cocoa: add some tab-manipulation menu items

chrome/browser/ui/tabs/tab_strip_model.cc

 // Copyright (c) 2012 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/ui/tabs/tab_strip_model.h"
 
 #include <algorithm>
 #include <map>
 #include <set>
 #include <string>
@@ skipping 967 matching lines @@
         // Unpin from the back so that the order is maintained (unpinning can
         // trigger moving a tab).
         for (size_t i = indices.size(); i > 0; --i)
           SetTabPinned(indices[i - 1], false);
       }
       break;
     }
 
     case CommandToggleTabAudioMuted: {
       const std::vector<int>& indices = GetIndicesForCommand(context_index);
-      const bool mute = !chrome::AreAllTabsMuted(*this, indices);
+      const bool mute = WillContextMenuMute(context_index);
       if (mute)
         base::RecordAction(UserMetricsAction("TabContextMenu_MuteTabs"));
       else
         base::RecordAction(UserMetricsAction("TabContextMenu_UnmuteTabs"));
       for (std::vector<int>::const_iterator i = indices.begin();
            i != indices.end(); ++i) {
         chrome::SetTabAudioMuted(GetWebContentsAt(*i), mute,
                                  TabMutedReason::CONTEXT_MENU, std::string());
       }
       break;
@@ skipping 40 matching lines @@
 
   // NOTE: callers expect the vector to be sorted in descending order.
   std::vector<int> indices;
   for (int i = count() - 1; i > last_unclosed_tab; --i) {
     if (i != index && !IsTabPinned(i) && (!is_selected || !IsTabSelected(i)))
       indices.push_back(i);
   }
   return indices;
 }
 
+bool TabStripModel::WillContextMenuMute(int index) {
+  std::vector<int> indices = GetIndicesForCommand(index);
+  return !chrome::AreAllTabsMuted(*this, indices);
+}
+
 bool TabStripModel::WillContextMenuPin(int index) {
   std::vector<int> indices = GetIndicesForCommand(index);
   // If all tabs are pinned, then we unpin, otherwise we pin.
   bool all_pinned = true;
   for (size_t i = 0; i < indices.size() && all_pinned; ++i)
     all_pinned = IsTabPinned(indices[i]);
   return !all_pinned;
 }
 
 // static
@@ skipping 308 matching lines @@
 
 void TabStripModel::FixOpenersAndGroupsReferencing(int index) {
   WebContents* old_contents = GetWebContentsAtImpl(index);
   for (auto& data : contents_data_) {
     if (data->group() == old_contents)
       data->set_group(contents_data_[index]->group());
     if (data->opener() == old_contents)
       data->set_opener(contents_data_[index]->opener());
   }
 }