Media Galleries: Add chrome.mediaGalleries.addUserSelectedFolder().

BUG=318411

Review URL: https://codereview.chromium.org/93643002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244128 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 9b9a304..3b4dc6d 100644
--- a/chrome/browser/extensions/extension_function_histogram_value.h
+++ b/chrome/browser/extensions/extension_function_histogram_value.h
@@ -717,6 +717,7 @@
   BOOKMARKMANAGERPRIVATE_REDO,
   BOOKMARKMANAGERPRIVATE_UNDOINFO,
   BOOKMARKMANAGERPRIVATE_REDOINFO,
+  MEDIAGALLERIES_ADDUSERSELECTEDFOLDER,
   ENUM_BOUNDARY // Last entry: Add new entries above.
 };