Change ui cursor identifiers to an enum class.

ui/base/cursor/cursor_data.cc

 // Copyright 2017 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 "ui/base/cursor/cursor_data.h"
 
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/cursor/cursor.h"
 
 namespace ui {
 
-CursorData::CursorData() : cursor_type_(0), scale_factor_(0.0f) {}
+CursorData::CursorData()
+    : cursor_type_(CursorType::kNull), scale_factor_(0.0f) {}
 
-CursorData::CursorData(int type) : cursor_type_(type), scale_factor_(0.0f) {}
+CursorData::CursorData(CursorType type)
+    : cursor_type_(type), scale_factor_(0.0f) {}
 
 CursorData::CursorData(const gfx::Point& hotspot_point,
                        const std::vector<SkBitmap>& cursor_frames,
                        float scale_factor,
                        const base::TimeDelta& frame_delay)
-    : cursor_type_(kCursorCustom),
+    : cursor_type_(CursorType::kCustom),
       frame_delay_(frame_delay),
       scale_factor_(scale_factor),
       hotspot_(hotspot_point),
       cursor_frames_(cursor_frames) {
   for (SkBitmap& bitmap : cursor_frames_)
     generator_ids_.push_back(bitmap.getGenerationID());
 }
 
 CursorData::CursorData(const CursorData& cursor) = default;
 
 CursorData::~CursorData() {}
 
 CursorData& CursorData::operator=(const CursorData& cursor) = default;
 
-bool CursorData::IsType(int cursor_type) const {
+bool CursorData::IsType(CursorType cursor_type) const {
   return cursor_type_ == cursor_type;
 }
 
 bool CursorData::IsSameAs(const CursorData& rhs) const {
   return cursor_type_ == rhs.cursor_type_ && frame_delay_ == rhs.frame_delay_ &&
          hotspot_ == rhs.hotspot_ && scale_factor_ == rhs.scale_factor_ &&
          generator_ids_ == rhs.generator_ids_;
 }
 
 }  // namespace ui