--- a/layout/base/nsRefreshDriver.cpp
+++ b/layout/base/nsRefreshDriver.cpp
@@ -140,17 +140,16 @@ namespace mozilla {
  * start/stop whatever timer mechanism is in use, and ScheduleNextTick
  * is called at the start of the Tick() implementation to set a time
  * for the next tick.
  */
 class RefreshDriverTimer {
 public:
   RefreshDriverTimer()
     : mLastFireEpoch(0)
-    , mLastFireSkipped(false)
   {
   }
 
   virtual ~RefreshDriverTimer()
   {
     MOZ_ASSERT(mContentRefreshDrivers.Length() == 0, "Should have removed all content refresh drivers from here by now!");
     MOZ_ASSERT(mRootRefreshDrivers.Length() == 0, "Should have removed all root refresh drivers from here by now!");
   }
@@ -228,21 +227,16 @@ public:
     aNewTimer->mLastFireEpoch = mLastFireEpoch;
     aNewTimer->mLastFireTime = mLastFireTime;
 
     StopTimer();
   }
 
   virtual TimeDuration GetTimerRate() = 0;
 
-  bool LastTickSkippedAnyPaints() const
-  {
-    return mLastFireSkipped;
-  }
-
   TimeStamp GetIdleDeadlineHint(TimeStamp aDefault)
   {
     MOZ_ASSERT(NS_IsMainThread());
 
     TimeStamp mostRecentRefresh = MostRecentRefresh();
     TimeDuration refreshRate = GetTimerRate();
     TimeStamp idleEnd = mostRecentRefresh + refreshRate;
 
@@ -300,31 +294,28 @@ protected:
     nsTArray<RefPtr<nsRefreshDriver>> drivers(aDrivers);
     for (nsRefreshDriver* driver : drivers) {
       // don't poke this driver if it's in test mode
       if (driver->IsTestControllingRefreshesEnabled()) {
         continue;
       }
 
       TickDriver(driver, aJsNow, aNow);
-
-      mLastFireSkipped = mLastFireSkipped || driver->mSkippedPaints;
     }
   }
 
   /*
    * Tick the refresh drivers based on the given timestamp.
    */
   void Tick(int64_t jsnow, TimeStamp now)
   {
     ScheduleNextTick(now);
 
     mLastFireEpoch = jsnow;
     mLastFireTime = now;
-    mLastFireSkipped = false;
 
     LOG("[%p] ticking drivers...", this);
     // RD is short for RefreshDriver
     AUTO_PROFILER_TRACING("Paint", "RefreshDriverTick");
 
     TickRefreshDrivers(jsnow, now, mContentRefreshDrivers);
     TickRefreshDrivers(jsnow, now, mRootRefreshDrivers);
 
@@ -333,17 +324,16 @@ protected:
 
   static void TickDriver(nsRefreshDriver* driver, int64_t jsnow, TimeStamp now)
   {
     LOG(">> TickDriver: %p (jsnow: %" PRId64 ")", driver, jsnow);
     driver->Tick(jsnow, now);
   }
 
   int64_t mLastFireEpoch;
-  bool mLastFireSkipped;
   TimeStamp mLastFireTime;
   TimeStamp mTargetTime;
 
   nsTArray<RefPtr<nsRefreshDriver>> mContentRefreshDrivers;
   nsTArray<RefPtr<nsRefreshDriver>> mRootRefreshDrivers;
 
   // useful callback for nsITimer-based derived classes, here
   // bacause of c++ protected shenanigans
@@ -941,27 +931,25 @@ protected:
   {
     int64_t jsnow = JS_Now();
     TimeStamp now = TimeStamp::Now();
 
     ScheduleNextTick(now);
 
     mLastFireEpoch = jsnow;
     mLastFireTime = now;
-    mLastFireSkipped = false;
 
     nsTArray<RefPtr<nsRefreshDriver>> drivers(mContentRefreshDrivers);
     drivers.AppendElements(mRootRefreshDrivers);
     size_t index = mNextDriverIndex;
 
     if (index < drivers.Length() &&
         !drivers[index]->IsTestControllingRefreshesEnabled())
     {
       TickDriver(drivers[index], jsnow, now);
-      mLastFireSkipped = mLastFireSkipped || drivers[index]->SkippedPaints();
     }
 
     mNextDriverIndex++;
   }
 
   static void TimerTickOne(nsITimer* aTimer, void* aClosure)
   {
     InactiveRefreshDriverTimer *timer = static_cast<InactiveRefreshDriverTimer*>(aClosure);

--- a/layout/base/nsRefreshDriver.h
+++ b/layout/base/nsRefreshDriver.h
@@ -388,21 +388,16 @@ public:
    * tick is missed.
    */
   static mozilla::Maybe<mozilla::TimeStamp> GetNextTickHint();
 
   static void DispatchIdleRunnableAfterTick(nsIRunnable* aRunnable,
                                             uint32_t aDelay);
   static void CancelIdleRunnable(nsIRunnable* aRunnable);
 
-  bool SkippedPaints() const
-  {
-    return mSkippedPaints;
-  }
-
   void NotifyDOMContentLoaded();
 
 private:
   typedef nsTObserverArray<nsARefreshObserver*> ObserverArray;
   typedef nsTArray<RefPtr<mozilla::Runnable>> ScrollEventArray;
   typedef nsTHashtable<nsISupportsHashKey> RequestTable;
   struct ImageStartData {
     ImageStartData()