[SPInvalidation] Update paint properties when full screen status changes

third_party/WebKit/Source/core/frame/FrameView.cpp

Index: third_party/WebKit/Source/core/frame/FrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index 9ea6758d5cbf4e847ae86cf40f4c44fccd4e7b08..f2c3c61e6c76b046d1c5e1b7eda4ee2a7b799425 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -655,10 +655,6 @@ void FrameView::setContentsSize(const IntSize& size) {
   updateScrollbars();
   ScrollableArea::contentsResized();
 
-  if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled() &&
-      !RuntimeEnabledFeatures::rootLayerScrollingEnabled())
-    setNeedsPaintPropertyUpdate();
-
   Page* page = frame().page();
   if (!page)
     return;
@@ -4017,6 +4013,9 @@ void FrameView::updateScrollbars() {
   if (RuntimeEnabledFeatures::rootLayerScrollingEnabled())
     return;
 
+  if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled())
+    setNeedsPaintPropertyUpdate();

[Xianzhu, 2016/12/21 23:46:34]

This is moved here because updateScrollbars() is called when scroll paint
properties may change, e.g. from setScrollbarMode() which affects
userScrollable(Horizontal|Vertical). Didn't find a failed case though.

+
   // Avoid drawing two sets of scrollbars when visual viewport is enabled.
   if (visualViewportSuppliesScrollbars()) {
     m_scrollbarManager.setHasHorizontalScrollbar(false);