Make start/stop loading notifications per-frame

Source/core/accessibility/AXRenderObject.cpp

 /*
 * Copyright (C) 2008 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 1475 matching lines @@
 //
 
 double AXRenderObject::estimatedLoadingProgress() const
 {
     if (!m_renderer)
         return 0;
 
     if (isLoaded())
         return 1.0;
 
-    if (Page* page = m_renderer->document().page())
-        return page->progress().estimatedProgress();
+    if (LocalFrame* frame = m_renderer->document().frame())
+        return frame->loader().progress().estimatedProgress();
     return 0;
 }
 
 //
 // DOM and Render tree access.
 //
 
 Node* AXRenderObject::node() const
 {
     return m_renderer ? m_renderer->node() : 0;
@@ skipping 834 matching lines @@
         if (label && label->renderer()) {
             LayoutRect labelRect = axObjectCache()->getOrCreate(label)->elementRect();
             result.unite(labelRect);
         }
     }
 
     return result;
 }
 
 } // namespace WebCore