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

chrome/browser/extensions/api/desktop_capture/desktop_capture_base.cc

 // 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.
 
 #include "chrome/browser/extensions/api/desktop_capture/desktop_capture_base.h"
 
 #include <tuple>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 102 matching lines @@
 
   if (!show_screens && !show_windows && !show_tabs) {
     error_ = kEmptySourcesListError;
     return false;
   }
 
   const gfx::NativeWindow parent_window =
       web_contents->GetTopLevelNativeWindow();
   scoped_ptr<DesktopMediaList> media_list;
   if (g_picker_factory) {
-    media_list = g_picker_factory->CreateModel(
-        show_screens, show_windows);
+    media_list = g_picker_factory->CreateModel(show_screens, show_windows,
+                                               show_tabs, request_audio);
     picker_ = g_picker_factory->CreatePicker();
   } else {
     std::vector<scoped_ptr<DesktopMediaList>> media_lists;
     // Create a screens/windows list and push it into media_lists.
     if (show_screens || show_windows) {
 #if defined(USE_ASH)
       if (chrome::IsNativeWindowInAsh(parent_window)) {
         media_lists.push_back(make_scoped_ptr(new DesktopMediaListAsh(
             (show_screens ? DesktopMediaListAsh::SCREENS : 0) |
             (show_windows ? DesktopMediaListAsh::WINDOWS : 0))));
@@ skipping 124 matching lines @@
 
 void DesktopCaptureRequestsRegistry::CancelRequest(int process_id,
                                                    int request_id) {
   RequestsMap::iterator it = requests_.find(RequestId(process_id, request_id));
   if (it != requests_.end())
     it->second->Cancel();
 }
 
 
 }  // namespace extensions