Revert 69525 - Update V8 to version 3.0.3.

The Win Reliability bot has been red since about this change.
Reverting to see whether V8 is to blame.

Review URL: http://codereview.chromium.org/5977001

TBR=ager@chromium.org

Review URL: http://codereview.chromium.org/6008001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@69546 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -58,7 +58,7 @@ deps = {
     (Var("googlecode_url") % "gyp") + "/trunk@857",
 
   "src/v8":
-    (Var("googlecode_url") % "v8") + "/trunk@6061",
+    (Var("googlecode_url") % "v8") + "/trunk@6029",
 
   "src/native_client":
     Var("nacl_trunk") + "/src/native_client@" + Var("nacl_revision"),