chore(build): use Chrome by default for all JS tests

Fixes #5380

Closes #5387

scripts/ci/test_js.sh

@@ -13,5 +13,5 @@ if  ${SCRIPT_DIR}/env_dart.sh 2>&1 > /dev/null ; then
 fi
 
 ./node_modules/.bin/gulp pre-test-checks
-./node_modules/.bin/gulp test.js --browsers=${KARMA_BROWSERS:-ChromeCanary}
+./node_modules/.bin/gulp test.js --browsers=${KARMA_BROWSERS:-Chrome}
 ${SCRIPT_DIR}/test_e2e_js.sh

scripts/ci/test_router.sh

@@ -7,4 +7,4 @@ SCRIPT_DIR=$(dirname $0)
 source $SCRIPT_DIR/env_dart.sh
 cd $SCRIPT_DIR/../..
 
-./node_modules/.bin/gulp test.unit.router/ci --browsers=${KARMA_BROWSERS:-ChromeCanary}
+./node_modules/.bin/gulp test.unit.router/ci --browsers=${KARMA_BROWSERS:-Chrome}