fix(platform): pass original event in EventEmitter

src/platform/platform.ts

@@ -302,9 +302,7 @@ export class Platform {
   // called by engines (the browser)that do not provide them
 
   /**
-  * The `exitApp` method is useful when running from a native platform,
-  * such as Cordova. This adds the ability to place the Cordova app
-  * in the background.
+  * @private
   */
   exitApp() {}
 
@@ -321,22 +319,22 @@ export class Platform {
   * app's back button within the navbar is clicked, but this event is only
   * referencing the platform's hardward back button.
   */
-  backButton: EventEmitter<any> = new EventEmitter();
+  backButton: EventEmitter<Event> = new EventEmitter();
 
   /**
   * The pause event emits when the native platform puts the application
   * into the background, typically when the user switches to a different
   * application. This event would emit when a Cordova app is put into
   * the background, however, it would not fire on a standard web browser.
   */
-  pause: EventEmitter<any> = new EventEmitter();
+  pause: EventEmitter<Event> = new EventEmitter();
 
   /**
   * The resume event emits when the native platform pulls the application
   * out from the background. This event would emit when a Cordova app comes
   * out from the background, however, it would not fire on a standard web browser.
   */
-  resume: EventEmitter<any> = new EventEmitter();
+  resume: EventEmitter<Event> = new EventEmitter();
 
 
   // Getter/Setter Methods

src/platform/registry.ts

@@ -176,14 +176,14 @@ Platform.register({
           // 3) cordova deviceready event triggered
 
           // add cordova listeners to emit platform events
-          doc.addEventListener('backbutton', function() {
-            p.backButton.emit(null);
+          doc.addEventListener('backbutton', function(ev: Event) {
+            p.backButton.emit(ev);
           });
-          doc.addEventListener('pause', function() {
-            p.pause.emit(null);
+          doc.addEventListener('pause', function(ev: Event) {
+            p.pause.emit(ev);
           });
-          doc.addEventListener('resume', function() {
-            p.resume.emit(null);
+          doc.addEventListener('resume', function(ev: Event) {
+            p.resume.emit(ev);
           });
 
           // cordova has its own exitApp method