Revert accidental dartium code push

dartium_tools/roll_webkit.sh

-#!/bin/bash -e
-
-# Copyright (c) 2012 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# This script does WebKit roll provided old and new svn revisions.
-
-gitSha() {
-  git log --format=%h --grep "git-svn-id: svn://svn.chromium.org/blink/trunk@${1}" blink/master
-}
-
-git checkout master
-git svn rebase
-git fetch blink
-
-old_svn_rev=$1
-new_svn_rev=$2
-
-old_rev="$(gitSha $old_svn_rev)"
-new_rev="$(gitSha $new_svn_rev)"
-
-merge_branch_name="merge-${old_svn_rev}-${new_svn_rev}"
-
-git checkout -b ${merge_branch_name} ${old_rev}
-git diff ${old_rev} ${new_rev} --binary | git apply --binary --index
-# git cherry-pick --no-commit ${old_rev}..${new_rev}
-git commit -m "MERGE: ${old_svn_rev}-${new_svn_rev}."
-git rebase --onto master ${merge_branch_name}~1 ${merge_branch_name}
-