Bug 1674142 Part 2: Upgrade to a release assert in CompositorWidget::CreateLocal. r=jrmuizel

Differential Revision: https://phabricator.services.mozilla.com/D103943

widget/InProcessCompositorWidget.cpp

@@ -21,7 +21,10 @@ namespace widget {
 RefPtr<CompositorWidget> CompositorWidget::CreateLocal(
     const CompositorWidgetInitData& aInitData,
     const layers::CompositorOptions& aOptions, nsIWidget* aWidget) {
-  MOZ_ASSERT(aWidget);
+  // We're getting crashes from storing a NULL mWidget, and this is the
+  // only remaining explanation that doesn't involve memory corruption,
+  // so placing a release assert here.
+  MOZ_RELEASE_ASSERT(aWidget);
 #  ifdef MOZ_WIDGET_ANDROID
   return new AndroidCompositorWidget(aOptions,
                                      static_cast<nsBaseWidget*>(aWidget));