Fix Aura can't provide accurate cursor hotspot info.

ui/base/cursor/cursor_loader_x11.cc

 // 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.
 
 #include "ui/base/cursor/cursor_loader_x11.h"
 
 #include <float.h>
 #include <X11/cursorfont.h>
 #include <X11/Xlib.h>
 
@@ skipping 266 matching lines @@
   DCHECK(cursor);
 
   if (*cursor == kCursorNone) {
     cursor->SetPlatformCursor(invisible_cursor_.get());
     return;
   }
 
   if (*cursor == kCursorCustom)
     return;
 
+  cursor->set_device_scale_factor(scale());
   cursor->SetPlatformCursor(CursorFromId(cursor->native_type()));
 }
 
 const XcursorImage* CursorLoaderX11::GetXcursorImageForTest(int id) {
   return test::GetCachedXcursorImage(image_cursors_[id]->cursor);
 }
 
 bool CursorLoaderX11::IsImageCursor(gfx::NativeCursor native_cursor) {
   int type = native_cursor.native_type();
   return image_cursors_.count(type) || animated_cursors_.count(type);
@@ skipping 44 matching lines @@
   }
 
   // As a last resort, return a left pointer.
   cursor = XCreateFontCursor(display_, XC_left_ptr);
   DCHECK(cursor);
   font_cursors_[id] = cursor;
   return cursor;
 }
 
 }  // namespace ui