Move atomic-utils.h into base/

src/base/atomic-utils.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ATOMIC_UTILS_H_
 #define V8_ATOMIC_UTILS_H_
 
 #include <limits.h>
 
 #include "src/base/atomicops.h"
 #include "src/base/macros.h"
 
 namespace v8 {
-namespace internal {
+namespace base {
 
 template <class T>
 class AtomicNumber {
  public:
   AtomicNumber() : value_(0) {}
   explicit AtomicNumber(T initial) : value_(initial) {}
 
   // Returns the newly set value.
   V8_INLINE T Increment(T increment) {
     return static_cast<T>(base::Barrier_AtomicIncrement(
@@ skipping 137 matching lines @@
     return base::Acquire_Load(&bits_);
   }
 
   V8_INLINE base::AtomicWord Mask(E element) const {
     return static_cast<base::AtomicWord>(1) << element;
   }
 
   base::AtomicWord bits_;
 };
 
-}  // namespace internal
+}  // namespace base
 }  // namespace v8
 
 #endif  // #define V8_ATOMIC_UTILS_H_