Tab audio mute control (views UI), behind a switch (off by default).

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 <string>
 
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_delegate.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_order_controller.h"
+#include "chrome/browser/ui/tabs/tab_utils.h"
 #include "chrome/browser/ui/web_contents_sizer.h"
 #include "chrome/common/url_constants.h"
 #include "components/web_modal/popup_manager.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_observer.h"
 using base::UserMetricsAction;
 using content::WebContents;
 
@@ skipping 880 matching lines @@
 
     case CommandTogglePinned: {
       std::vector<int> indices = GetIndicesForCommand(context_index);
       for (size_t i = 0; i < indices.size(); ++i) {
         if (!IsAppTab(indices[i]))
           return true;
       }
       return false;
     }
 
+    case CommandToggleTabAudioMuted: {
+      std::vector<int> indices = GetIndicesForCommand(context_index);
+      for (size_t i = 0; i < indices.size(); ++i) {
+        if (!chrome::CanToggleAudioMute(GetWebContentsAt(indices[i])))
+          return false;
+      }
+      return true;
+    }
+
     case CommandBookmarkAllTabs:
       return browser_defaults::bookmarks_enabled &&
           delegate_->CanBookmarkAllTabs();
 
     case CommandSelectByDomain:
     case CommandSelectByOpener:
       return true;
 
     default:
       NOTREACHED();
@@ skipping 87 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) {
           if (!IsAppTab(indices[i - 1]))
             SetTabPinned(indices[i - 1], false);
         }
       }
       break;
     }
 
+    case CommandToggleTabAudioMuted: {
+      const std::vector<int>& indices = GetIndicesForCommand(context_index);
+      const bool mute = !chrome::AreAllTabsMuted(*this, indices);
+      if (mute)
+        content::RecordAction(UserMetricsAction("TabContextMenu_MuteTabs"));
+      else
+        content::RecordAction(UserMetricsAction("TabContextMenu_UnmuteTabs"));
+      for (std::vector<int>::const_iterator i = indices.begin();
+           i != indices.end(); ++i) {
+        chrome::SetTabAudioMuted(GetWebContentsAt(*i), mute);
+      }
+      break;
+    }
+
     case CommandBookmarkAllTabs: {
       content::RecordAction(
           UserMetricsAction("TabContextMenu_BookmarkAllTabs"));
 
       delegate_->BookmarkAllTabs();
       break;
     }
 
     case CommandSelectByDomain:
     case CommandSelectByOpener: {
@@ skipping 366 matching lines @@
 void TabStripModel::ForgetOpenersAndGroupsReferencing(
     const WebContents* tab) {
   for (WebContentsDataVector::const_iterator i = contents_data_.begin();
        i != contents_data_.end(); ++i) {
     if ((*i)->group() == tab)
       (*i)->set_group(NULL);
     if ((*i)->opener() == tab)
       (*i)->set_opener(NULL);
   }
 }