Revert 170347 "Convert HTMLFrameOwnerElement and FocusController..."

Source/core/page/EventHandler.cpp

Index: Source/core/page/EventHandler.cpp
===================================================================
--- Source/core/page/EventHandler.cpp	(revision 170478)
+++ Source/core/page/EventHandler.cpp	(working copy)
@@ -1732,7 +1732,7 @@
 
     if (!m_frame->page())
         return false;
-    Frame* focusFrame = m_frame->page()->focusController().focusedOrMainFrame();
+    LocalFrame* focusFrame = m_frame->page()->focusController().focusedOrMainFrame();
     // Do not paste here if the focus was moved somewhere else.
     if (m_frame == focusFrame && m_frame->editor().behavior().supportsGlobalSelection())
         return m_frame->editor().command("PasteGlobalSelection").execute();
@@ -1765,11 +1765,7 @@
     if (!isHTMLFrameElementBase(target))
         return false;
 
-    // Cross-process drag and drop is not yet supported.
-    if (toHTMLFrameElementBase(target)->contentFrame() && !toHTMLFrameElementBase(target)->contentFrame()->isLocalFrame())
-        return false;
-
-    frame = toLocalFrame(toHTMLFrameElementBase(target)->contentFrame());
+    frame = toHTMLFrameElementBase(target)->contentFrame();
     return true;
 }