Use the connectivity diagnostics launcher so that it can open as an App

chrome/common/extensions/extension_constants.h

Index: chrome/common/extensions/extension_constants.h
diff --git a/chrome/common/extensions/extension_constants.h b/chrome/common/extensions/extension_constants.h
index 8f688cdd472093a20e43e76ed95d48b01aa4a1c8..52a8861ca1ca441dfe5a0d9b843d2cb858dda151 100644
--- a/chrome/common/extensions/extension_constants.h
+++ b/chrome/common/extensions/extension_constants.h
@@ -254,6 +254,7 @@ namespace extension_misc {
   extern const char kChromeVoxExtensionPath[];
   // Path to preinstalled Connectivity Diagnostics extension.
   extern const char kConnectivityDiagnosticsPath[];
+  extern const char kConnectivityDiagnosticsLauncherPath[];
   // Path to preinstalled speech synthesis extension.
   extern const char kSpeechSynthesisExtensionPath[];
   // The extension id of the speech synthesis extension.