Roll OTS: r30->r31

TEST=none
BUG=none

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@52357 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -83,7 +83,7 @@ deps = {
     Var("webkit_trunk") + "/WebKitTools/Scripts@" + Var("webkit_revision"),
 
   "src/third_party/ots":
-    "http://ots.googlecode.com/svn/trunk@30",
+    "http://ots.googlecode.com/svn/trunk@31",
 
   "src/tools/page_cycler/acid3":
     "/trunk/deps/page_cycler/acid3@19546",