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

third_party/WebKit/Source/core/layout/ng/ng_layout_coordinator.cc

 // 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.
 
 #include "core/layout/ng/ng_layout_coordinator.h"
 
 #include "core/layout/ng/ng_layout_input_node.h"
 #include "core/layout/ng/ng_physical_fragment_base.h"
 
 namespace blink {
 
 NGLayoutCoordinator::NGLayoutCoordinator(
     NGLayoutInputNode* input_node,
     const NGConstraintSpace* constraint_space) {
   layout_algorithms_.append(
       NGLayoutInputNode::AlgorithmForInputNode(input_node, constraint_space));
 }
 
 bool NGLayoutCoordinator::Tick(NGPhysicalFragmentBase** fragment) {
   NGLayoutAlgorithm* child_algorithm;
 
   // Tick should never be called without a layout algorithm on the stack.
   DCHECK(layout_algorithms_.size());
 
   // TODO(layout-dev): store box from last tick and pass it into Layout here.
   switch (
       layout_algorithms_.back()->Layout(nullptr, fragment, &child_algorithm)) {
-    case NotFinished:
+    case kNotFinished:
       return false;
-    case NewFragment:
+    case kNewFragment:
       layout_algorithms_.pop_back();
       return (layout_algorithms_.size() == 0);
-    case ChildAlgorithmRequired:
+    case kChildAlgorithmRequired:
       layout_algorithms_.append(child_algorithm);
       return false;
   }
 
   NOTREACHED();
   return false;
 }
 
 DEFINE_TRACE(NGLayoutCoordinator) {
   visitor->trace(layout_algorithms_);
 }
 }