Implement setSinkId() for media elements without src.

third_party/WebKit/Source/web/AudioOutputDeviceClientImpl.cpp

Index: third_party/WebKit/Source/web/AudioOutputDeviceClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/AudioOutputDeviceClientImpl.cpp b/third_party/WebKit/Source/web/AudioOutputDeviceClientImpl.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..db13a7f41e3f9d01ceeff9ebdb8f662ec1b7c40d
--- /dev/null
+++ b/third_party/WebKit/Source/web/AudioOutputDeviceClientImpl.cpp
@@ -0,0 +1,36 @@
+// Copyright 2015 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.
+
+#include "config.h"
+#include "web/AudioOutputDeviceClientImpl.h"
+
+#include "core/dom/Document.h"
+#include "core/dom/ExecutionContext.h"
+#include "public/web/WebFrameClient.h"
+#include "web/WebLocalFrameImpl.h"
+
+namespace blink {
+
+PassOwnPtrWillBeRawPtr<AudioOutputDeviceClientImpl> AudioOutputDeviceClientImpl::create()
+{
+    return adoptPtrWillBeNoop(new AudioOutputDeviceClientImpl());
+}
+
+AudioOutputDeviceClientImpl::AudioOutputDeviceClientImpl()
+{
+}
+
+AudioOutputDeviceClientImpl::~AudioOutputDeviceClientImpl()
+{
+}
+
+void AudioOutputDeviceClientImpl::checkIfAudioSinkExistsAndIsAuthorized(ExecutionContext* context, const WebString& sinkId, PassOwnPtr<WebSetSinkIdCallbacks> callbacks)
+{
+    ASSERT(context && context->isDocument());
+    Document* document = toDocument(context);
+    WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(document->frame());
+    webFrame->client()->checkIfAudioSinkExistsAndIsAuthorized(sinkId, WebSecurityOrigin(context->securityOrigin()), callbacks.leakPtr());
+}
+
+} // namespace blink