Revert 170347 "Convert HTMLFrameOwnerElement and FocusController..."

Source/core/frame/Frame.cpp

Index: Source/core/frame/Frame.cpp
===================================================================
--- Source/core/frame/Frame.cpp	(revision 170478)
+++ Source/core/frame/Frame.cpp	(working copy)
@@ -80,16 +80,10 @@
 #ifndef NDEBUG
     frameCounter.increment();
 #endif
-
-    if (this->ownerElement()) {
-        page()->incrementSubframeCount();
-        this->ownerElement()->setContentFrame(*this);
-    }
 }
 
 Frame::~Frame()
 {
-    disconnectOwnerElement();
     setDOMWindow(nullptr);
 
     // FIXME: We should not be doing all this work inside the destructor
@@ -203,18 +197,4 @@
     return page && this == page->mainFrame();
 }
 
-void Frame::disconnectOwnerElement()
-{
-    // FIXME: The semantics here are specific to LocalFrame and will need to change
-    // when RemoteFrames no longer have Documents.
-    if (ownerElement()) {
-        if (Document* doc = document())
-            doc->topDocument().clearAXObjectCache();
-        ownerElement()->clearContentFrame();
-        if (page())
-            page()->decrementSubframeCount();
-    }
-    m_ownerElement = 0;
-}
-
 } // namespace WebCore