Fix macOS install script PRODUCT_NAME

For getting the right value, the bash script needed
proper quoting. Without it, defaultd did not give
a correct value.

Bug: 1109362
Change-Id: I80239c5e816ffe3702aa48190f1750c81cf40511
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2318000Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Michael Chang <donchan@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#792770}

chrome/updater/mac/.install.sh

@@ -303,7 +303,7 @@ main() {
   readonly APP_PLIST="${CONTENTS_DIR}/Info"
   readonly BUNDLE_NAME_KEY="CFBundleDisplayName"
   readonly PRODUCT_NAME=\
-"$(infoplist_read ${APP_DIR}/${APP_PLIST} ${BUNDLE_NAME_KEY})"
+"$(infoplist_read "${installed_app_path}/${APP_PLIST}" "${BUNDLE_NAME_KEY}")"
   readonly FRAMEWORK_NAME="${PRODUCT_NAME} Framework"
   readonly FRAMEWORK_DIR="${FRAMEWORK_NAME}.framework"
   readonly VERSIONS_DIR_NEW=\