Fix a few bugs in the google3 sync scripts.

tools/sync_google3.sh

 #!/bin/bash
 # Copyright 2014 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Syncs //depot/google3/third_party/skia/HEAD to the last known good revision of
 # Skia. If this script is not run from a Piper client, creates a new CitC
 # client. Also updates README.google.
 #
 # Usage:
 #      ./tools/sync_google3.sh
 
 source gbash.sh || exit
 
 set -x -e
 
 MY_DIR="$(gbash::get_absolute_caller_dir)"
 LKGR="$(${MY_DIR}/get_skia_lkgr.sh)"
 
 gbash::get_google3_dir && GOOGLE3="$(gbash::get_google3_dir)"
 if [ -z "${GOOGLE3}" ]; then
   CLIENT_NAME="sync_skia_$(date '+%F-%H-%M-%S')"
   ${MY_DIR}/create_skia_google3_client.sh "${CLIENT_NAME}"
   GOOGLE3="/google/src/cloud/${USER}/${CLIENT_NAME}/google3"
 fi
 cd "${GOOGLE3}/third_party/skia/HEAD"
-${MY_DIR}/git_clone_to_google3.sh --skia-rev "${LKGR}"
+${MY_DIR}/git_clone_to_google3.sh --skia_rev "${LKGR}"
 
 # Update README.google.
 sed --in-place "s/^Version: .*/Version: ${LKGR}/" README.google
 sed --in-place "s/URL: http:\/\/skia.googlesource.com\/skia\/+archive\/.*\.tar\.gz/URL: http:\/\/skia.googlesource.com\/skia\/+archive\/${LKGR}.tar.gz/" README.google
 CURRENT_DATE=`date '+%d %B %Y'`
 echo "Updated using sync_google3.sh on $CURRENT_DATE by $USER@google.com" >> README.google
 
 # Add README.google to the default change.
 g4 reopen
 # Create a new CL.
 CHANGE="$(g4 change --desc "Update skia HEAD to ${LKGR}.")"
 CL="$(echo "${CHANGE}" | sed "s/Change \([0-9]\+\) created.*/\1/")"
 
 # Run TAP.
 tap_presubmit -c "${CL}" -p skia