Add initial support for native Linux desktop notifications

chrome/common/chrome_switches.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/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "build/build_config.h"
 #include "ppapi/features/features.h"
@@ skipping 1163 matching lines @@
 #endif
 }
 
 #if defined(OS_CHROMEOS)
 bool PowerOverlayEnabled() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       ::switches::kEnablePowerOverlay);
 }
 #endif
 
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+// Send notifications to the notification center supplied by the Linux
+// desktop environment instead of using Chrome-rendered notifications.
+const char kUseSystemNotifications[] = "use-system-notifications";
+#endif
+
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR VERY NICE FLAGS TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead, please
 // put them in alphabetical order above, or in order inside the appropriate
 // ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches