Add browser test cases for tab and audio share, which are new functionality of desktop share.

content/public/browser/desktop_media_id.h

 // Copyright 2013 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 CONTENT_PUBLIC_BROWSER_DESKTOP_MEDIA_ID_H_
 #define CONTENT_PUBLIC_BROWSER_DESKTOP_MEDIA_ID_H_
 
 #include <string>
 #include <tuple>
 
@@ skipping 28 matching lines @@
   static aura::Window* GetAuraWindowById(const DesktopMediaID& id);
 #endif  // defined(USE_AURA)
 
   DesktopMediaID() = default;
 
   DesktopMediaID(Type type, Id id) : type(type), id(id) {}
 
   DesktopMediaID(Type type, Id id, WebContentsMediaCaptureId web_contents_id)
       : type(type), id(id), web_contents_id(web_contents_id) {}
 
+  DesktopMediaID(Type type, Id id, bool audio_share)
+      : type(type), id(id), audio_share(audio_share) {}
+
   // Operators so that DesktopMediaID can be used with STL containers.
   bool operator<(const DesktopMediaID& other) const;
   bool operator==(const DesktopMediaID& other) const;
 
   bool is_null() const { return type == TYPE_NONE; }
   std::string ToString() const;
   static DesktopMediaID Parse(const std::string& str);
 
   Type type = TYPE_NONE;
 
@@ skipping 11 matching lines @@
   // This records whether the desktop share has sound or not.
   bool audio_share = false;
 
   // This id contains information for WebContents capture.
   WebContentsMediaCaptureId web_contents_id;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DESKTOP_MEDIA_ID_H_