Backed out changeset b2b359340a84 (bug 1283302) for causing talos regressions.

MozReview-Commit-ID: FloqgtgNZRZ

layout/base/nsPresShell.h

@@ -67,13 +67,9 @@ typedef nsClassHashtable<nsUint64HashKey, mozilla::CSSIntRegion> VisibleRegions;
 
 } // namespace mozilla
 
-// This is actually pref-controlled, but we use this value if we fail
+// 250ms.  This is actually pref-controlled, but we use this value if we fail
 // to get the pref for any reason.
-#ifdef MOZ_WIDGET_ANDROID
 #define PAINTLOCK_EVENT_DELAY 250
-#else
-#define PAINTLOCK_EVENT_DELAY 5
-#endif
 
 class PresShell final : public nsIPresShell,
                         public nsStubDocumentObserver,