[chrome-devtools-frontend] Generate LASTCHANGE.blink in the uploader script

We don't use gclient, instead just check Blink directly.
Since r191116, DevTools concatenation script requires LASTCHANGE.blink.
Luckily, it's trivial to generate it ourselves.

TBR=pfeldman@chromium.org

Review URL: https://codereview.chromium.org/960873003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/chrome-devtools-frontend@294283 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/gce/uploader_iteration.sh b/gce/uploader_iteration.sh
index ce2e083..4ad8c4f 100755
--- a/gce/uploader_iteration.sh
+++ b/gce/uploader_iteration.sh
@@ -101,6 +101,11 @@
     GYP_GENERATORS=ninja ../gyp/gyp --toplevel-dir="$DEVTOOLS_DIR" --depth=../../../../devtools-frontend --generator-output=../../../../devtools-frontend "$DEVTOOLS_GYP" || exit $EXIT_GYP_DEVTOOLS
     popd
 
+    LASTCHANGE_DIR="$SOURCE_DIR/../build/util"
+    LASTCHANGE_FILE="$LASTCHANGE_DIR/LASTCHANGE.blink"
+    mkdir -p $LASTCHANGE_DIR
+    echo "LASTCHANGE=$REVISION" > $LASTCHANGE_FILE
+
     ninja -C devtools-frontend/out/Default devtools_frontend_resources || exit $EXIT_BUILD_FRONTEND
     ZIP_FILE_NAME=devtools_frontend.zip
     ZIP_FILE=$(pwd)/devtools-frontend/$ZIP_FILE_NAME