[Android WebView] Implement Ubercomp for Render Thread support

android_webview/browser/parent_output_surface.h

Index: android_webview/browser/parent_output_surface.h
diff --git a/android_webview/browser/parent_output_surface.h b/android_webview/browser/parent_output_surface.h
new file mode 100644
index 0000000000000000000000000000000000000000..32e296f8ddb1d5857d6c0325a8364f303d3bb16e
--- /dev/null
+++ b/android_webview/browser/parent_output_surface.h
@@ -0,0 +1,38 @@
+// 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 ANDROID_WEBVIEW_BROWSER_PARENT_OUTPUT_SURFACE_H_
+#define ANDROID_WEBVIEW_BROWSER_PARENT_OUTPUT_SURFACE_H_
+
+#include "base/memory/weak_ptr.h"
+#include "cc/output/output_surface.h"
+
+namespace android_webview {
+
+class ParentOutputSurface : NON_EXPORTED_BASE(public cc::OutputSurface) {
+ public:
+  explicit ParentOutputSurface(
+      scoped_refptr<cc::ContextProvider> context_provider);
+  virtual ~ParentOutputSurface();
+
+  // OutputSurface.
+  virtual bool BindToClient(cc::OutputSurfaceClient* client) OVERRIDE;
+  virtual void Reshape(const gfx::Size& size, float scale_factor) OVERRIDE {}
+  virtual void SwapBuffers(cc::CompositorFrame* frame) OVERRIDE;
+
+  base::WeakPtr<ParentOutputSurface> GetWeakPtr();
+  void SetDrawConstraints(const gfx::Size& surface_size, const gfx::Rect& clip);
+
+ private:
+  void UpdateClientBeforeDraw();
+
+  base::WeakPtrFactory<ParentOutputSurface> weak_factory_;
+  gfx::Rect clip_;
+
+  DISALLOW_COPY_AND_ASSIGN(ParentOutputSurface);
+};
+
+}  // namespace android_webview
+
+#endif  // ANDROID_WEBVIEW_BROWSER_PARENT_OUTPUT_SURFACE_H_