Schedule cursor update on URL cursor image loaded

third_party/WebKit/Source/core/layout/LayoutFrame.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #include "core/layout/LayoutFrame.h"
 
 #include "core/frame/FrameView.h"
+#include "core/frame/LocalFrame.h"
 #include "core/html/HTMLFrameElement.h"
+#include "core/input/EventHandler.h"
+#include "core/style/CursorData.h"
 
 namespace blink {
 
 LayoutFrame::LayoutFrame(HTMLFrameElement* frame)
     : LayoutPart(frame)
 {
     setInline(false);
 }
 
 FrameEdgeInfo LayoutFrame::edgeInfo() const
 {
     HTMLFrameElement* element = toHTMLFrameElement(node());
     return FrameEdgeInfo(element->noResize(), element->hasFrameBorder());
 }
 
+void LayoutFrame::imageChanged(WrappedImagePtr image, const IntRect*)
+{
+    if (const CursorList* cursors = style()->cursors()) {
+        for (const CursorData& cursor : *cursors) {
+            if (cursor.image() && cursor.image()->cachedImage() == image) {
+                if (LocalFrame* frame = this->frame()) {
+                    // Cursor update scheduling is done by the local root, which is the main frame if there
+                    // are no RemoteFrame ancestors in the frame tree. Use of localFrameRoot() is
+                    // discouraged but will change when cursor update scheduling is moved from EventHandler
+                    // to PageEventHandler.
+                    frame->localFrameRoot()->eventHandler().scheduleCursorUpdate();
+                }
+            }
+        }
+    }
+}
+
 void LayoutFrame::updateFromElement()
 {
     if (parent() && parent()->isFrameSet())
         toLayoutFrameSet(parent())->notifyFrameEdgeInfoChanged();
 }
 
 } // namespace blink