Change ui cursor identifiers to an enum class.

ui/base/cursor/cursor_loader.h

 // Copyright (c) 2012 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 UI_BASE_CURSOR_CURSOR_LOADER_H_
 #define UI_BASE_CURSOR_CURSOR_LOADER_H_
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
@@ skipping 19 matching lines @@
   float scale() const {
     return scale_;
   }
 
   // Sets the scale of the mouse cursor icon.
   void set_scale(const float scale) {
     scale_ = scale;
   }
 
   // Creates a cursor from an image resource and puts it in the cursor map.
-  virtual void LoadImageCursor(int id,
+  virtual void LoadImageCursor(CursorType id,
                                int resource_id,
                                const gfx::Point& hot) = 0;
 
   // Creates an animated cursor from an image resource and puts it in the
   // cursor map. The image is assumed to be a concatenation of animation frames
   // from left to right. Also, each frame is assumed to be square
   // (width == height).
   // |frame_delay_ms| is the delay between frames in millisecond.
-  virtual void LoadAnimatedCursor(int id,
+  virtual void LoadAnimatedCursor(CursorType id,
                                   int resource_id,
                                   const gfx::Point& hot,
                                   int frame_delay_ms) = 0;
 
   // Unloads all the cursors.
   virtual void UnloadAll() = 0;
 
   // Sets the platform cursor based on the native type of |cursor|.
   virtual void SetPlatformCursor(gfx::NativeCursor* cursor) = 0;
 
   // Creates a CursorLoader.
   static CursorLoader* Create();
 
  private:
   // The current scale of the mouse cursor icon.
   float scale_;
 
   // The current rotation of the mouse cursor icon.
   display::Display::Rotation rotation_;
 
   DISALLOW_COPY_AND_ASSIGN(CursorLoader);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CURSOR_CURSOR_LOADER_H_