Convert ARRAYSIZE_UNSAFE -> arraysize in chrome/browser/.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 16afec50360d49181bd22d92ae9e14021711bf9f..f040401a3f49ea33b8ace1e2c2af85337cb200a7 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -106,7 +106,7 @@ void AddOsStrings(unsigned bitmask, base::ListValue* list) {
     {kOsAndroid, "Android"},
     {kOsCrOSOwnerOnly, "Chrome OS (owner only)"},
   };
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kBitsToOs); ++i)
+  for (size_t i = 0; i < arraysize(kBitsToOs); ++i)
     if (bitmask & kBitsToOs[i].bit)
       list->Append(new base::StringValue(kBitsToOs[i].name));
 }