Backout 653ead886844 (bug 1118051) for causing bug 1130067.

layout/base/nsDisplayList.h

@@ -2642,9 +2642,7 @@ public:
   virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) MOZ_OVERRIDE
   {
     *aSnap = false;
-    // We don't want to report that we take up any space so we don't expand any
-    // layer bounds.
-    return nsRect();
+    return mHitRegion.GetBounds().Union(mMaybeHitRegion.GetBounds());
   }
 
   NS_DISPLAY_DECL_NAME("LayerEventRegions", TYPE_LAYER_EVENT_REGIONS)

layout/reftests/bugs/reftest.list

@@ -1848,7 +1848,7 @@ test-pref(dom.webcomponents.enabled,true) == 1066554-1.html 1066554-1-ref.html
 == 1069716-1.html 1069716-1-ref.html
 == 1078262-1.html about:blank
 test-pref(layout.testing.overlay-scrollbars.always-visible,false) == 1081072-1.html 1081072-1-ref.html
-== 1081185-1.html 1081185-1-ref.html
+fuzzy-if(B2G,128,75) == 1081185-1.html 1081185-1-ref.html   # fuzzy with event-regions, see bug 1107843
 == 1097437-1.html 1097437-1-ref.html
 == 1103258-1.html 1103258-1-ref.html # assertion crash test with layers culling test
 == 1105137-1.html 1105137-1-ref.html