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

mojo/edk/util/ref_counted_internal.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Internal implementation details for ref_counted.h.
 
-#ifndef MOJO_EDK_SYSTEM_REF_COUNTED_INTERNAL_H_
-#define MOJO_EDK_SYSTEM_REF_COUNTED_INTERNAL_H_
+#ifndef MOJO_EDK_UTIL_REF_COUNTED_INTERNAL_H_
+#define MOJO_EDK_UTIL_REF_COUNTED_INTERNAL_H_
 
 #include <assert.h>
 
 #include <atomic>
 
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
-namespace system {
+namespace util {
 namespace internal {
 
 class RefCountedThreadSafeBase {
  public:
   void AddRef() const {
     assert(!adoption_required_);
     assert(!destruction_started_);
     ref_count_.fetch_add(1u, std::memory_order_relaxed);
   }
 
@@ skipping 60 matching lines @@
 {
 }
 
 inline RefCountedThreadSafeBase::~RefCountedThreadSafeBase() {
   assert(!adoption_required_);
   // Should only be destroyed as a result of |Release()|.
   assert(destruction_started_);
 }
 
 }  // namespace internal
-}  // namespace system
+}  // namespace util
 }  // namespace mojo
 
-#endif  // MOJO_EDK_SYSTEM_REF_COUNTED_INTERNAL_H_
+#endif  // MOJO_EDK_UTIL_REF_COUNTED_INTERNAL_H_