Media Capabilities: add plumbing between Blink and media/blink/.

media/blink/webmediacapabilitiesclient_impl.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 MEDIA_BLINK_WEBMEDIACAPABILITIESCLIENT_IMPL_H_
+#define MEDIA_BLINK_WEBMEDIACAPABILITIESCLIENT_IMPL_H_
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "media/blink/media_blink_export.h"
+#include "third_party/WebKit/public/platform/modules/media_capabilities/WebMediaCapabilitiesClient.h"
+
+namespace media {
+
+class MEDIA_BLINK_EXPORT WebMediaCapabilitiesClientImpl
+    : NON_EXPORTED_BASE(public blink::WebMediaCapabilitiesClient) {
+ public:
+  WebMediaCapabilitiesClientImpl();
+  ~WebMediaCapabilitiesClientImpl() override;
+
+  // Implementation of blink::WebMediaCapabilitiesClient.
+  void query(
+      const blink::WebMediaConfiguration&,
+      std::unique_ptr<blink::WebMediaCapabilitiesQueryCallbacks>) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WebMediaCapabilitiesClientImpl);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_BLINK_WEBMEDIACAPABILITIESCLIENT_IMPL_H_