Add initial support for native Linux desktop notifications

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 664dbb8c8b7b9781dadb8e473229ed5426955423..959b6897076bd57392536011f54011f23c85953e 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1181,6 +1181,12 @@ bool PowerOverlayEnabled() {
 }
 #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.
 //