Remove use of void** from HttpResponseHeaders::EnumerateHeaderLines

extensions/browser/api/declarative_webrequest/webrequest_condition_attribute.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 "extensions/browser/api/declarative_webrequest/webrequest_condition_attribute.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <utility>
@@ skipping 676 matching lines @@
       request_data.original_response_headers;
   if (headers == NULL) {
     // Each header of an empty set satisfies (the negation of) everything;
     // OTOH, there is no header to satisfy even the most permissive test.
     return !positive_;
   }
 
   bool passed = false;  // Did some header pass TestNameValue?
   std::string name;
   std::string value;
-  void* iter = NULL;
+  size_t iter = 0;
   while (!passed && headers->EnumerateHeaderLines(&iter, &name, &value)) {
     passed |= header_matcher_->TestNameValue(name, value);
   }
 
   return (positive_ ? passed : !passed);
 }
 
 WebRequestConditionAttribute::Type
 WebRequestConditionAttributeResponseHeaders::GetType() const {
   return CONDITION_RESPONSE_HEADERS;
@@ skipping 168 matching lines @@
 bool WebRequestConditionAttributeStages::Equals(
     const WebRequestConditionAttribute* other) const {
   if (!WebRequestConditionAttribute::Equals(other))
     return false;
   const WebRequestConditionAttributeStages* casted_other =
       static_cast<const WebRequestConditionAttributeStages*>(other);
   return allowed_stages_ == casted_other->allowed_stages_;
 }
 
 }  // namespace extensions