Very basic Android browser-side compositing support.

content/browser/android/graphics_context.h

+// 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_BROWSER_ANDROID_GRAPHICS_CONTEXT_H_
+#define CONTENT_BROWSER_ANDROID_GRAPHICS_CONTEXT_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/native_widget_types.h"
+
+class WebGraphicsContext3DCommandBufferImpl;
+struct ANativeWindow;
+
+namespace WebKit {
+class WebGraphicsContext3D;
+}
+
+namespace content {
+
+class GraphicsContext {
+ public:
+  ~GraphicsContext();
+
+  // Create and returns a graphics context on the caller's thread and
+  // also creates an image transport surface associated with the given
+  // parent window.
+  static GraphicsContext* CreateForUI(ANativeWindow* ui_window);
+
+  uint32 InsertSyncPoint();
+  int GetSurfaceID();
+
+ private:
+  GraphicsContext(WebGraphicsContext3DCommandBufferImpl* context,
+                  int surface_id,
+                  ANativeWindow* window,
+                  int texture_id1,
+                  int texture_id2);
+
+  scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context_;
+  int surface_id_;
+  ANativeWindow* window_;
+  int texture_id_[2];
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_ANDROID_GRAPHICS_CONTEXT_H_