Change ui cursor identifiers to an enum class.

components/exo/surface.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 COMPONENTS_EXO_SURFACE_H_
 #define COMPONENTS_EXO_SURFACE_H_
 
 #include <list>
 #include <memory>
 #include <set>
@@ skipping 155 matching lines @@
 
   // Returns the current input region of surface in the form of a hit-test mask.
   void GetHitTestMask(gfx::Path* mask) const;
 
   // Surface does not own cursor providers. It is the responsibility of the
   // caller to remove the cursor provider before it is destroyed.
   void RegisterCursorProvider(CursorProvider* provider);
   void UnregisterCursorProvider(CursorProvider* provider);
 
   // Returns the cursor for the surface. If no cursor provider is registered
-  // then kCursorNull is returned.
+  // then CursorType::kNull is returned.
   gfx::NativeCursor GetCursor();
 
   // Set the surface delegate.
   void SetSurfaceDelegate(SurfaceDelegate* delegate);
 
   // Returns true if surface has been assigned a surface delegate.
   bool HasSurfaceDelegate() const;
 
   // Surface does not own observers. It is the responsibility of the observer
   // to remove itself when it is done observing.
@@ skipping 212 matching lines @@
   cc::BeginFrameSource* begin_frame_source_ = nullptr;
   bool needs_begin_frame_ = false;
   cc::BeginFrameAck current_begin_frame_ack_;
 
   DISALLOW_COPY_AND_ASSIGN(Surface);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_SURFACE_H_