Cast highestEnclosingNodeOfType() return value to tighter type

Source/core/editing/CompositeEditCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2007, 2008 Apple 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 48 matching lines @@
 #include "core/editing/TextIterator.h"
 #include "core/editing/VisibleUnits.h"
 #include "core/editing/WrapContentsInDummySpanCommand.h"
 #include "core/editing/htmlediting.h"
 #include "core/editing/markup.h"
 #include "core/events/ScopedEventQueue.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLBRElement.h"
 #include "core/html/HTMLDivElement.h"
 #include "core/html/HTMLElement.h"
+#include "core/html/HTMLQuoteElement.h"
 #include "core/html/HTMLSpanElement.h"
 #include "core/rendering/InlineTextBox.h"
 #include "core/rendering/RenderBlock.h"
 #include "core/rendering/RenderListItem.h"
 #include "core/rendering/RenderText.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
@@ skipping 1274 matching lines @@
 }
 
 // If the caret is in an empty quoted paragraph, and either there is nothing before that
 // paragraph, or what is before is unquoted, and the user presses delete, unquote that paragraph.
 bool CompositeEditCommand::breakOutOfEmptyMailBlockquotedParagraph()
 {
     if (!endingSelection().isCaret())
         return false;
 
     VisiblePosition caret(endingSelection().visibleStart());
-    Node* highestBlockquote = highestEnclosingNodeOfType(caret.deepEquivalent(), &isMailBlockquote);
+    HTMLQuoteElement* highestBlockquote = toHTMLQuoteElement(highestEnclosingNodeOfType(caret.deepEquivalent(), &isMailHTMLBlockquoteElement));
     if (!highestBlockquote)
         return false;
 
     if (!isStartOfParagraph(caret) || !isEndOfParagraph(caret))
         return false;
 
     VisiblePosition previous(caret.previous(CannotCrossEditingBoundary));
     // Only move forward if there's nothing before the caret, or if there's unquoted content before it.
-    if (enclosingNodeOfType(previous.deepEquivalent(), &isMailBlockquote))
+    if (enclosingNodeOfType(previous.deepEquivalent(), &isMailHTMLBlockquoteElement))
         return false;
 
     RefPtrWillBeRawPtr<HTMLBRElement> br = createBreakElement(document());
     // We want to replace this quoted paragraph with an unquoted one, so insert a br
     // to hold the caret before the highest blockquote.
     insertNodeBefore(br, highestBlockquote);
     VisiblePosition atBR(positionBeforeNode(br.get()));
     // If the br we inserted collapsed, for example foo<br><blockquote>...</blockquote>, insert
     // a second one.
     if (!isStartOfParagraph(atBR))
@@ skipping 114 matching lines @@
 }
 
 void CompositeEditCommand::trace(Visitor* visitor)
 {
     visitor->trace(m_commands);
     visitor->trace(m_composition);
     EditCommand::trace(visitor);
 }
 
 } // namespace blink