Convert ARRAYSIZE_UNSAFE -> arraysize in base/.

base/debug/stack_trace_posix.cc

Index: base/debug/stack_trace_posix.cc
diff --git a/base/debug/stack_trace_posix.cc b/base/debug/stack_trace_posix.cc
index ae40d7c9c13ca4921dc1f15ede8685b8e2e3060e..25acbe0b687f423c9d36150e2548e32a0c660f6c 100644
--- a/base/debug/stack_trace_posix.cc
+++ b/base/debug/stack_trace_posix.cc
@@ -343,7 +343,7 @@ void StackDumpSignalHandler(int signal, siginfo_t* info, void* void_context) {
   const int kRegisterPadding = 16;
 #endif
 
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(registers); i++) {
+  for (size_t i = 0; i < arraysize(registers); i++) {
     PrintToStderr(registers[i].label);
     internal::itoa_r(registers[i].value, buf, sizeof(buf),
                      16, kRegisterPadding);