Move ash specific cursor code to CursorManager.

ui/base/cursor/cursor.h

Index: ui/base/cursor/cursor.h
diff --git a/ui/base/cursor/cursor.h b/ui/base/cursor/cursor.h
index 2383274f95f25c2bf154178ac8022bd6f9c8623a..43c201db37bc105cf8956efc6e05d10c35155bf3 100644
--- a/ui/base/cursor/cursor.h
+++ b/ui/base/cursor/cursor.h
@@ -102,16 +102,24 @@ class UI_EXPORT Cursor {
 
   int native_type() const { return native_type_; }
   PlatformCursor platform() const { return platform_cursor_; }
+  float device_scale_factor() const {
+    return device_scale_factor_;
+  }
+  void set_device_scale_factor(float device_scale_factor) {
+    device_scale_factor_ = device_scale_factor;
+  }
 
   bool operator==(int type) const { return native_type_ == type; }
   bool operator==(const Cursor& cursor) const {
     return native_type_ == cursor.native_type_ &&
-           platform_cursor_ == cursor.platform_cursor_;
+           platform_cursor_ == cursor.platform_cursor_ &&
+           device_scale_factor_ == cursor.device_scale_factor_;
   }
   bool operator!=(int type) const { return native_type_ != type; }
   bool operator!=(const Cursor& cursor) const {
     return native_type_ != cursor.native_type_ ||
-           platform_cursor_ != cursor.platform_cursor_;
+           platform_cursor_ != cursor.platform_cursor_ ||
+           device_scale_factor_ != cursor.device_scale_factor_;
   }
 
   void operator=(const Cursor& cursor) {
@@ -125,6 +133,9 @@ class UI_EXPORT Cursor {
   int native_type_;
 
   PlatformCursor platform_cursor_;
+
+  // The device scale factor for the cursor.
+  float device_scale_factor_;
 };
 
 }  // namespace ui