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

third_party/WebKit/Source/core/layout/ng/ng_fragment.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 NGFragment_h
 #define NGFragment_h
 
 #include "core/CoreExport.h"
 #include "core/layout/ng/ng_fragment_base.h"
 #include "core/layout/ng/ng_constraint_space.h"
@@ skipping 12 matching lines @@
              TextDirection direction,
              NGPhysicalFragment* physical_fragment)
       : NGFragmentBase(writing_mode, direction, physical_fragment) {}
 
   NGMarginStrut MarginStrut() const;
 };
 
 DEFINE_TYPE_CASTS(NGFragment,
                   NGFragmentBase,
                   fragment,
-                  fragment->Type() == NGPhysicalFragmentBase::FragmentBox,
-                  fragment.Type() == NGPhysicalFragmentBase::FragmentBox);
+                  fragment->Type() == NGPhysicalFragmentBase::kFragmentBox,
+                  fragment.Type() == NGPhysicalFragmentBase::kFragmentBox);
 
 }  // namespace blink
 
 #endif  // NGFragment_h