Pass origin to StartObservingMediaSinks.

chrome/browser/ui/webui/media_router/query_result_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_QUERY_RESULT_MANAGER_H_
 #define CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_QUERY_RESULT_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <vector>
@@ skipping 21 matching lines @@
 // associated with a media source.  This class allows the dialog to receive
 // lists of MediaSinks compatible with the cast modes available through the
 // dialog.
 //
 // Typical use:
 //
 //   QueryResultManager::Observer* observer = ...;
 //   QueryResultManager result_manager(router);
 //   result_manager.AddObserver(observer);
 //   result_manager.StartSinksQuery(MediaCastMode::DEFAULT,
-//       MediaSourceForPresentationUrl("http://google.com"));
+//       MediaSourceForPresentationUrl("http://google.com"),

[mark a. foltz, 2016/03/03 22:58:37]

Make the presentation URL different from the origin, for clarity.

[matt.boetger, 2016/03/04 00:22:11]

Done.

+//       GURL("http://google.com"));
 //   result_manager.StartSinksQuery(MediaCastMode::TAB_MIRROR,
-//       MediaSourceForTab(123));
+//       MediaSourceForTab(123), GURL(""));

[mark a. foltz, 2016/03/03 22:58:37]

When would a sinks query not pass an origin?

[matt.boetger, 2016/03/04 00:22:11]

For tabs.

 //   ...
 //   [Updates will be received by observer via OnResultsUpdated()]
 //   ...
 //   [When info on MediaSource is needed, i.e. when requesting route for a mode]
 //   CastModeSet cast_modes;
 //   result_manager.GetSupportedCastModes(&cast_modes);
 //   [Logic to select a MediaCastMode from the set]
 //   MediaSource source = result_manager.GetSourceForCastMode(
 //       MediaCastMode::TAB_MIRROR);
 //   if (!source.Empty()) {
@@ skipping 21 matching lines @@
   void RemoveObserver(Observer* observer);
 
   // Requests a list of MediaSinks compatible with |source| for |cast_mode|.
   // Results are sent to all observers registered with AddObserver().
   //
   // May start a new query in the Media Router for the registered source if
   // there is no existing query for it.  If there is an existing query for
   // |cast_mode|, it is stopped.
   //
   // If |source| is empty, no new queries are begun.
-  void StartSinksQuery(MediaCastMode cast_mode, const MediaSource& source);
+  void StartSinksQuery(MediaCastMode cast_mode,
+                       const MediaSource& source);
 
   // Stops notifying observers for |cast_mode|.
   void StopSinksQuery(MediaCastMode cast_mode);
 
   // Gets the set of cast modes that are being actively queried. |cast_mode_set|
   // should be empty.
   void GetSupportedCastModes(CastModeSet* cast_modes) const;
 
   // Returns the MediaSource registered for |cast_mode|.  Returns an empty
   // MediaSource if there is none.
@@ skipping 42 matching lines @@
   MediaRouter* router_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(QueryResultManager);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_QUERY_RESULT_MANAGER_H_