revert: ci: use chrome stable (#18307)

This reverts commit 8bcb268140.

aio/scripts/test-pwa-score.js

@@ -19,6 +19,11 @@ const config = require('lighthouse/lighthouse-core/config/default.js');
 // Constants
 const VIEWER_URL = 'https://googlechrome.github.io/lighthouse/viewer/';
 
+// Specify the path to Chrome on Travis
+if (process.env.TRAVIS) {
+  process.env.LIGHTHOUSE_CHROMIUM_PATH = process.env.CHROME_BIN;
+}
+
 // Run
 _main(process.argv.slice(2));
 

aio/tools/examples/shared/protractor.config.js

@@ -20,7 +20,11 @@ exports.config = {
 
   // Capabilities to be passed to the webdriver instance.
   capabilities: {
-    'browserName': 'chrome'
+    'browserName': 'chrome',
+    // For Travis
+    chromeOptions: {
+      binary: process.env.CHROME_BIN
+    }
   },
 
   // Framework to use. Jasmine is recommended.