Add isInIncognitoMode to the webstore private API.

BUG=245835

Review URL: https://chromiumcodereview.appspot.com/17032003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@209402 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_function_histogram_value.h b/chrome/browser/extensions/extension_function_histogram_value.h
index 4a2fc692..9a8ef6d 100644
--- a/chrome/browser/extensions/extension_function_histogram_value.h
+++ b/chrome/browser/extensions/extension_function_histogram_value.h
@@ -557,6 +557,7 @@
   METRICSPRIVATE_GETFIELDTRIAL,
   FILEBROWSERPRIVATE_ZOOM,
   WEBVIEW_GO,
+  WEBSTOREPRIVATE_ISININCOGNITOMODEFUNCTION,
   ENUM_BOUNDARY // Last entry: Add new entries above.
 };