Use tighter typing in editing: CompositeEditCommand

Source/core/editing/ApplyStyleCommand.cpp

Index: Source/core/editing/ApplyStyleCommand.cpp
diff --git a/Source/core/editing/ApplyStyleCommand.cpp b/Source/core/editing/ApplyStyleCommand.cpp
index 472165b28fce5dfaa95e8bb46bb6e3dace57dd80..a776b09a4cab0cbdeab0caae212435f6fbc85b38 100644
--- a/Source/core/editing/ApplyStyleCommand.cpp
+++ b/Source/core/editing/ApplyStyleCommand.cpp
@@ -273,7 +273,7 @@ void ApplyStyleCommand::applyBlockStyle(EditingStyle *style)
             RefPtrWillBeRawPtr<Element> block = enclosingBlock(paragraphStart.deepEquivalent().deprecatedNode());
             const Position& paragraphStartToMove = paragraphStart.deepEquivalent();
             if (!m_removeOnly && isEditablePosition(paragraphStartToMove)) {
-                RefPtrWillBeRawPtr<Element> newBlock = moveParagraphContentsToNewBlockIfNecessary(paragraphStartToMove);
+                RefPtrWillBeRawPtr<HTMLElement> newBlock = moveParagraphContentsToNewBlockIfNecessary(paragraphStartToMove);
                 if (newBlock)
                     block = newBlock;
             }