Fork cc::OutputSurface into cc::CompositorFrameSink.

blimp/client/core/compositor/blimp_compositor_frame_sink_proxy.h

Index: blimp/client/core/compositor/blimp_compositor_frame_sink_proxy.h
diff --git a/blimp/client/core/compositor/blimp_compositor_frame_sink_proxy.h b/blimp/client/core/compositor/blimp_compositor_frame_sink_proxy.h
new file mode 100644
index 0000000000000000000000000000000000000000..ab995c2913d72d55a7a481de9030acdbc41db75c
--- /dev/null
+++ b/blimp/client/core/compositor/blimp_compositor_frame_sink_proxy.h
@@ -0,0 +1,56 @@
+// 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 BLIMP_CLIENT_CORE_COMPOSITOR_BLIMP_COMPOSITOR_FRAME_SINK_PROXY_H_
+#define BLIMP_CLIENT_CORE_COMPOSITOR_BLIMP_COMPOSITOR_FRAME_SINK_PROXY_H_
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "cc/resources/returned_resource.h"
+
+namespace cc {
+class CompositorFrame;
+}
+
+namespace blimp {
+namespace client {
+
+class BlimpCompositorFrameSinkProxyClient {
+ public:
+  virtual ~BlimpCompositorFrameSinkProxyClient() {}
+
+  // Sent when the compositor can reclaim the |resources| references in a
+  // compositor frame.
+  virtual void ReclaimCompositorResources(
+      const cc::ReturnedResourceArray& resources) = 0;
+};
+
+// This class is meant to bounce CompositorFrames from the compositor thread's
+// CompositorFrameSink to the main thread. As such, it should be used on the
+// main thread only.
+class BlimpCompositorFrameSinkProxy {
+ public:
+  virtual ~BlimpCompositorFrameSinkProxy() {}
+
+  // Will be called before any frames are sent to the client. The weak ptr
+  // provided here can be used to post messages to the CompositorFrameSink on
+  // the compositor thread.
+  virtual void BindToProxyClient(
+      base::WeakPtr<BlimpCompositorFrameSinkProxyClient> client) = 0;
+
+  // The implementation should take the contents of the compositor frame and
+  // return the referenced resources when the frame is no longer being drawn
+  // using BlimpCompositorFrameSinkProxyClient::ReclaimCompositorResources.
+  virtual void SwapCompositorFrame(cc::CompositorFrame frame) = 0;
+
+  // Will be called when the use of the CompositorFrameSink is being terminated.
+  // No calls from this output surface will be made to the client after this
+  // point.
+  virtual void UnbindProxyClient() = 0;
+};
+
+}  // namespace client
+}  // namespace blimp
+
+#endif  // BLIMP_CLIENT_CORE_COMPOSITOR_BLIMP_COMPOSITOR_FRAME_SINK_PROXY_H_