Move GetCursor() method from WindowDelegate to its own delegate interface CursorDelegate.

ui/aura/window.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/aura/window.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 605 matching lines @@
 }
 
 void Window::MoveCursorTo(const gfx::Point& point_in_window) {
   Window* root_window = GetRootWindow();
   DCHECK(root_window);
   gfx::Point point_in_root(point_in_window);
   ConvertPointToTarget(this, root_window, &point_in_root);
   root_window->GetHost()->MoveCursorTo(point_in_root);
 }
 
-gfx::NativeCursor Window::GetCursor(const gfx::Point& point) const {
-  return delegate_ ? delegate_->GetCursor(point) : gfx::kNullCursor;
-}
-
 void Window::SetEventFilter(ui::EventHandler* event_filter) {
   if (event_filter_)
     RemovePreTargetHandler(event_filter_.get());
   event_filter_.reset(event_filter);
   if (event_filter)
     AddPreTargetHandler(event_filter);
 }
 
 void Window::AddObserver(WindowObserver* observer) {
   observers_.AddObserver(observer);
@@ skipping 786 matching lines @@
       return window;
     if (offset)
       *offset += window->bounds().OffsetFromOrigin();
   }
   if (offset)
     *offset = gfx::Vector2d();
   return NULL;
 }
 
 }  // namespace aura