Add Arm64 atomicops to base.
These are taken from the implementation in v8/src/atomicops_internals_a64_gcc.h
BUG=354405
Review URL: https://codereview.chromium.org/206373005
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@258985 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/base/atomicops.h b/base/atomicops.h
index 3d15e03..d9505811 100644
--- a/base/atomicops.h
+++ b/base/atomicops.h
@@ -146,8 +146,10 @@
#include "base/atomicops_internals_mac.h"
#elif defined(OS_NACL)
#include "base/atomicops_internals_gcc.h"
-#elif defined(COMPILER_GCC) && defined(ARCH_CPU_ARM_FAMILY)
+#elif defined(COMPILER_GCC) && defined(ARCH_CPU_ARMEL)
#include "base/atomicops_internals_arm_gcc.h"
+#elif defined(COMPILER_GCC) && defined(ARCH_CPU_ARM64)
+#include "base/atomicops_internals_arm64_gcc.h"
#elif defined(COMPILER_GCC) && defined(ARCH_CPU_X86_FAMILY)
#include "base/atomicops_internals_x86_gcc.h"
#elif defined(COMPILER_GCC) && defined(ARCH_CPU_MIPS_FAMILY)
