[Media Router] Handle multiple Presentation URLs when creating routes

chrome/browser/media/router/media_source_helper.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_MEDIA_ROUTER_MEDIA_SOURCE_HELPER_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_MEDIA_SOURCE_HELPER_H_
 
 #include <string>
 
 #include "chrome/browser/media/router/media_source.h"
@@ skipping 11 matching lines @@
 MediaSource MediaSourceForTab(int tab_id);
 MediaSource MediaSourceForTabContentRemoting(content::WebContents* contents);
 MediaSource MediaSourceForDesktop();
 MediaSource MediaSourceForPresentationUrl(const GURL& presentation_url);
 
 // Returns true if |source| outputs its content via mirroring.
 bool IsDesktopMirroringMediaSource(const MediaSource& source);
 bool IsTabMirroringMediaSource(const MediaSource& source);
 bool IsMirroringMediaSource(const MediaSource& source);
 
+// Returns true if |source| is a media route type that can be connected to the

[mark a. foltz, 2016/12/02 20:59:08]

Nit: s/media route type/media source/

[zhaobin, 2016/12/02 22:50:57]

Done.

+// Presentation API by from a request initiated by the browser.
+bool CanConnectToMediaSource(const MediaSource& source);
+
 // Parses the |source| and returns the SessionTabHelper tab ID referencing a
 // source tab. Returns a non-positive value on error.
 int TabIdFromMediaSource(const MediaSource& source);
 
 // Checks that |source| is a parseable URN and is of a known type.
 // Does not deeper protocol-level syntax checks.
 bool IsValidMediaSource(const MediaSource& source);
 
 // Returns true if |url| is a valid presentation URL.
 bool IsValidPresentationUrl(const GURL& url);
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_MEDIA_SOURCE_HELPER_H_