Add a blink InterfaceRegistry.

content/renderer/mojo/blink_interface_registry_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_RENDERER_MOJO_BLINK_INTERFACE_REGISTRY_IMPL_H_
+#define CONTENT_RENDERER_MOJO_BLINK_INTERFACE_REGISTRY_IMPL_H_
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "third_party/WebKit/public/platform/InterfaceRegistry.h"
+
+namespace shell {
+class InterfaceRegistry;
+}
+
+namespace content {
+
+class BlinkInterfaceRegistryImpl : public blink::InterfaceRegistry {
+ public:
+  explicit BlinkInterfaceRegistryImpl(
+      base::WeakPtr<shell::InterfaceRegistry> interface_registry);
+  ~BlinkInterfaceRegistryImpl();
+
+  // blink::InterfaceRegistry override.
+  void addInterface(const char* name,
+                    std::unique_ptr<blink::InterfaceFactory> factory) override;
+
+ private:
+  const base::WeakPtr<shell::InterfaceRegistry> interface_registry_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlinkInterfaceRegistryImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MOJO_BLINK_INTERFACE_REGISTRY_IMPL_H_