Atomic ops: put the CPU features struct in v8::internal.

src/atomicops_internals_x86_gcc.h

Index: src/atomicops_internals_x86_gcc.h
diff --git a/src/atomicops_internals_x86_gcc.h b/src/atomicops_internals_x86_gcc.h
index 3f17fa0dcf03f53cb9b9c90b6269e259e4dd4674..6e55b50182c3231655d603a5c8178c77cfe488c3 100644
--- a/src/atomicops_internals_x86_gcc.h
+++ b/src/atomicops_internals_x86_gcc.h
@@ -30,6 +30,9 @@
 #ifndef V8_ATOMICOPS_INTERNALS_X86_GCC_H_
 #define V8_ATOMICOPS_INTERNALS_X86_GCC_H_
 
+namespace v8 {
+namespace internal {
+
 // This struct is not part of the public API of this module; clients may not
 // use it.
 // Features of this x86.  Values may not be correct before main() is run,
@@ -43,9 +46,6 @@ extern struct AtomicOps_x86CPUFeatureStruct AtomicOps_Internalx86CPUFeatures;
 
 #define ATOMICOPS_COMPILER_BARRIER() __asm__ __volatile__("" : : : "memory")
 
-namespace v8 {
-namespace internal {
-
 // 32-bit low-level operations on any platform.
 
 inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,