Convert HTMLFrameOwnerElement and FocusController to use Frame.

Source/core/html/HTMLFrameElementBase.cpp

Index: Source/core/html/HTMLFrameElementBase.cpp
diff --git a/Source/core/html/HTMLFrameElementBase.cpp b/Source/core/html/HTMLFrameElementBase.cpp
index 23eb76f2cac6defe6ab24832b007a9e29afbc4eb..308ec43cdc97cff855dd3cc89b034f8160c60f33 100644
--- a/Source/core/html/HTMLFrameElementBase.cpp
+++ b/Source/core/html/HTMLFrameElementBase.cpp
@@ -94,7 +94,7 @@ void HTMLFrameElementBase::openURL(bool lockBackForwardList)
         return;
     if (!contentFrame() || scriptURL.isEmpty())
         return;
-    contentFrame()->script().executeScriptIfJavaScriptURL(scriptURL);
+    toLocalFrame(contentFrame())->script().executeScriptIfJavaScriptURL(scriptURL);
 }
 
 void HTMLFrameElementBase::parseAttribute(const QualifiedName& name, const AtomicString& value)
@@ -164,8 +164,10 @@ void HTMLFrameElementBase::attach(const AttachContext& context)
     HTMLFrameOwnerElement::attach(context);
 
     if (RenderPart* part = renderPart()) {
-        if (LocalFrame* frame = contentFrame())
-            part->setWidget(frame->view());
+        if (Frame* frame = contentFrame()) {
+            if (frame->isLocalFrame())
+                part->setWidget(toLocalFrame(frame)->view());
+        }
     }
 }