Opens the original webpage from where installation of MetaMask was re… (#6272)

* Opens the original webpage from where installation of MetaMask was requested

* Asking for dynamic permissions

* code for forwarder/without extra permissions

* Lint fix for onboardingComplete message sending code.

app/scripts/inpage.js

@@ -218,6 +218,12 @@ inpageProvider.publicConfigStore.subscribe(function (state) {
   web3.eth.defaultAccount = state.selectedAddress
 })
 
+inpageProvider.publicConfigStore.subscribe(function (state) {
+  if (state.onboardingcomplete) {
+    window.postMessage('onboardingcomplete', '*')
+  }
+})
+
 // need to make sure we aren't affected by overlapping namespaces
 // and that we dont affect the app with our namespace
 // mostly a fix for web3's BigNumber if AMD's "define" is defined...

app/scripts/metamask-controller.js

@@ -320,6 +320,7 @@ module.exports = class MetamaskController extends EventEmitter {
       const result = {
         selectedAddress: memState.isUnlocked ? memState.selectedAddress : undefined,
         networkVersion: memState.network,
+        onboardingcomplete: memState.completedOnboarding,
       }
       return result
     }