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

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NGUnits_h
 #define NGUnits_h
 
 #include "core/CoreExport.h"
 #include "core/layout/ng/ng_writing_mode.h"
 #include "platform/LayoutUnit.h"
@@ skipping 152 matching lines @@
                                 const NGLogicalRect& value) {
   return stream << value.ToString();
 }
 
 // Struct that represents NG exclusion.
 struct CORE_EXPORT NGExclusion {
   // Type of NG exclusion.
   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.
   NGLogicalRect rect;
 
   // Type of this exclusion.
   Type type;
 };
 
 struct NGPixelSnappedPhysicalRect {
@@ skipping 75 matching lines @@
 
 // Struct to represent a simple edge that has start and end.
 struct NGEdge {
   LayoutUnit start;
   LayoutUnit end;
 };
 
 }  // namespace blink
 
 #endif  // NGUnits_h