Track reasons for |Node::SetNeedsStyleRecalc|

Source/core/dom/Fullscreen.cpp

Index: Source/core/dom/Fullscreen.cpp
diff --git a/Source/core/dom/Fullscreen.cpp b/Source/core/dom/Fullscreen.cpp
index 14dbbd8614dd40befb4c00aefa5aea233ee679a1..24dc382b73e443bd76ec8a97e13226f9f28612c6 100644
--- a/Source/core/dom/Fullscreen.cpp
+++ b/Source/core/dom/Fullscreen.cpp
@@ -437,7 +437,7 @@ void Fullscreen::didEnterFullScreenForElement(Element* element)
     m_fullScreenElement->setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(true);
 
     // FIXME: This should not call updateStyleIfNeeded.
-    document()->setNeedsStyleRecalc(SubtreeStyleChange);
+    document()->setNeedsStyleRecalc(StyleRecalcDueToFullScreen, SubtreeStyleChange);
     document()->updateRenderTreeIfNeeded();
 
     m_fullScreenElement->didBecomeFullscreenElement();
@@ -463,7 +463,7 @@ void Fullscreen::didExitFullScreenForElement(Element*)
         m_fullScreenRenderer->unwrapRenderer();
 
     m_fullScreenElement = nullptr;
-    document()->setNeedsStyleRecalc(SubtreeStyleChange);
+    document()->setNeedsStyleRecalc(StyleRecalcDueToFullScreen, SubtreeStyleChange);
 
     // When fullyExitFullscreen is called, we call exitFullscreen on the topDocument(). That means
     // that the events will be queued there. So if we have no events here, start the timer on the