Implement native web notifications for mac

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 c9c9249829c2994a148f1d40f294bcaf7cc9cf2f..f723ab8de396e1cc5e030f08df4b6f8b3aa0fc22 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -434,6 +434,10 @@ const char kEnableMaterialDesignPolicyPage[]  = "enable-md-policy-page";
 // (internally adds lEnableGpuPlugin to the command line).
 const char kEnableNaCl[]                    = "enable-nacl";
 
+// Enables the use of native notifications instead of
+// using the chrome based ones.
+const char kEnableNativeNotifications[] = "enable-native-notifications";
+
 // Enables tracing for each navigation. It will attempt to trace each navigation
 // for 10s, until the buffer is full, or until the next navigation.
 // It only works if a URL was provided by --trace-upload-url.