Avoid unnecessary relayout of floats when not paginated.

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

Index: third_party/WebKit/Source/core/layout/LayoutBox.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.h b/third_party/WebKit/Source/core/layout/LayoutBox.h
index 50f69118e2d7629b70ce5cda9e9309ed16c2c712..c2f91e860f112e43f4dfc09b3648791de5e93a0a 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.h
@@ -1095,10 +1095,9 @@ class CORE_EXPORT LayoutBox : public LayoutBoxModelObject {
   bool shrinkToAvoidFloats() const;
   virtual bool avoidsFloats() const;
 
-  void updateFragmentationInfoForChild(LayoutBox& child);
-
-  void markChildForPaginationRelayoutIfNeeded(LayoutBox& child,
-                                              SubtreeLayoutScope&);
+  void updateFragmentationInfoForChild(LayoutBox&);
+  bool childNeedsRelayoutForPagination(const LayoutBox&) const;
+  void markChildForPaginationRelayoutIfNeeded(LayoutBox&, SubtreeLayoutScope&);
 
   bool isWritingModeRoot() const {
     return !parent() ||