Rename "NoBarrier" memory operations to "Relaxed".

src/heap/marking.h

 // Copyright 2016 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_MARKING_H
 #define V8_MARKING_H
 
 #include "src/base/atomic-utils.h"
 #include "src/utils.h"
 
@@ skipping 53 matching lines @@
   base::Atomic32 old_value = *cell_;
   *cell_ = old_value | mask_;
   return (old_value & mask_) == 0;
 }
 
 template <>
 inline bool MarkBit::Set<MarkBit::ATOMIC>() {
   base::Atomic32 old_value;
   base::Atomic32 new_value;
   do {
-    old_value = base::NoBarrier_Load(cell_);
+    old_value = base::Relaxed_Load(cell_);
     if (old_value & mask_) return false;
     new_value = old_value | mask_;
   } while (base::Release_CompareAndSwap(cell_, old_value, new_value) !=
            old_value);
   return true;
 }
 
 template <>
 inline bool MarkBit::Get<MarkBit::NON_ATOMIC>() {
-  return (base::NoBarrier_Load(cell_) & mask_) != 0;
+  return (base::Relaxed_Load(cell_) & mask_) != 0;
 }
 
 template <>
 inline bool MarkBit::Get<MarkBit::ATOMIC>() {
   return (base::Acquire_Load(cell_) & mask_) != 0;
 }
 
 template <>
 inline bool MarkBit::Clear<MarkBit::NON_ATOMIC>() {
   base::Atomic32 old_value = *cell_;
   *cell_ = old_value & ~mask_;
   return (old_value & mask_) == mask_;
 }
 
 template <>
 inline bool MarkBit::Clear<MarkBit::ATOMIC>() {
   base::Atomic32 old_value;
   base::Atomic32 new_value;
   do {
-    old_value = base::NoBarrier_Load(cell_);
+    old_value = base::Relaxed_Load(cell_);
     if (!(old_value & mask_)) return false;
     new_value = old_value & ~mask_;
   } while (base::Release_CompareAndSwap(cell_, old_value, new_value) !=
            old_value);
   return true;
 }
 
 // Bitmap is a sequence of cells each containing fixed number of bits.
 class Bitmap {
  public:
@@ skipping 345 matching lines @@
   }
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(Marking);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MARKING_H_