Convert ARRAYSIZE_UNSAFE -> arraysize in chrome/browser/.

chrome/browser/global_keyboard_shortcuts_mac.mm

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <AppKit/NSEvent.h>
 #include <Carbon/Carbon.h>
 
 #include "chrome/browser/global_keyboard_shortcuts_mac.h"
 
 #include "base/basictypes.h"
@@ skipping 201 matching lines @@
     // Alphabetic characters aren't mirrored, go with the raw character.
     // [A previous partial comment said something about Dvorak?]
     if (isalpha(rawChar))
       return rawChar;
 
     // http://crbug.com/42517
     // http://crbug.com/315379
     // In RTL keyboard layouts, Cocoa mirrors characters in the string
     // returned by [event charactersIgnoringModifiers].  In this case, return
     // the raw (unmirrored) char.
-    for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kCharMapping); ++i) {
+    for (size_t i = 0; i < arraysize(kCharMapping); ++i) {
       if (rawChar == kCharMapping[i].rawChar &&
           noModifiersChar == kCharMapping[i].unmodChar) {
         return kCharMapping[i].targetChar;
       }
     }
 
     // opt/alt modifier is set (e.g. on german layout we want '{' for opt-8).
     if ([event modifierFlags] & NSAlternateKeyMask)
       return rawChar;
   }
 
   return noModifiersChar;
 }