Introduce FrameSinkManagerHost in content/browser/.

content/browser/compositor/frame_sink_manager_host.h

+// 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 CONTENT_BROWSER_COMPOSITOR_FRAME_SINK_MANAGER_HOST_H_
+#define CONTENT_BROWSER_COMPOSITOR_FRAME_SINK_MANAGER_HOST_H_
+
+#include "base/macros.h"
+#include "cc/ipc/frame_sink_manager.mojom.h"
+#include "cc/surfaces/frame_sink_id.h"
+#include "components/viz/frame_sinks/mojo_frame_sink_manager.h"
+#include "mojo/public/cpp/bindings/binding.h"
+
+namespace cc {
+class SurfaceInfo;
+class SurfaceManager;
+}
+
+namespace content {
+
+// Browser side implementation of mojom::FrameSinkManager. Manages frame sinks
+// and is inteded to replace SurfaceManager.
+class FrameSinkManagerHost : cc::mojom::FrameSinkManagerClient {
+ public:
+  FrameSinkManagerHost();
+  ~FrameSinkManagerHost() override;
+
+  cc::SurfaceManager* surface_manager();
+
+  // See frame_sink_manager.mojom for descriptions.
+  void CreateCompositorFrameSink(
+      const cc::FrameSinkId& frame_sink_id,
+      cc::mojom::MojoCompositorFrameSinkRequest request,
+      cc::mojom::MojoCompositorFrameSinkPrivateRequest private_request,
+      cc::mojom::MojoCompositorFrameSinkClientPtr client);
+  void RegisterFrameSinkHierarchy(const cc::FrameSinkId& parent_frame_sink_id,
+                                  const cc::FrameSinkId& child_frame_sink_id);
+  void UnregisterFrameSinkHierarchy(const cc::FrameSinkId& parent_frame_sink_id,
+                                    const cc::FrameSinkId& child_frame_sink_id);
+
+ private:
+  // cc::mojom::FrameSinkManagerClient:
+  void OnSurfaceCreated(const cc::SurfaceInfo& surface_info) override;
+
+  // Mojo connection to |frame_sink_manager_|.
+  cc::mojom::FrameSinkManagerPtr frame_sink_manager_ptr_;
+
+  // Mojo connection back from |frame_sink_manager_|.
+  mojo::Binding<cc::mojom::FrameSinkManagerClient> binding_;
+
+  // This is owned here so that SurfaceManager will be accessible in process.
+  // Other than using SurfaceManager, access to |frame_sink_manager_| should
+  // happen using Mojo. See http://crbug.com/657959.
+  viz::MojoFrameSinkManager frame_sink_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(FrameSinkManagerHost);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_COMPOSITOR_FRAME_SINK_MANAGER_HOST_H_