Change Page::m_mainFrame to be a Frame.

Source/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * 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.
@@ skipping 830 matching lines @@
     return autoscrollController() && autoscrollController()->panScrollInProgress();
 }
 
 HitTestResult EventHandler::hitTestResultAtPoint(const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType, const LayoutSize& padding)
 {
     TRACE_EVENT0("webkit", "EventHandler::hitTestResultAtPoint");
 
     // We always send hitTestResultAtPoint to the main frame if we have one,
     // otherwise we might hit areas that are obscured by higher frames.
     if (Page* page = m_frame->page()) {
-        LocalFrame* mainFrame = page->mainFrame();
-        if (m_frame != mainFrame) {
+        LocalFrame* mainFrame = page->mainFrame()->isLocalFrame() ? page->deprecatedLocalMainFrame() : 0;
+        if (mainFrame && m_frame != mainFrame) {
             FrameView* frameView = m_frame->view();
             FrameView* mainView = mainFrame->view();
             if (frameView && mainView) {
                 IntPoint mainFramePoint = mainView->rootViewToContents(frameView->contentsToRootView(roundedIntPoint(point)));
                 return mainFrame->eventHandler().hitTestResultAtPoint(mainFramePoint, hitType, padding);
             }
         }
     }
 
     HitTestResult result(point, padding.height(), padding.width(), padding.height(), padding.width());
@@ skipping 2382 matching lines @@
 {
     ASSERT(event->type() == EventTypeNames::keydown);
 
     if (event->ctrlKey() || event->metaKey() || event->altKey() || event->altGraphKey())
         return;
 
     if (!m_frame->editor().behavior().shouldNavigateBackOnBackspace())
         return;
 
     Page* page = m_frame->page();
-    if (!page)
+    if (!page || !page->mainFrame()->isLocalFrame())
         return;
-    bool handledEvent = page->mainFrame()->loader().client()->navigateBackForward(event->shiftKey() ? 1 : -1);
+    bool handledEvent = page->deprecatedLocalMainFrame()->loader().client()->navigateBackForward(event->shiftKey() ? 1 : -1);
     if (handledEvent)
         event->setDefaultHandled();
 }
 
 void EventHandler::defaultArrowEventHandler(FocusType focusType, KeyboardEvent* event)
 {
     ASSERT(event->type() == EventTypeNames::keydown);
 
     if (event->ctrlKey() || event->metaKey() || event->altGraphKey() || event->shiftKey())
         return;
@@ skipping 496 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace WebCore