Roll grit to r168.

r168: Have grit survive a Windows registry with Unicode keys.
Review: https://codereview.chromium.org/253443002

R=thakis@chromium.org
BUG=365188

Review URL: https://codereview.chromium.org/310773002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274579 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -145,7 +145,7 @@ deps = {
     (Var("googlecode_url") % "snappy") + "/trunk@80",
 
   "src/tools/grit":
-    (Var("googlecode_url") % "grit-i18n") + "/trunk@167",
+    (Var("googlecode_url") % "grit-i18n") + "/trunk@168",
 
   "src/tools/gyp":
     (Var("googlecode_url") % "gyp") + "/trunk@1921",