[LayoutNG] Fix enum values to conform to kEnumName in style guide.

third_party/WebKit/Source/core/layout/ng/ng_units.h

Index: third_party/WebKit/Source/core/layout/ng/ng_units.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_units.h b/third_party/WebKit/Source/core/layout/ng/ng_units.h
index 02774a38c2412371d75d6f23bc351e41b5e1ae3b..95151cc9e863cfc917fade2a82b04378dd7993f2 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_units.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_units.h
@@ -170,11 +170,11 @@ struct CORE_EXPORT NGExclusion {
   enum Type {
     // Undefined exclusion type.
     // At this moment it's also used to represent CSS3 exclusion.
-    NG_EXCLUSION_TYPE_UNDEFINED = 0,
+    kExclusionTypeUndefined = 0,
     // Exclusion that is created by LEFT float.
-    NG_FLOAT_LEFT = 1,
+    kFloatLeft = 1,
     // Exclusion that is created by RIGHT float.
-    NG_FLOAT_RIGHT = 2
+    kFloatRight = 2
   };
 
   // Rectangle in logical coordinates the represents this exclusion.