[MR] Cancel auto-switching from tab mirroring to Cast SDK at page navigation based on user pref

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 26 matching lines @@
 // 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);
 
+// Returns true if |presentation_id| is an ID used by auto-join requests.
+bool IsAutoJoinPresentationId(const std::string& presentation_id);
+
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_MEDIA_SOURCE_HELPER_H_