Rename StyleNonInheritedVariables::Copy to Clone.

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

Index: third_party/WebKit/Source/core/style/StyleNonInheritedVariables.h
diff --git a/third_party/WebKit/Source/core/style/StyleNonInheritedVariables.h b/third_party/WebKit/Source/core/style/StyleNonInheritedVariables.h
index 6478fa6a40768ff70af39b7d3f5073f2abe5c10e..2a5e5fec5d4a334c04557afd9465d9205563ba55 100644
--- a/third_party/WebKit/Source/core/style/StyleNonInheritedVariables.h
+++ b/third_party/WebKit/Source/core/style/StyleNonInheritedVariables.h
@@ -19,7 +19,7 @@ class StyleNonInheritedVariables {
     return WTF::WrapUnique(new StyleNonInheritedVariables);
   }
 
-  std::unique_ptr<StyleNonInheritedVariables> Copy() {
+  std::unique_ptr<StyleNonInheritedVariables> Clone() {
     return WTF::WrapUnique(new StyleNonInheritedVariables(*this));
   }