Install Chrome in the Cloud Build process (#124)

* Install Chrome in the Cloud Build process

It's not in the built-in Linux apt repos so we need to manually wget it

* Update package lock file

karma.conf.js

@@ -1,6 +1,14 @@
+process.env.CHROME_BIN = require('puppeteer').executablePath()
+
 module.exports = function(config) {
   config.set({
-    browsers: ['ChromeHeadless'],
+    browsers: ['ChromeHeadlessNoSandbox'],
+    customLaunchers: {
+      ChromeHeadlessNoSandbox: {
+        base: 'ChromeHeadless',
+        flags: ['--no-sandbox']
+      }
+    },
     frameworks: ['jasmine', 'closure'],
     singleRun: true,
     autoWatch: false,

package.json

@@ -24,6 +24,7 @@
     "karma": "3.0.0",
     "karma-chrome-launcher": "^2.2.0",
     "karma-closure": "^0.1.3",
-    "karma-jasmine": "^2.0.1"
+    "karma-jasmine": "^2.0.1",
+    "puppeteer": "1.17.0"
   }
 }

release/builder/build.sh

@@ -37,7 +37,11 @@ apt-get install google-cloud-sdk-app-engine-java -y
 apt-get install git -y
 # Install docker
 apt-get install docker.io -y
-apt-get remove apt-utils locales lsb-release -y
+# Install Chrome
+apt-get install wget -y
+wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
+apt install ./google-chrome-stable_current_amd64.deb -y
+apt-get remove apt-utils locales -y
 apt-get autoclean -y
 apt-get autoremove -y
 rm -rf /var/lib/apt/lists/*