Not for review.

cc/output/software_overlay_presenter_hal.h

+// Copyright 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 CC_OUTPUT_SOFTWARE_OVERLAY_PRESENTER_HAL_H_
+#define CC_OUTPUT_SOFTWARE_OVERLAY_PRESENTER_HAL_H_
+
+#include "base/basictypes.h"
+#include "cc/base/cc_export.h"
+#include "cc/quads/render_pass.h"
+
+namespace cc {
+
+class CC_EXPORT SoftwareOverlayPresenterHAL {

[rjkroege, 2014/01/10 19:14:04]

needs some docs too.

This is the abstraction to the HAL layer?

+ public:
+  struct OverlaySurface {
+    OverlaySurface();
+    ~OverlaySurface();
+    gfx::Rect rect;
+  };
+
+  SoftwareOverlayPresenterHAL();
+  virtual ~SoftwareOverlayPresenterHAL();
+
+  // Returns the instance
+  static SoftwareOverlayPresenterHAL* GetInstance();
+
+  // Sets the implementation delegate. Ownership is retained by the caller.
+  static void SetInstance(SoftwareOverlayPresenterHAL* impl);
+
+  static SoftwareOverlayPresenterHAL* CreateTestHelper();
+
+  virtual void CheckOverlaySupport(std::vector<OverlaySurface>* surfaces) = 0;
+
+ private:
+  static SoftwareOverlayPresenterHAL* impl_;  // not owned
+};
+
+}  // namespace cc
+
+#endif  // CC_OUTPUT_SOFTWARE_OVERLAY_PRESENTER_HAL_H_