Remove iframe@seamless

Source/core/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 1381 matching lines @@
         return false;
     if (!ownerElement->hasTagName(iframeTag))
         return false;
     return ownerElement->fastHasAttribute(srcdocAttr);
 }
 
 Frame* FrameLoader::findFrameForNavigation(const AtomicString& name, Document* activeDocument)
 {
     ASSERT(activeDocument);
     Frame* frame = m_frame->tree().find(name);
-
-    // From http://www.whatwg.org/specs/web-apps/current-work/#seamlessLinks:
-    //
-    // If the source browsing context is the same as the browsing context
-    // being navigated, and this browsing context has its seamless browsing
-    // context flag set, and the browsing context being navigated was not
-    // chosen using an explicit self-navigation override, then find the
-    // nearest ancestor browsing context that does not have its seamless
-    // browsing context flag set, and continue these steps as if that
-    // browsing context was the one that was going to be navigated instead.
-    if (frame == m_frame && name != "_self" && m_frame->document()->shouldDisplaySeamlesslyWithParent()) {
-        for (Frame* ancestor = m_frame; ancestor; ancestor = ancestor->tree().parent()) {
-            if (!ancestor->document()->shouldDisplaySeamlesslyWithParent()) {
-                frame = ancestor;
-                break;
-            }
-        }
-        ASSERT(frame != m_frame);
-    }
-
     if (!activeDocument->canNavigate(frame))
         return 0;
     return frame;
 }
 
 void FrameLoader::loadHistoryItem(HistoryItem* item, HistoryLoadType historyLoadType, ResourceRequestCachePolicy cachePolicy)
 {
     m_provisionalItem = item;
     if (historyLoadType == HistorySameDocumentLoad) {
         loadInSameDocument(item->url(), item->stateObject(), DoNotUpdateBackForwardList, NotClientRedirect);
@@ skipping 49 matching lines @@
 {
     SandboxFlags flags = m_forcedSandboxFlags;
     if (Frame* parentFrame = m_frame->tree().parent())
         flags |= parentFrame->document()->sandboxFlags();
     if (HTMLFrameOwnerElement* ownerElement = m_frame->ownerElement())
         flags |= ownerElement->sandboxFlags();
     return flags;
 }
 
 } // namespace WebCore