Revert 170347 "Convert HTMLFrameOwnerElement and FocusController..."

Source/web/SpellCheckerClientImpl.cpp

Index: Source/web/SpellCheckerClientImpl.cpp
===================================================================
--- Source/web/SpellCheckerClientImpl.cpp	(revision 170478)
+++ Source/web/SpellCheckerClientImpl.cpp	(working copy)
@@ -56,9 +56,7 @@
 {
     // Spellcheck should be enabled for all editable areas (such as textareas,
     // contentEditable regions, designMode docs and inputs).
-    if (!m_webView->focusedWebCoreFrame()->isLocalFrame())
-        return false;
-    const LocalFrame* frame = toLocalFrame(m_webView->focusedWebCoreFrame());
+    const LocalFrame* frame = m_webView->focusedWebCoreFrame();
     if (!frame)
         return false;
     if (frame->spellChecker().isSpellCheckingEnabledInFocusedNode())
@@ -102,13 +100,11 @@
         }
     } else {
         m_spellCheckThisFieldStatus = SpellCheckForcedOn;
-        if (m_webView->focusedWebCoreFrame()->isLocalFrame()) {
-            if (LocalFrame* frame = toLocalFrame(m_webView->focusedWebCoreFrame())) {
-                VisibleSelection frameSelection = frame->selection().selection();
-                // If a selection is in an editable element spell check its content.
-                if (Element* rootEditableElement = frameSelection.rootEditableElement()) {
-                    frame->spellChecker().didBeginEditing(rootEditableElement);
-                }
+        if (LocalFrame* frame = m_webView->focusedWebCoreFrame()) {
+            VisibleSelection frameSelection = frame->selection().selection();
+            // If a selection is in an editable element spell check its content.
+            if (Element* rootEditableElement = frameSelection.rootEditableElement()) {
+                frame->spellChecker().didBeginEditing(rootEditableElement);
             }
         }
     }
@@ -116,13 +112,13 @@
 
 bool SpellCheckerClientImpl::isGrammarCheckingEnabled()
 {
-    const LocalFrame* frame = toLocalFrame(m_webView->focusedWebCoreFrame());
+    const LocalFrame* frame = m_webView->focusedWebCoreFrame();
     return frame && frame->settings() && (frame->settings()->asynchronousSpellCheckingEnabled() || frame->settings()->unifiedTextCheckerEnabled());
 }
 
 bool SpellCheckerClientImpl::shouldEraseMarkersAfterChangeSelection(TextCheckingType type) const
 {
-    const Frame* frame = m_webView->focusedWebCoreFrame();
+    const LocalFrame* frame = m_webView->focusedWebCoreFrame();
     return !frame || !frame->settings() || (!frame->settings()->asynchronousSpellCheckingEnabled() && !frame->settings()->unifiedTextCheckerEnabled());
 }