clang/win: Let some chromium_code targets build with -Wextra.

content/browser/accessibility/accessibility_tree_formatter_win.cc

 // Copyright (c) 2012 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 "content/browser/accessibility/accessibility_tree_formatter.h"
 
 #include <oleacc.h>
 
 #include <string>
 
@@ skipping 280 matching lines @@
   if (show_ids_) {
     int id_value;
     dict.GetInteger("id", &id_value);
     WriteAttribute(true, base::IntToString16(id_value), &line);
   }
 
   base::string16 role_value;
   dict.GetString("role", &role_value);
   WriteAttribute(true, base::UTF16ToUTF8(role_value), &line);
 
-  for (int i = 0; i < arraysize(ALL_ATTRIBUTES); i++) {
-    const char* attribute_name = ALL_ATTRIBUTES[i];
+  for (const char* attribute_name : ALL_ATTRIBUTES) {
     const base::Value* value;
     if (!dict.Get(attribute_name, &value))
       continue;
 
     switch (value->GetType()) {
       case base::Value::TYPE_STRING: {
         base::string16 string_value;
         value->GetAsString(&string_value);
         WriteAttribute(false,
                        base::StringPrintf(L"%ls='%ls'",
@@ skipping 85 matching lines @@
 const std::string AccessibilityTreeFormatter::GetAllowString() {
   return "@WIN-ALLOW:";
 }
 
 // static
 const std::string AccessibilityTreeFormatter::GetDenyString() {
   return "@WIN-DENY:";
 }
 
 }  // namespace content