Move dispatchUnloadEvent to WebFrame, part 1/3.

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2385 matching lines @@
     // Only change override encoding, don't change default encoding.
     // Note that the new encoding must be 0 if it isn't supposed to be set.
     AtomicString newEncodingName;
     if (!encodingName.isEmpty())
         newEncodingName = encodingName;
     m_page->mainFrame()->loader().reload(NormalReload, KURL(), newEncodingName);
 }
 
 void WebViewImpl::dispatchUnloadEvent()
 {
+    WebFrame* frame = mainFrame();
+    if (!frame)
+        return;
+
     // Run unload handlers.
-    m_page->mainFrame()->loader().closeURL();
+    frame->dispatchUnloadEvent();
 }
 
 WebFrame* WebViewImpl::mainFrame()
 {
     return mainFrameImpl();
 }
 
 WebFrame* WebViewImpl::findFrameByName(
     const WebString& name, WebFrame* relativeToFrame)
 {
@@ skipping 1557 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace blink