Update implementation of atomics with latest Chromium version but use compiler builtin atomics

src/base/atomicops_internals_x86_msvc.h

Index: src/base/atomicops_internals_x86_msvc.h
diff --git a/src/base/atomicops_internals_x86_msvc.h b/src/base/atomicops_internals_x86_msvc.h
index c37bc78df6d172653977de1270eee3159975e18a..12c0129c8349cd47ff7e9089ba4bb99af4fb580b 100644
--- a/src/base/atomicops_internals_x86_msvc.h
+++ b/src/base/atomicops_internals_x86_msvc.h
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// This file is an internal atomic implementation, use atomicops.h instead.
+// This file is an internal atomic implementation, use base/atomicops.h instead.
 
 #ifndef V8_BASE_ATOMICOPS_INTERNALS_X86_MSVC_H_
 #define V8_BASE_ATOMICOPS_INTERNALS_X86_MSVC_H_
@@ -26,25 +26,23 @@ inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,
                                          Atomic32 old_value,
                                          Atomic32 new_value) {
   LONG result = InterlockedCompareExchange(
-      reinterpret_cast<volatile LONG*>(ptr),
-      static_cast<LONG>(new_value),
+      reinterpret_cast<volatile LONG*>(ptr), static_cast<LONG>(new_value),
       static_cast<LONG>(old_value));
   return static_cast<Atomic32>(result);
 }
 
 inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr,
                                          Atomic32 new_value) {
-  LONG result = InterlockedExchange(
-      reinterpret_cast<volatile LONG*>(ptr),
-      static_cast<LONG>(new_value));
+  LONG result = InterlockedExchange(reinterpret_cast<volatile LONG*>(ptr),
+                                    static_cast<LONG>(new_value));
   return static_cast<Atomic32>(result);
 }
 
 inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
                                         Atomic32 increment) {
-  return InterlockedExchangeAdd(
-      reinterpret_cast<volatile LONG*>(ptr),
-      static_cast<LONG>(increment)) + increment;
+  return InterlockedExchangeAdd(reinterpret_cast<volatile LONG*>(ptr),
+                                static_cast<LONG>(increment)) +
+         increment;
 }
 
 inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr,
@@ -52,9 +50,6 @@ inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr,
   return Barrier_AtomicIncrement(ptr, increment);
 }
 
-#if !(defined(_MSC_VER) && _MSC_VER >= 1400)
-#error "We require at least vs2005 for MemoryBarrier"
-#endif
 inline void MemoryBarrier() {
 #if defined(V8_HOST_ARCH_64_BIT)
   // See #undef and note at the top of this file.
@@ -117,7 +112,7 @@ inline Atomic32 Release_Load(volatile const Atomic32* ptr) {
 
 // 64-bit low-level operations on 64-bit platform.
 
-STATIC_ASSERT(sizeof(Atomic64) == sizeof(PVOID));
+static_assert(sizeof(Atomic64) == sizeof(PVOID), "atomic word is atomic");
 
 inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr,
                                          Atomic64 old_value,