Before finalizing scroll dimensions, check again whether we need scrollbars

third_party/WebKit/Source/core/layout/LayoutBlock.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBlock.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlock.cpp b/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
index a5bddc7c01d202376d3c66fc39312774ae96ea34..79a9b1c185596b61a4e25c80e20f1ff68167778e 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
@@ -110,6 +110,7 @@ static TrackedContainerMap* gPositionedContainerMap = nullptr;
 static TrackedContainerMap* gPercentHeightContainerMap = nullptr;
 
 struct ScrollInfo {
+    ScrollInfo() : autoHorizontalScrollBarChanged(false), autoVerticalScrollBarChanged(false) {}
     DoubleSize scrollOffset;
     bool autoHorizontalScrollBarChanged;
     bool autoVerticalScrollBarChanged;
@@ -868,6 +869,7 @@ void LayoutBlock::finishDelayUpdateScrollInfo()
             if (block.key->hasOverflowClip()) {
                 PaintLayerScrollableArea* scrollableArea = block.key->layer()->scrollableArea();
                 ScrollInfo& scrollInfo = block.value;
+                scrollableArea->updateScrollDimensions(scrollInfo.scrollOffset, scrollInfo.autoHorizontalScrollBarChanged, scrollInfo.autoVerticalScrollBarChanged);
                 scrollableArea->finalizeScrollDimensions(scrollInfo.scrollOffset, scrollInfo.autoHorizontalScrollBarChanged, scrollInfo.autoVerticalScrollBarChanged);
             }
         }