Allow for pausing background tabs on desktop via about:flags.

chrome/browser/flag_descriptions.cc

 // Copyright 2017 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/flag_descriptions.h"
 
 namespace flag_descriptions {
 
 //  Material Design version of chrome://bookmarks
 
@@ skipping 2741 matching lines @@
     "Make size of accessibility large cursor adjustable.";
 
 #if defined(OS_CHROMEOS) || defined(OS_LINUX) || defined(OS_MACOSX) || \
     defined(OS_WIN)
 
 const char kOmniboxEntitySuggestionsName[] = "Omnibox entity suggestions";
 
 const char kOmniboxEntitySuggestionsDescription[] =
     "Enable receiving entity suggestions in Omnibox.";
 
+const char kPauseBackgroundTabsName[] = "Pause background tabs";
+const char kPauseBackgroundTabsDescription[] =
+    "Pause timers in background tabs after 5 minutes on desktop.";
+
 #endif  // defined(OS_CHROMEOS) || defined(OS_LINUX) || defined(OS_MACOSX) ||
         // defined(OS_WIN)
 
 #if defined(OS_CHROMEOS)
 
 const char kEnableChromevoxArcSupportName[] = "ChromeVox ARC support";
 
 const char kEnableChromevoxArcSupportDescription[] =
     "Enable ChromeVox screen reader features in ARC";
 
@@ skipping 195 matching lines @@
 const char kEnableCopylessPasteDescription[] =
     "Provide suggestions for text input, based on your recent context. For "
     "example, if you looked at a restaurant website and switched to the Maps "
     "app, the keyboard would offer the name of that restaurant as a suggestion "
     "to enter into the search bar. The data is indexed locally, and never sent "
     "to the server. It's disabled in incognito mode.";
 
 #endif  // defined(OS_ANDROID)
 
 }  // namespace flag_descriptions