Establish mojo service between Canvas (blink) and SurfaceManager (browser)

content/browser/renderer_host/offscreen_canvas_surface_service_impl.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 CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_SERVICE_IMPL_H_
+#define CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_SERVICE_IMPL_H_
+
+#include "cc/surfaces/surface_factory.h"
+#include "cc/surfaces/surface_factory_client.h"
+#include "cc/surfaces/surface_id.h"
+#include "cc/surfaces/surface_id_allocator.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
+#include "mojo/public/cpp/bindings/string.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "third_party/WebKit/public/platform/modules/offscreencanvas/offscreen_canvas_surface_service.mojom.h"
+
+namespace content {
+
+class OffscreenCanvasSurfaceServiceImpl
+    : public blink::mojom::OffscreenCanvasSurfaceService,
+      public cc::SurfaceFactoryClient {
+  public:
+    static void Create(
+        mojo::InterfaceRequest<blink::mojom::OffscreenCanvasSurfaceService>
+        request);
+    ~OffscreenCanvasSurfaceServiceImpl() override;
+
+    void GetSurfaceId(const GetSurfaceIdCallback& callback) override;
+    void RequestSurfaceCreation(
+            const blink::mojom::SurfaceIdPtr surface_id) override;
+    void Require(blink::mojom::SurfaceIdPtr surface_id,
+            blink::mojom::SurfaceSequencePtr sequence) override;
+    void Satisfy(blink::mojom::SurfaceSequencePtr sequence) override;
+
+    // cc::SurfaceFactoryClient implementation.
+    void ReturnResources(const cc::ReturnedResourceArray& resources) override;
+    void WillDrawSurface(cc::SurfaceId id,
+            const gfx::Rect& damage_rect) override;
+    void SetBeginFrameSource(cc::BeginFrameSource* begin_frame_source) override;
+
+  private:
+    explicit OffscreenCanvasSurfaceServiceImpl(
+        mojo::InterfaceRequest<blink::mojom::OffscreenCanvasSurfaceService>
+        request);
+
+    // Surface-related state
+    std::unique_ptr<cc::SurfaceIdAllocator> id_allocator_;
+    std::unique_ptr<cc::SurfaceFactory> surface_factory_;
+
+    mojo::StrongBinding<blink::mojom::OffscreenCanvasSurfaceService> binding_;
+
+    DISALLOW_COPY_AND_ASSIGN(OffscreenCanvasSurfaceServiceImpl);
+};
+
+} // namespace content
+
+#endif // CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_SERVICE_IMPL_H_