EDK: Move ref counting classes to mojo/edk/util.

mojo/edk/util/ref_ptr_internal.h

Index: mojo/edk/util/ref_ptr_internal.h
diff --git a/mojo/edk/system/ref_ptr_internal.h b/mojo/edk/util/ref_ptr_internal.h
similarity index 83%
rename from mojo/edk/system/ref_ptr_internal.h
rename to mojo/edk/util/ref_ptr_internal.h
index 8684694baa8eb4977b92cdb98291197978a9fca0..5c416e9439f650a9bf8e538040315c130c69d355 100644
--- a/mojo/edk/system/ref_ptr_internal.h
+++ b/mojo/edk/util/ref_ptr_internal.h
@@ -2,15 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MOJO_EDK_SYSTEM_REF_PTR_INTERNAL_H_
-#define MOJO_EDK_SYSTEM_REF_PTR_INTERNAL_H_
+#ifndef MOJO_EDK_UTIL_REF_PTR_INTERNAL_H_
+#define MOJO_EDK_UTIL_REF_PTR_INTERNAL_H_
 
 #include <utility>
 
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
-namespace system {
+namespace util {
 
 template <typename T>
 class RefPtr;
@@ -34,7 +34,7 @@ class MakeRefCountedHelper {
 };
 
 }  // namespace internal
-}  // namespace system
+}  // namespace util
 }  // namespace mojo
 
-#endif  // MOJO_EDK_SYSTEM_REF_PTR_INTERNAL_H_
+#endif  // MOJO_EDK_UTIL_REF_PTR_INTERNAL_H_