Convert HTMLFrameOwnerElement and FocusController to use Frame.

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index ff699d8b21e0cb702e42b06a18cc5bcce3318583..f8efac01d427436c761537e5600d2864ed719d41 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -995,7 +995,7 @@ PassRefPtr<Node> Document::adoptNode(PassRefPtr<Node> source, ExceptionState& ex
 
         if (source->isFrameOwnerElement()) {
             HTMLFrameOwnerElement* frameOwnerElement = toHTMLFrameOwnerElement(source.get());
-            if (frame() && frame()->tree().isDescendantOf(frameOwnerElement->contentFrame())) {
+            if (frame() && frame()->tree().isDescendantOf(toLocalFrame(frameOwnerElement->contentFrame()))) {
                 exceptionState.throwDOMException(HierarchyRequestError, "The node provided is a frame which contains this document.");
                 return nullptr;
             }
@@ -5450,7 +5450,7 @@ bool Document::hasFocus() const
         return false;
     if (!page->focusController().isActive() || !page->focusController().isFocused())
         return false;
-    if (LocalFrame* focusedFrame = page->focusController().focusedFrame()) {
+    if (LocalFrame* focusedFrame = toLocalFrame(page->focusController().focusedFrame())) {
         if (focusedFrame->tree().isDescendantOf(frame()))
             return true;
     }