fix(platform): fire cordova platform.ready using zone

Closes #6186

ionic/platform/platform.ts

@@ -48,6 +48,13 @@ export class Platform {
     this._readyPromise = new Promise(res => { this._readyResolve = res; } );
   }
 
+  /**
+   * @private
+   */
+  setZone(zone: NgZone) {
+    this._zone = zone;
+  }
+
 
   // Methods
   // **********************************************
@@ -207,11 +214,10 @@ export class Platform {
   /**
    * @private
    */
-  prepareReady(zone: NgZone) {
+  prepareReady() {
     // this is the default prepareReady if it's not replaced by the engine
     // if there was no custom ready method from the engine
     // then use the default DOM ready
-    this._zone = zone;
     ready(this.triggerReady.bind(this));
   }
 

ionic/platform/registry.ts

@@ -106,7 +106,7 @@ Platform.register({
     swipeBackEnabled: isIOSDevice,
     swipeBackThreshold: 40,
     tapPolyfill: isIOSDevice,
-    virtualScrollEventAssist: !(window.indexedDB)
+    virtualScrollEventAssist: !(win.indexedDB)
   },
   isMatch(p: Platform): boolean {
     return p.isPlatformMatch('ios', ['iphone', 'ipad', 'ipod'], ['windows phone']);
@@ -172,7 +172,7 @@ Platform.register({
       // 1) ionic bootstrapped
       windowLoad(function() {
         // 2) window onload triggered or completed
-        doc.addEventListener('deviceready', () => {
+        doc.addEventListener('deviceready', function() {
           // 3) cordova deviceready event triggered
 
           // add cordova listeners to fire platform events