Add CompositorFrameSinkClientBinding To Be Used By FrameGenerator

services/ui/ws/compositor_frame_sink_client_binding.h

Index: services/ui/ws/compositor_frame_sink_client_binding.h
diff --git a/services/ui/ws/compositor_frame_sink_client_binding.h b/services/ui/ws/compositor_frame_sink_client_binding.h
new file mode 100644
index 0000000000000000000000000000000000000000..5d455841c59792c7dae137b7fcea57e4f3618288
--- /dev/null
+++ b/services/ui/ws/compositor_frame_sink_client_binding.h
@@ -0,0 +1,51 @@
+// Copyright 2017 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 SERVICES_UI_WS_COMPOSITOR_FRAME_SINK_CLIENT_BINDING_H_

[Fady Samuel, 2017/05/19 14:21:51]

Rename file to compositor_frame_sink_binding.h

[Alex Z., 2017/05/19 14:25:23]

I followed the naming convention from WindowTreeBinding:
WindowTreeBinding holds a mojo binding for WindowTree and interface
pointer to WindowTreeClient and is called WindowTreeBinding.

This class holds a binding to MojoCompositorFrameSinkClient and an 
InterfacePtr to MojoCFS so I call it MojoCFSClientBinding.

WDYT?

+#define SERVICES_UI_WS_COMPOSITOR_FRAME_SINK_CLIENT_BINDING_H_
+
+#include "base/macros.h"
+#include "cc/ipc/frame_sink_manager.mojom.h"
+#include "cc/ipc/mojo_compositor_frame_sink.mojom.h"
+#include "cc/surfaces/local_surface_id_allocator.h"
+#include "mojo/public/cpp/bindings/binding.h"
+
+namespace ui {
+namespace ws {
+
+// CompositorFrameSinkClientBinding manages the binding between a FrameGenerator
+// and its MojoCompositorFrameSink. CompositorFrameSinkClientBinding exists so
+// that a mock implementation of MojoCompositorFrameSink can be injected for
+// tests. FrameGenerator owns its associated CompositorFrameSinkClientBinding.
+class CompositorFrameSinkClientBinding

[Fady Samuel, 2017/05/19 14:21:51]

nit: CompositorFrameSinkClientBinding => CompsitorFrameSinkBinding

+    : public cc::mojom::MojoCompositorFrameSink {
+ public:
+  CompositorFrameSinkClientBinding(
+      cc::mojom::MojoCompositorFrameSinkClient* sink_client,
+      cc::mojom::MojoCompositorFrameSinkClientRequest sink_client_request,
+      cc::mojom::MojoCompositorFrameSinkAssociatedPtr compositor_frame_sink,
+      cc::mojom::DisplayPrivateAssociatedPtr display_private);
+  ~CompositorFrameSinkClientBinding() override;
+
+ private:
+  // cc::mojom::MojoCompositorFrameSink implementation:
+  void SubmitCompositorFrame(const cc::LocalSurfaceId& local_surface_id,
+                             cc::CompositorFrame frame) override;
+  void SetNeedsBeginFrame(bool needs_begin_frame) override;
+  void BeginFrameDidNotSwap(const cc::BeginFrameAck& ack) override;
+  void EvictCurrentSurface() override;
+
+  mojo::Binding<cc::mojom::MojoCompositorFrameSinkClient> binding_;
+  cc::mojom::DisplayPrivateAssociatedPtr display_private_;
+  cc::mojom::MojoCompositorFrameSinkAssociatedPtr compositor_frame_sink_;
+  cc::LocalSurfaceId local_surface_id_;
+  cc::LocalSurfaceIdAllocator id_allocator_;
+  gfx::Size last_submitted_frame_size_;
+
+  DISALLOW_COPY_AND_ASSIGN(CompositorFrameSinkClientBinding);
+};
+}
+}
+
+#endif  // SERVICES_UI_WS_COMPOSITOR_FRAME_SINK_CLIENT_BINDING_H_