Bug 1405353 - stop using nsAutoPtr in nsGlobalWindow; r=mystor

UniquePtr is better.

dom/base/nsGlobalWindow.cpp

@@ -9893,7 +9893,7 @@ nsGlobalWindow::CacheXBLPrototypeHandler(nsXBLPrototypeHandler* aKey,
                                          JS::Handle<JSObject*> aHandler)
 {
   if (!mCachedXBLPrototypeHandlers) {
-    mCachedXBLPrototypeHandlers = new XBLPrototypeHandlerTable();
+    mCachedXBLPrototypeHandlers = MakeUnique<XBLPrototypeHandlerTable>();
     PreserveWrapper(ToSupports(this));
   }
 
@@ -13526,7 +13526,7 @@ nsGlobalWindow::EnableOrientationChangeListener()
   if (!nsContentUtils::ShouldResistFingerprinting(mDocShell) &&
       !mOrientationChangeObserver) {
     mOrientationChangeObserver =
-      new WindowOrientationObserver(this);
+      MakeUnique<WindowOrientationObserver>(this);
   }
 }
 

dom/base/nsGlobalWindow.h

@@ -1982,7 +1982,7 @@ protected:
   nsCOMPtr<nsIDOMOfflineResourceList> mApplicationCache;
 
   using XBLPrototypeHandlerTable = nsJSThingHashtable<nsPtrHashKey<nsXBLPrototypeHandler>, JSObject*>;
-  nsAutoPtr<XBLPrototypeHandlerTable> mCachedXBLPrototypeHandlers;
+  mozilla::UniquePtr<XBLPrototypeHandlerTable> mCachedXBLPrototypeHandlers;
 
   // mSuspendedDoc is only set on outer windows. It's useful when we get matched
   // EnterModalState/LeaveModalState calls, in which case the outer window is
@@ -2015,7 +2015,7 @@ protected:
   nsTArray<uint32_t> mEnabledSensors;
 
 #if defined(MOZ_WIDGET_ANDROID)
-  nsAutoPtr<mozilla::dom::WindowOrientationObserver> mOrientationChangeObserver;
+  mozilla::UniquePtr<mozilla::dom::WindowOrientationObserver> mOrientationChangeObserver;
 #endif
 
 #ifdef MOZ_WEBSPEECH