[SPInvalidation] Update paint properties when full screen status changes

third_party/WebKit/Source/core/dom/Fullscreen.cpp

Index: third_party/WebKit/Source/core/dom/Fullscreen.cpp
diff --git a/third_party/WebKit/Source/core/dom/Fullscreen.cpp b/third_party/WebKit/Source/core/dom/Fullscreen.cpp
index 40cc448ea83432ef3af4c7b89bb3ee7d81c14073..1360deb41651440382f8310cb768a453f64035e3 100644
--- a/third_party/WebKit/Source/core/dom/Fullscreen.cpp
+++ b/third_party/WebKit/Source/core/dom/Fullscreen.cpp
@@ -34,6 +34,7 @@
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/StyleEngine.h"
 #include "core/events/Event.h"
+#include "core/frame/FrameView.h"
 #include "core/frame/HostsUsingFeatures.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
@@ -894,6 +895,14 @@ void Fullscreen::fullscreenElementChanged(Element* fromElement,
     // https://crbug.com/668758
     frame->eventHandler().scheduleHoverStateUpdate();
     frame->chromeClient().fullscreenElementChanged(fromElement, toElement);
+
+    if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled() &&
+        !RuntimeEnabledFeatures::rootLayerScrollingEnabled()) {
+      // Fullscreen status affects scroll paint properties through
+      // FrameView::userInputScrollable().
+      if (FrameView* frameView = frame->view())
+        frame->view()->setNeedsPaintPropertyUpdate();

[pdr., 2016/12/22 00:37:16]

nit: use the local variable:
if (FrameView* frameView = frame->view())
  frameView->setNeedsPaintPropertyUpdate();

[Xianzhu, 2016/12/22 00:45:29]

Done.

+    }
   }
 
   // TODO(foolip): This should not call updateStyleAndLayoutTree.