TSan: Move definition of AtomicOps_x86CPUFeatureStruct into v8::internal namespace

This matches other atomicops_internals_* files.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/21534002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16019 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/atomicops_internals_tsan.h

@@ -32,6 +32,12 @@
 #ifndef V8_ATOMICOPS_INTERNALS_TSAN_H_
 #define V8_ATOMICOPS_INTERNALS_TSAN_H_
 
+namespace v8 {
+namespace internal {
+
+#ifndef TSAN_INTERFACE_ATOMIC_H
+#define TSAN_INTERFACE_ATOMIC_H
+
 // This struct is not part of the public API of this module; clients may not
 // use it.  (However, it's exported via BASE_EXPORT because clients implicitly
 // do use it at link time by inlining these functions.)
@@ -47,12 +53,6 @@ extern struct AtomicOps_x86CPUFeatureStruct
 
 #define ATOMICOPS_COMPILER_BARRIER() __asm__ __volatile__("" : : : "memory")
 
-namespace v8 {
-namespace internal {
-
-#ifndef TSAN_INTERFACE_ATOMIC_H
-#define TSAN_INTERFACE_ATOMIC_H
-
 #ifdef __cplusplus
 extern "C" {
 #endif