Revert of Remove MediaStreamTrack.getSources().

third_party/WebKit/Source/modules/mediastream/MediaStreamTrackSourcesRequestImpl.h

+/*
+ * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GOOGLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef MediaStreamTrackSourcesRequestImpl_h
+#define MediaStreamTrackSourcesRequestImpl_h
+
+#include "modules/mediastream/SourceInfo.h"
+#include "platform/mediastream/MediaStreamTrackSourcesRequest.h"
+
+namespace blink {
+
+class ExecutionContext;
+class MediaStreamTrackSourcesCallback;
+class SecurityOrigin;
+class WebSourceInfo;
+template <typename T>
+class WebVector;
+
+class MediaStreamTrackSourcesRequestImpl final
+    : public MediaStreamTrackSourcesRequest {
+ public:
+  static MediaStreamTrackSourcesRequestImpl* create(
+      ExecutionContext&,
+      MediaStreamTrackSourcesCallback*);
+  ~MediaStreamTrackSourcesRequestImpl();
+
+  PassRefPtr<SecurityOrigin> origin() override;
+  void requestSucceeded(const WebVector<WebSourceInfo>&) override;
+
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  MediaStreamTrackSourcesRequestImpl(ExecutionContext&,
+                                     MediaStreamTrackSourcesCallback*);
+
+  void performCallback();
+
+  Member<MediaStreamTrackSourcesCallback> m_callback;
+  Member<ExecutionContext> m_executionContext;
+  SourceInfoVector m_sourceInfos;
+};
+
+}  // namespace blink
+
+#endif  // MediaStreamTrackSourcesRequestImpl_h