refactor: clean up the default app implementation (#14719)

* Disable nodeIntegration
* Enable contextIsolation
* Re-implement the CSP security check to handle running in
contextIsolation
* Disable bad DCHECKS for the promise helper
* Remove the unused "-d" flag for the electron binary
* Added a way to hide the default help output for electron devs who
don't want to see it every time

default_app/menu.js

@@ -0,0 +1,194 @@
+const { shell, Menu } = require('electron')
+
+const setDefaultApplicationMenu = () => {
+  if (Menu.getApplicationMenu()) return
+
+  const template = [
+    {
+      label: 'Edit',
+      submenu: [
+        {
+          role: 'undo'
+        },
+        {
+          role: 'redo'
+        },
+        {
+          type: 'separator'
+        },
+        {
+          role: 'cut'
+        },
+        {
+          role: 'copy'
+        },
+        {
+          role: 'paste'
+        },
+        {
+          role: 'pasteandmatchstyle'
+        },
+        {
+          role: 'delete'
+        },
+        {
+          role: 'selectall'
+        }
+      ]
+    },
+    {
+      label: 'View',
+      submenu: [
+        {
+          role: 'reload'
+        },
+        {
+          role: 'forcereload'
+        },
+        {
+          role: 'toggledevtools'
+        },
+        {
+          type: 'separator'
+        },
+        {
+          role: 'resetzoom'
+        },
+        {
+          role: 'zoomin'
+        },
+        {
+          role: 'zoomout'
+        },
+        {
+          type: 'separator'
+        },
+        {
+          role: 'togglefullscreen'
+        }
+      ]
+    },
+    {
+      role: 'window',
+      submenu: [
+        {
+          role: 'minimize'
+        },
+        {
+          role: 'close'
+        }
+      ]
+    },
+    {
+      role: 'help',
+      submenu: [
+        {
+          label: 'Learn More',
+          click () {
+            shell.openExternal('https://electronjs.org')
+          }
+        },
+        {
+          label: 'Documentation',
+          click () {
+            shell.openExternal(
+              `https://github.com/electron/electron/tree/v${process.versions.electron}/docs#readme`
+            )
+          }
+        },
+        {
+          label: 'Community Discussions',
+          click () {
+            shell.openExternal('https://discuss.atom.io/c/electron')
+          }
+        },
+        {
+          label: 'Search Issues',
+          click () {
+            shell.openExternal('https://github.com/electron/electron/issues')
+          }
+        }
+      ]
+    }
+  ]
+
+  if (process.platform === 'darwin') {
+    template.unshift({
+      label: 'Electron',
+      submenu: [
+        {
+          role: 'about'
+        },
+        {
+          type: 'separator'
+        },
+        {
+          role: 'services',
+          submenu: []
+        },
+        {
+          type: 'separator'
+        },
+        {
+          role: 'hide'
+        },
+        {
+          role: 'hideothers'
+        },
+        {
+          role: 'unhide'
+        },
+        {
+          type: 'separator'
+        },
+        {
+          role: 'quit'
+        }
+      ]
+    })
+    template[1].submenu.push({
+      type: 'separator'
+    }, {
+      label: 'Speech',
+      submenu: [
+        {
+          role: 'startspeaking'
+        },
+        {
+          role: 'stopspeaking'
+        }
+      ]
+    })
+    template[3].submenu = [
+      {
+        role: 'close'
+      },
+      {
+        role: 'minimize'
+      },
+      {
+        role: 'zoom'
+      },
+      {
+        type: 'separator'
+      },
+      {
+        role: 'front'
+      }
+    ]
+  } else {
+    template.unshift({
+      label: 'File',
+      submenu: [{
+        role: 'quit'
+      }]
+    })
+  }
+
+  const menu = Menu.buildFromTemplate(template)
+  Menu.setApplicationMenu(menu)
+}
+
+module.exports = {
+  setDefaultApplicationMenu
+}