backout Bug 1297367 because of tart regression, r=backout

dom/base/nsJSEnvironment.cpp

@@ -2581,44 +2581,6 @@ void
 nsJSContext::NotifyDidPaint()
 {
   sDidPaintAfterPreviousICCSlice = true;
-  if (sICCTimer) {
-    static uint32_t sCount = 0;
-    // 16 here is the common value for refresh driver tick frequency.
-    static const uint32_t kTicksPerSliceDelay = kICCIntersliceDelay / 16;
-    if (++sCount % kTicksPerSliceDelay != 0) {
-      // Don't trigger CC slice all the time after paint, but often still.
-      // The key point is to trigger it right after paint, especially when
-      // we're running RefreshDriver constantly.
-      return;
-    }
-
-    sICCTimer->Cancel();
-    ICCTimerFired(nullptr, nullptr);
-    if (sICCTimer) {
-      sICCTimer->InitWithNamedFuncCallback(ICCTimerFired, nullptr,
-                                           kICCIntersliceDelay,
-                                           nsITimer::TYPE_REPEATING_SLACK,
-                                           "ICCTimerFired");
-    }
-  } else if (sCCTimer) {
-    static uint32_t sCount = 0;
-    static const uint32_t kTicksPerForgetSkippableDelay =
-      NS_CC_SKIPPABLE_DELAY / 16;
-    if (++sCount % kTicksPerForgetSkippableDelay != 0) {
-      // The comment above about triggering CC slice applies to forget skippable
-      // too.
-      return;
-    }
-
-    sCCTimer->Cancel();
-    CCTimerFired(nullptr, nullptr);
-    if (sCCTimer) {
-      sCCTimer->InitWithNamedFuncCallback(CCTimerFired, nullptr,
-                                          NS_CC_SKIPPABLE_DELAY,
-                                          nsITimer::TYPE_REPEATING_SLACK,
-                                          "CCTimerFired");
-    }
-  }
 }
 
 nsScriptNameSpaceManager*

layout/base/nsRefreshDriver.cpp

@@ -1876,7 +1876,6 @@ nsRefreshDriver::Tick(int64_t aNowEpoch, TimeStamp aNowTime)
   }
   mPresShellsToInvalidateIfHidden.Clear();
 
-  bool notifyGC = false;
   if (mViewManagerFlushIsPending) {
     RefPtr<TimelineConsumers> timelines = TimelineConsumers::Get();
 
@@ -1912,7 +1911,10 @@ nsRefreshDriver::Tick(int64_t aNowEpoch, TimeStamp aNowTime)
       timelines->AddMarkerForDocShell(docShell, "Paint",  MarkerTracingType::END);
     }
 
-    notifyGC = true;
+    if (nsContentUtils::XPConnect()) {
+      nsContentUtils::XPConnect()->NotifyDidPaint();
+      nsJSContext::NotifyDidPaint();
+    }
   }
 
 #ifndef ANDROID  /* bug 1142079 */
@@ -1932,11 +1934,6 @@ nsRefreshDriver::Tick(int64_t aNowEpoch, TimeStamp aNowTime)
   if (mPresContext->IsRoot() && XRE_IsContentProcess() && gfxPrefs::AlwaysPaint()) {
     ScheduleViewManagerFlush();
   }
-
-  if (notifyGC && nsContentUtils::XPConnect()) {
-    nsContentUtils::XPConnect()->NotifyDidPaint();
-    nsJSContext::NotifyDidPaint();
-  }
 }
 
 void