Implement setSinkId() for media elements without src.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index e5146f415d8201e860b63d368a8b865fbc381c49..16cbe135822dc7c43b26ce7a61c59d845ef68991 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -5,6 +5,7 @@
 #ifndef CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
+#include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ -25,6 +26,7 @@
 #include "content/renderer/render_frame_proxy.h"
 #include "content/renderer/renderer_webcookiejar_impl.h"
 #include "ipc/ipc_message.h"
+#include "media/base/output_device.h"
 #include "media/blink/webmediaplayer_delegate.h"
 #include "media/blink/webmediaplayer_params.h"
 #include "mojo/application/public/interfaces/service_provider.mojom.h"
@@ -883,6 +885,20 @@ class CONTENT_EXPORT RenderFrameImpl
   // ServiceProvider.
   mojo::ServiceProviderPtr ConnectToApplication(const GURL& url);
 
+  // Asynchronously checks that |sink_id| exists and is authorized to be used
+  // on |security_origin|.
+  void checkIfAudioSinkExistsAndIsAuthorized(
+      const blink::WebString& sink_id,
+      const blink::WebSecurityOrigin& security_origin,
+      blink::WebSetSinkIdCallbacks* callback) override;
+
+  // Checks that |device_id| exists and is authorized to be used on
+  // |security_origin|.
+  void DoCheckIfAudioSinkExistsAndIsAuthorized(
+      const std::string& device_id,
+      const url::Origin& security_origin,
+      const media::SwitchOutputDeviceCB& callback);
+
   // Stores the WebLocalFrame we are associated with.  This is null from the
   // constructor until SetWebFrame is called, and it is null after
   // frameDetached is called until destruction (which is asynchronous in the