I5849 incremental account security (#6874)

* Implements ability to defer seed phrase backup to later

* Adds incremental-security.spec.js, including test dapp that sends signed tx with stand alone localhost provider

* Update metamask-responsive-ui for incremental account security changes

* Update backup-notification style and fix responsiveness of seed phrase screen

* Remove uneeded files from send-eth-with-private-key-test/

* Apply linguist flags in .gitattributes for send-eth-with-private-key-test/ethereumjs-tx.js

* Improve docs in controllers/onboarding.js

* Clean up metamask-extension/test/e2e/send-eth-with-private-key-test/index.html

* Remove unnecessary newlines in a couple first-time-flow/ files

* Fix import of backup-notification in home.component

* Fix git attrs file

1 files changed, 43 insertions, 0 deletions

diff --git a/app/scripts/controllers/onboarding.js b/app/scripts/controllers/onboarding.js
new file mode 100644
index 000000000..18fec4993
--- /dev/null
+++ b/app/scripts/controllers/onboarding.js
@@ -0,0 +1,43 @@
+const ObservableStore = require('obs-store')
+const extend = require('xtend')
+
+/**
+ * @typedef {Object} InitState
+ * @property {Boolean} seedPhraseBackedUp Indicates whether the user has completed the seed phrase backup challenge
+ */
+
+/**
+ * @typedef {Object} OnboardingOptions
+ * @property {InitState} initState The initial controller state
+ */
+
+/**
+ * Controller responsible for maintaining
+ * a cache of account balances in local storage
+ */
+class OnboardingController {
+  /**
+   * Creates a new controller instance
+   *
+   * @param {OnboardingOptions} [opts] Controller configuration parameters
+   */
+  constructor (opts = {}) {
+    const initState = extend({
+      seedPhraseBackedUp: null,
+    }, opts.initState)
+    this.store = new ObservableStore(initState)
+  }
+
+  setSeedPhraseBackedUp (newSeedPhraseBackUpState) {
+    this.store.updateState({
+      seedPhraseBackedUp: newSeedPhraseBackUpState,
+    })
+  }
+
+  getSeedPhraseBackedUp () {
+    return this.store.getState().seedPhraseBackedUp
+  }
+
+}
+
+module.exports = OnboardingController