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

- Bug 1159409 - (Part 1-) - Remove Init() from the Image interface. r=tn (0b663ee45)
- Bug 1159409 - (Part 2) - Remove ProgressTrackerInit and register Images with a ProgressTracker in ImageFactory. r=tn (a24d4e849)
- Bug 1179909: Refactor stable state handling. r=smaug This is motivated by three separate but related problems: (0ead73dbd)
- remove mPreemptingRunnableInfos of PM which I couldn't trace in FF (96474c90a)
- Bug 1179909: Build fix. r=me CLOSED TREE (5d35a65d5)
- Bug 1144418 - target events for text nodes in shadow dom to the nearest element in the flattened tree. r=wchen (26c0eb8b2)
- Bug 853889 - Check single-box orientaton in _cairo_bentley_ottmann_tessellate_rectangular_traps and _cairo_bentley_ottmann_tessellate_boxes. r=jmuizelaar (a13abee2f)
- Bug 1143303 - extend D2D circle workaround to work for small circles. r=bas (1ccb1c0c1)

dom/base/nsDOMWindowUtils.cpp

@@ -88,8 +88,7 @@
 #include "nsViewportInfo.h"
 #include "nsIFormControl.h"
 #include "nsIScriptError.h"
-#include "nsIAppShell.h"
-#include "nsWidgetsCID.h"
+//#include "nsWidgetsCID.h"
 #include "FrameLayerBuilder.h"
 #include "nsDisplayList.h"
 #include "nsROCSSPrimitiveValue.h"
@@ -118,8 +117,6 @@ using namespace mozilla::gfx;
 
 class gfxContext;
 
-static NS_DEFINE_CID(kAppShellCID, NS_APPSHELL_CID);
-
 NS_INTERFACE_MAP_BEGIN(nsDOMWindowUtils)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMWindowUtils)
   NS_INTERFACE_MAP_ENTRY(nsIDOMWindowUtils)
@@ -3489,30 +3486,6 @@ nsDOMWindowUtils::DispatchEventToChromeOnly(nsIDOMEventTarget* aTarget,
   return NS_OK;
 }
 
-NS_IMETHODIMP
-nsDOMWindowUtils::RunInStableState(nsIRunnable *aRunnable)
-{
-  MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
-
-  nsCOMPtr<nsIRunnable> runnable = aRunnable;
-  nsContentUtils::RunInStableState(runnable.forget());
-
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-nsDOMWindowUtils::RunBeforeNextEvent(nsIRunnable *runnable)
-{
-  MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
-
-  nsCOMPtr<nsIAppShell> appShell(do_GetService(kAppShellCID));
-  if (!appShell) {
-    return NS_ERROR_NOT_AVAILABLE;
-  }
-
-  return appShell->RunBeforeNextEvent(runnable);
-}
-
 NS_IMETHODIMP
 nsDOMWindowUtils::RequestCompositorProperty(const nsAString& property,
                                             float* aResult)