Make SelectionState enum class

third_party/WebKit/Source/core/layout/api/SelectionState.h

 // Copyright 2015 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 SelectionState_h
 #define SelectionState_h
 
 #include <iosfwd>
 #include "core/CoreExport.h"
 
 namespace blink {
 
-#define FOR_EACH_SELECTION_STATE(V)                                       \
-  /* The object is not selected. */                                       \
-  V(None)                                                                 \
-  /* The object either contains the start of a selection run or is the */ \
-  /* start of a run. */                                                   \
-  V(Start)                                                                \
-  /* The object is fully encompassed by a selection run. */               \
-  V(Inside)                                                               \
-  /* The object either contains the end of a selection run or is the */   \
-  /* end of a run. */                                                     \
-  V(End)                                                                  \
-  /* The object contains an entire run or is the sole selected object */  \
-  /* in that run. */                                                      \
-  V(Both)
-
-enum SelectionState {
-#define V(state) Selection##state,
-  FOR_EACH_SELECTION_STATE(V)
-#undef V
+enum class SelectionState {
+  /* The object is not selected. */
+  kNone,
+  /* The object either contains the start of a selection run or is the */
+  /* start of a run. */
+  kStart,
+  /* The object is fully encompassed by a selection run. */
+  kInside,
+  /* The object either contains the end of a selection run or is the */
+  /* end of a run. */
+  kEnd,
+  /* The object contains an entire run or is the sole selected object */
+  /* in that run. */
+  kStartAndEnd
 };
 
 CORE_EXPORT std::ostream& operator<<(std::ostream&, const SelectionState);
 
 }  // namespace blink
 
 #endif  // SelectionState_h