cc: Add OverlayStrategyFullscreen strategy.

cc/output/overlay_strategy_fullscreen.h

+// Copyright 2016 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_OVERLAY_STRATEGY_FULLSCREEN_H_
+#define CC_OUTPUT_OVERLAY_STRATEGY_FULLSCREEN_H_
+
+#include "base/macros.h"
+#include "cc/output/overlay_processor.h"
+
+namespace cc {
+
+class OverlayCandidateValidator;
+// Overlay strategy to promote a single full screen quad to an overlay.
+// The promoted quad should have all the property of the framebuffer and it
+// should be possible to use it as such.
+class CC_EXPORT OverlayStrategyFullscreen : public OverlayProcessor::Strategy {
+ public:
+  OverlayStrategyFullscreen();
+  ~OverlayStrategyFullscreen() override;
+
+  bool Attempt(ResourceProvider* resource_provider,
+               RenderPass* render_pass,
+               OverlayCandidateList* candidate_list) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(OverlayStrategyFullscreen);
+};
+
+}  // namespace cc
+
+#endif  // CC_OUTPUT_OVERLAY_STRATEGY_FULLSCREEN_H_