Use tighter typing in editing/

Source/core/editing/IndentOutdentCommand.cpp

Index: Source/core/editing/IndentOutdentCommand.cpp
diff --git a/Source/core/editing/IndentOutdentCommand.cpp b/Source/core/editing/IndentOutdentCommand.cpp
index 5515de76d76c1f728ef49e51f7d21625f1b55652..434231f339690f3131ec4678f8a852cfc6873098 100644
--- a/Source/core/editing/IndentOutdentCommand.cpp
+++ b/Source/core/editing/IndentOutdentCommand.cpp
@@ -93,7 +93,7 @@ bool IndentOutdentCommand::tryIndentingAsListItem(const Position& start, const P
     return true;
 }
 
-void IndentOutdentCommand::indentIntoBlockquote(const Position& start, const Position& end, RefPtrWillBeRawPtr<Element>& targetBlockquote)
+void IndentOutdentCommand::indentIntoBlockquote(const Position& start, const Position& end, RefPtrWillBeRawPtr<HTMLElement>& targetBlockquote)
 {
     Node* enclosingCell = enclosingNodeOfType(start, &isTableCell);
     Node* nodeToSplitTo;
@@ -243,7 +243,7 @@ void IndentOutdentCommand::formatSelection(const VisiblePosition& startOfSelecti
         outdentRegion(startOfSelection, endOfSelection);
 }
 
-void IndentOutdentCommand::formatRange(const Position& start, const Position& end, const Position&, RefPtrWillBeRawPtr<Element>& blockquoteForNextIndent)
+void IndentOutdentCommand::formatRange(const Position& start, const Position& end, const Position&, RefPtrWillBeRawPtr<HTMLElement>& blockquoteForNextIndent)
 {
     if (tryIndentingAsListItem(start, end))
         blockquoteForNextIndent = nullptr;