Jump to the next outer column when an inner column is too short.

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

Index: third_party/WebKit/Source/core/layout/LayoutBlock.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlock.h b/third_party/WebKit/Source/core/layout/LayoutBlock.h
index 729dbacfe318dfa13d7b862aadf2eefb19b8590e..d0e54aeba07150cfdeac9ed219b9e472791b3b9e 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlock.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBlock.h
@@ -436,6 +436,12 @@ public:
     LayoutUnit pageLogicalHeightForOffset(LayoutUnit) const;
     LayoutUnit pageRemainingLogicalHeightForOffset(LayoutUnit, PageBoundaryRule) const;
 
+    // Calculate the strut to insert in order fit content of size |contentLogicalHeight|.
+    // |strutToNextPage| is the strut to add to |offset| to merely get to the top of the next page
+    // or column. This is what will be returned if the content can actually fit there. Otherwise,
+    // return the distance to the next fragmentainer that can fit this piece of content.
+    LayoutUnit calculatePaginationStrutToFitContent(LayoutUnit offset, LayoutUnit strutToNextPage, LayoutUnit contentLogicalHeight) const;
+
 protected:
     bool isPageLogicalHeightKnown(LayoutUnit logicalOffset) const { return pageLogicalHeightForOffset(logicalOffset); }