Initial client side implementation of the XPC service

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 f849455646ec189f23fbc270e221cf9078254887..83cf570a44954ac92385dd0344ec851c72dff9f7 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -397,6 +397,12 @@ const char kEnableMaterialDesignPolicyPage[]  = "enable-md-policy-page";
 // (internally adds lEnableGpuPlugin to the command line).
 const char kEnableNaCl[]                    = "enable-nacl";
 
+#if defined(OS_MACOSX)
+// Enable the use of native notifications alerts in addition to banners.
+// Requires kEnableNativeNotifications enabled too.
+const char kEnableNativeAlerts[] = "enable-native-alerts";
+#endif  // defined(OS_MACOSX)
+
 // Enables the use of native notifications instead of using the Chrome based
 // ones.
 const char kEnableNativeNotifications[] = "enable-native-notifications";