Make core/editing/ files to match Blink coding style

Source/core/editing/ApplyStyleCommand.h

Index: Source/core/editing/ApplyStyleCommand.h
diff --git a/Source/core/editing/ApplyStyleCommand.h b/Source/core/editing/ApplyStyleCommand.h
index 9f5ac248db46c1190a7f5d2d3e179a28b6715aed..e3b4fe5bb7b84253bd936cfb74d13d3aea123767 100644
--- a/Source/core/editing/ApplyStyleCommand.h
+++ b/Source/core/editing/ApplyStyleCommand.h
@@ -106,7 +106,7 @@ private:
     void splitTextElementAtStart(const Position& start, const Position& end);
     void splitTextElementAtEnd(const Position& start, const Position& end);
     bool shouldSplitTextElement(Element*, EditingStyle*);
-    bool isValidCaretPositionInTextNode(const Position& position);
+    bool isValidCaretPositionInTextNode(const Position&);
     bool mergeStartWithPreviousIfIdentical(const Position& start, const Position& end);
     bool mergeEndWithNextIfIdentical(const Position& start, const Position& end);
     void cleanupUnstyledAppleStyleSpans(ContainerNode* dummySpanAncestor);