Revert 75361 - ots roll (to r52)

75361 seems to introduce new crashes caught by reliability:

"anonymous namespace'::purecall____invalid_parameter_noinfo___ots::parselookuplisttable"

BUG=none
TEST=ran try

Review URL: http://codereview.chromium.org/6539010

TBR=bashi@chromium.org
Review URL: http://codereview.chromium.org/6542010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@75372 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -96,7 +96,7 @@ deps = {
     Var("webkit_trunk") + "/Tools/Scripts@" + Var("webkit_revision"),
 
   "src/third_party/ots":
-    (Var("googlecode_url") % "ots") + "/trunk@52",
+    (Var("googlecode_url") % "ots") + "/trunk@50",
 
   "src/tools/page_cycler/acid3":
     "/trunk/deps/page_cycler/acid3@19546",