Add missing data members in StyleRareNonInheritedData copy constructor.

third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h

Index: third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h
diff --git a/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h b/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h
index 2b7cf9ab4e0cf89bc39b51b02e9e1f974a18e00e..c7ed0321aec53785c1a651c20d10551f94f725cc 100644
--- a/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h
+++ b/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h
@@ -74,6 +74,8 @@ enum PageSizeType {
   PAGE_SIZE_RESOLVED         // Size is fully resolved.
 };
 
+using PaintImages = Vector<Persistent<StyleImage>>;

[meade_UTC10, 2017/05/31 05:59:45]

Do you expect PaintImages to be used by anything outside of
StyleRareNonInheritedData? If not, you probably shouldn't create an alias.

https://google.github.io/styleguide/cppguide.html#Aliases

[shend, 2017/05/31 06:58:25]

Done.

+
 // This struct is for rarely used non-inherited CSS3, CSS2, and WebKit-specific
 // properties.  By grouping them together, we save space, and only allocate this
 // object when someone actually uses one of these properties.
@@ -169,7 +171,7 @@ class CORE_EXPORT StyleRareNonInheritedData
 
   Vector<String> callback_selectors_;
 
-  std::unique_ptr<Vector<Persistent<StyleImage>>> paint_images_;
+  std::unique_ptr<PaintImages> paint_images_;
 
   std::unique_ptr<StyleNonInheritedVariables> variables_;