drawn. It passes back
+  // a synchronization point identifier.
+  typedef base::Callback<void(uint32)> SurfacePresentedCallback;
+
+  virtual void OnSurfaceUpdated(const SurfacePresentedCallback& callback) = 0;
+
+ protected:
+  Compositor() {}
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_ANDROID_COMPOSITOR_H_