getClientRects() shouldn't clip against any ancestors.

third_party/WebKit/Source/core/layout/FragmentainerIterator.h

Index: third_party/WebKit/Source/core/layout/FragmentainerIterator.h
diff --git a/third_party/WebKit/Source/core/layout/FragmentainerIterator.h b/third_party/WebKit/Source/core/layout/FragmentainerIterator.h
index 8f8dccee7f1b12eb9553da1028f124a9a4be99b2..caa993b5eb1f4d26e4761bf25aad3ac4355483f7 100644
--- a/third_party/WebKit/Source/core/layout/FragmentainerIterator.h
+++ b/third_party/WebKit/Source/core/layout/FragmentainerIterator.h
@@ -5,13 +5,13 @@
 #ifndef FragmentainerIterator_h
 #define FragmentainerIterator_h
 
+#include "core/layout/MultiColumnFragmentainerGroup.h"
 #include "platform/geometry/LayoutRect.h"
 
 namespace blink {
 
 class LayoutFlowThread;
 class LayoutMultiColumnSet;
-class MultiColumnFragmentainerGroup;
 
 // Used to find the fragmentainers that intersect with a given portion of the
 // flow thread. The portion typically corresponds to the bounds of some
@@ -38,13 +38,11 @@ class FragmentainerIterator {
   // flowthread to visual coordinates.
   LayoutSize paginationOffset() const;
 
-  // Return the physical content box of the current fragmentainer, relative to
-  // the flow thread.
-  LayoutRect fragmentainerInFlowThread() const;
-
   // Return the physical clip rectangle of the current fragmentainer, relative
   // to the flow thread.
-  LayoutRect clipRectInFlowThread() const;
+  LayoutRect clipRectInFlowThread(
+      MultiColumnFragmentainerGroup::ClipRectAxesSelector =
+          MultiColumnFragmentainerGroup::BothAxes) const;
 
  private:
   const LayoutFlowThread& m_flowThread;