import changes from `dev' branch of rmottola/Arctic-Fox:

- Bug 1235830 - Renaming GetInternalNSEvent to WidgetEvent, in nsIDOMEvent r=smaug (cc4346fac9)
- Bug 1235899 - Don't allow frame reconstruction to clobber the APZ scroll offset. r=botond (4c4de0dedd)
- Bug 1073224 - [1.2] Use SENSOR_ROTATION_VECTOR for DOM DeviceOrientation events on Android. r=vlad (0362a236bc)
- Bug 1073224 - [2.1] Accept rotation vector device sensor listeners in tests. r=vlad (de453a3439)
- Bug 1205649 - [1.1] Use relative orientation for DOM DeviceOrientation events by default. r=vlad (cf903846b3)
- Bug 1205649 - [2.4] Add AbsoluteDeviceOrientation DOM event for compass heading orientation data. r=smaug (fa19ea545f)

dom/base/nsContentUtils.cpp

@@ -3808,7 +3808,7 @@ nsContentUtils::DispatchEvent(nsIDocument* aDoc, nsISupports* aTarget,
                                   aCancelable, aTrusted, getter_AddRefs(event),
                                   getter_AddRefs(target));
   NS_ENSURE_SUCCESS(rv, rv);
-  event->GetInternalNSEvent()->mFlags.mOnlyChromeDispatch = aOnlyChromeDispatch;
+  event->WidgetEventPtr()->mFlags.mOnlyChromeDispatch = aOnlyChromeDispatch;
 
   bool dummy;
   return target->DispatchEvent(event, aDefaultAction ? aDefaultAction : &dummy);
@@ -4954,7 +4954,7 @@ nsContentUtils::GetAccelKeyCandidates(nsIDOMKeyEvent* aDOMKeyEvent,
     return;
 
   WidgetKeyboardEvent* nativeKeyEvent =
-    aDOMKeyEvent->AsEvent()->GetInternalNSEvent()->AsKeyboardEvent();
+    aDOMKeyEvent->AsEvent()->WidgetEventPtr()->AsKeyboardEvent();
   if (nativeKeyEvent) {
     NS_ASSERTION(nativeKeyEvent->mClass == eKeyboardEventClass,
                  "wrong type of native event");