Move execCommand related files in core/editing/ related files into core/editing/commands/

Source/core/editing/commands/SmartReplaceCF.cpp

Index: Source/core/editing/commands/SmartReplaceCF.cpp
diff --git a/Source/core/editing/SmartReplaceCF.cpp b/Source/core/editing/commands/SmartReplaceCF.cpp
similarity index 95%
rename from Source/core/editing/SmartReplaceCF.cpp
rename to Source/core/editing/commands/SmartReplaceCF.cpp
index 47aa7870a71316b55d27bb341cbd9078b40c6bd1..32e04e3f797fb9be82fb42fb8cdd903d5c438909 100644
--- a/Source/core/editing/SmartReplaceCF.cpp
+++ b/Source/core/editing/commands/SmartReplaceCF.cpp
@@ -27,7 +27,7 @@
  */
 
 #include "config.h"
-#include "core/editing/SmartReplace.h"
+#include "core/editing/commands/SmartReplace.h"
 
 #include <CoreFoundation/CFCharacterSet.h>
 #include <CoreFoundation/CFString.h>
@@ -36,8 +36,8 @@ namespace blink {
 
 static CFMutableCharacterSetRef getSmartSet(bool isPreviousCharacter)
 {
-    static CFMutableCharacterSetRef preSmartSet = NULL;
-    static CFMutableCharacterSetRef postSmartSet = NULL;
+    static CFMutableCharacterSetRef preSmartSet = nullptr;
+    static CFMutableCharacterSetRef postSmartSet = nullptr;
     CFMutableCharacterSetRef smartSet = isPreviousCharacter ? preSmartSet : postSmartSet;
     if (!smartSet) {
         smartSet = CFCharacterSetCreateMutable(kCFAllocatorDefault);