Allow settings dialog to be opened via the app launcher, as a packaged app.

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 2b0e85816b224bfdcc3bbcf22c4ed2f402ca48a5..8174b1feeec9c1266e7d2ad17e603894a8e40a85 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -632,6 +632,9 @@ const char kScriptBadges[]                  = "script-badges";
 // supported server-side for searches on google.com.
 const char kEnableSdch[]                    = "enable-sdch";
 
+// Enable the settings WebUI dialog that installs as a packaged app.
+const char kEnableSettingsApp[]             = "enable-settings-app";
+
 // Enable SPDY/3. This is a temporary testing flag.
 const char kEnableSpdy3[]                   = "enable-spdy3";