[chrome-devtools-frontend] Fix SVN revision extraction from git-svn-id stamp

gce/uploader_iteration.sh

 #!/bin/bash
 # Copyright (c) 2013 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 enables bash to treat any unhandled non-zero exit codes as "exceptions"
 set -e
 source $(dirname $0)/uploader_exit_codes.sh
 
 mark_step() {
@@ skipping 28 matching lines @@
 mark_step 'Getting Blink revisions blacklist'
 BLINK_REVISIONS_BLACKLIST_FILE=$GS_PATH/blink_revisions_blacklist
 BLINK_REVISIONS_BLACKLIST=""
 if gsutil ls "$BLINK_REVISIONS_BLACKLIST_FILE"; then
     BLINK_REVISIONS_BLACKLIST=$(gsutil cat "$BLINK_REVISIONS_BLACKLIST_FILE")
 fi
 
 mark_step 'Working out SVN revisions list'
 pushd blink
 git fetch || exit $EXIT_BLINK_UPDATE
-HEAD_BLINK_REVISION=$(git log -n 1 --all --grep="git-svn-id:" --pretty=medium | grep -Po "git-svn-id:[^@]*@\d+" | grep -Po "\d+")
+HEAD_BLINK_REVISION=$(git log -n 1 --all --grep="git-svn-id:" --pretty=medium | grep -Po "git-svn-id:[^@]*@\d+" | grep -Po "@\d+" | grep -Po "\d+")
 popd
 echo "Last committed was Blink revision $HEAD_BLINK_REVISION"
 REVISION_LIST=$(seq $[LAST_BLINK_REVISION+1] $HEAD_BLINK_REVISION)
 if [ -z "$REVISION_LIST" ]; then
     exit $EXIT_NO_UPDATED_BRANCHES
 fi
 
 mark_step 'Building DevTools frontend for revisions and uploading to Cloud Storage'
 for REVISION in $REVISION_LIST; do
     LOCAL_STORAGE_DIR=/uploader/storage
@@ skipping 57 matching lines @@
 
     zip -9r $ZIP_FILE * || exit $EXIT_ZIP_FRONTEND
     popd
 
     ZIP_SHA1=$(sha1sum $ZIP_FILE | awk '{print $1}')
     mv $ZIP_FILE "$ZIPS_DIR/$ZIP_SHA1.zip"
     echo "$ZIP_SHA1" > "$REVS_DIR/@$REVISION"
 
     gsutil -m cp -R $LOCAL_STORAGE_DIR/* $GS_PATH || exit $EXIT_CS_UPLOAD
 done