(Mac) Intercept (Cocoa) cursor setting by plugins and forward it on properly....

webkit/glue/plugins/webplugin_delegate_impl_mac.mm

 // Copyright (c) 2006-2008 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "webkit/glue/plugins/webplugin_delegate_impl.h"
 
 #include <string>
 #include <unistd.h>
@@ skipping 422 matching lines @@
   if (focus_notifier_)
     focus_notifier_(this);
   else
     FocusNotify(this);
 }
 
 void WebPluginDelegateImpl::SetThemeCursor(ThemeCursor cursor) {
   current_windowless_cursor_.InitFromThemeCursor(cursor);
 }
 
+void WebPluginDelegateImpl::SetNSCursor(NSCursor* cursor) {
+  current_windowless_cursor_.InitFromNSCursor(cursor);
+}
+
 void WebPluginDelegateImpl::UpdatePluginLocation(const WebMouseEvent& event) {
   instance()->set_plugin_origin(gfx::Point(event.globalX - event.x,
                                            event.globalY - event.y));
 
 #ifndef NP_NO_CARBON
   if (instance()->event_model() == NPEventModelCarbon) {
     last_window_x_offset_ = event.globalX - event.windowX;
     last_window_y_offset_ = event.globalY - event.windowY;
     last_mouse_x_ = event.globalX;
     last_mouse_y_ = event.globalY;
@@ skipping 420 matching lines @@
 
 #ifndef NP_NO_CARBON
   if (instance()->event_model() == NPEventModelCarbon) {
     MessageLoop::current()->PostDelayedTask(FROM_HERE,
         null_event_factory_.NewRunnableMethod(
             &WebPluginDelegateImpl::OnNullEvent),
         kPluginIdleThrottleDelayMs);
   }
 #endif
 }