Support edge-inclusive intersections in mapToVisibleRectInAncestorSpace

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

Index: third_party/WebKit/Source/core/layout/LayoutFlowThread.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutFlowThread.cpp b/third_party/WebKit/Source/core/layout/LayoutFlowThread.cpp
index 1cdd6fba6813e0d7198c86ab7eaaf9b65333ec9e..61a416340641fda2e73e94fabe8ce2ca841fa915 100644
--- a/third_party/WebKit/Source/core/layout/LayoutFlowThread.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutFlowThread.cpp
@@ -97,7 +97,7 @@ void LayoutFlowThread::validateColumnSets()
     generateColumnSetIntervalTree();
 }
 
-void LayoutFlowThread::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* ancestor, LayoutRect& rect, const PaintInvalidationState* paintInvalidationState) const
+bool LayoutFlowThread::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* ancestor, LayoutRect& rect, const PaintInvalidationState* paintInvalidationState, VisibleRectFlags visibleRectFlags) const
 {
     ASSERT(ancestor != this); // A flow thread should never be an invalidation container.
     // |rect| is a layout rectangle, where the block direction coordinate is flipped for writing
@@ -106,7 +106,7 @@ void LayoutFlowThread::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObjec
     flipForWritingMode(rect);
     rect = fragmentsBoundingBox(rect);
     flipForWritingMode(rect);
-    LayoutBlockFlow::mapToVisibleRectInAncestorSpace(ancestor, rect, paintInvalidationState);
+    return LayoutBlockFlow::mapToVisibleRectInAncestorSpace(ancestor, rect, paintInvalidationState, visibleRectFlags);
 }
 
 void LayoutFlowThread::layout()