Cast highestEnclosingNodeOfType() return value to tighter type

Source/core/editing/InsertParagraphSeparatorCommand.cpp

 /*
  * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 18 matching lines @@
 #include "core/HTMLNames.h"
 #include "core/dom/Document.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/Text.h"
 #include "core/editing/EditingStyle.h"
 #include "core/editing/InsertLineBreakCommand.h"
 #include "core/editing/VisibleUnits.h"
 #include "core/editing/htmlediting.h"
 #include "core/html/HTMLBRElement.h"
 #include "core/html/HTMLElement.h"
+#include "core/html/HTMLQuoteElement.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderText.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 // When inserting a new line, we want to avoid nesting empty divs if we can.  Otherwise, when
 // pasting, it's easy to have each new line be a div deeper than the previous.  E.g., in the case
 // below, we want to insert at ^ instead of |.
@@ skipping 174 matching lines @@
                 // represent the paragraph that we're leaving.
                 RefPtrWillBeRawPtr<Element> extraBlock = createDefaultParagraphElement(document());
                 appendNode(extraBlock, startBlock);
                 appendBlockPlaceholder(extraBlock);
             }
             appendNode(blockToInsert, startBlock);
         } else {
             // We can get here if we pasted a copied portion of a blockquote with a newline at the end and are trying to paste it
             // into an unquoted area. We then don't want the newline within the blockquote or else it will also be quoted.
             if (m_pasteBlockqutoeIntoUnquotedArea) {
-                if (Node* highestBlockquote = highestEnclosingNodeOfType(canonicalPos, &isMailBlockquote))
-                    startBlock = toElement(highestBlockquote);
+                if (HTMLQuoteElement* highestBlockquote = toHTMLQuoteElement(highestEnclosingNodeOfType(canonicalPos, &isMailHTMLBlockquoteElement)))
+                    startBlock = highestBlockquote;
             }
 
             if (listChild && listChild != startBlock) {
                 RefPtrWillBeRawPtr<Element> listChildToInsert = listChild->cloneElementWithoutChildren();
                 appendNode(blockToInsert, listChildToInsert.get());
                 insertNodeAfter(listChildToInsert.get(), listChild);
             } else {
                 // Most of the time we want to stay at the nesting level of the startBlock (e.g., when nesting within lists). However,
                 // for div nodes, this can result in nested div tags that are hard to break out of.
                 Element* siblingNode = startBlock.get();
@@ skipping 183 matching lines @@
 }
 
 void InsertParagraphSeparatorCommand::trace(Visitor *visitor)
 {
     visitor->trace(m_style);
     CompositeEditCommand::trace(visitor);
 }
 
 
 } // namespace blink