Use tighter typing in editing: CompositeEditCommand

Source/core/editing/ApplyBlockElementCommand.cpp

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google 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
@@ skipping 16 matching lines @@
 #include "config.h"
 #include "core/editing/ApplyBlockElementCommand.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/HTMLNames.h"
 #include "core/dom/NodeRenderStyle.h"
 #include "core/dom/Text.h"
 #include "core/editing/VisiblePosition.h"
 #include "core/editing/VisibleUnits.h"
 #include "core/editing/htmlediting.h"
+#include "core/html/HTMLBRElement.h"
 #include "core/html/HTMLElement.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/style/RenderStyle.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 ApplyBlockElementCommand::ApplyBlockElementCommand(Document& document, const QualifiedName& tagName, const AtomicString& inlineStyle)
     : CompositeEditCommand(document)
@@ skipping 59 matching lines @@
 }
 
 void ApplyBlockElementCommand::formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection)
 {
     // Special case empty unsplittable elements because there's nothing to split
     // and there's nothing to move.
     Position start = startOfSelection.deepEquivalent().downstream();
     if (isAtUnsplittableElement(start)) {
         RefPtrWillBeRawPtr<HTMLElement> blockquote = createBlockElement();
         insertNodeAt(blockquote, start);
-        RefPtrWillBeRawPtr<Element> placeholder = createBreakElement(document());
+        RefPtrWillBeRawPtr<HTMLBRElement> placeholder = createBreakElement(document());
         appendNode(placeholder, blockquote);
         setEndingSelection(VisibleSelection(positionBeforeNode(placeholder.get()), DOWNSTREAM, endingSelection().isDirectional()));
         return;
     }
 
     RefPtrWillBeRawPtr<HTMLElement> blockquoteForNextIndent = nullptr;
     VisiblePosition endOfCurrentParagraph = endOfParagraph(startOfSelection);
     VisiblePosition endOfLastParagraph = endOfParagraph(endOfSelection);
     VisiblePosition endAfterSelection = endOfParagraph(endOfLastParagraph.next());
     m_endOfLastParagraph = endOfLastParagraph.deepEquivalent();
@@ skipping 161 matching lines @@
     return element.release();
 }
 
 void ApplyBlockElementCommand::trace(Visitor* visitor)
 {
     visitor->trace(m_endOfLastParagraph);
     CompositeEditCommand::trace(visitor);
 }
 
 }