Remove use of void** from HttpResponseHeaders::EnumerateHeaderLines

extensions/browser/api/web_request/web_request_event_details.cc

 // Copyright 2016 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/web_request/web_request_event_details.h"
 
 #include "base/callback.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_frame_host.h"
@@ skipping 115 matching lines @@
     dict_.SetInteger(keys::kStatusCodeKey, request->GetResponseCode());
     dict_.SetString(keys::kStatusLineKey, "");
   } else {
     dict_.SetInteger(keys::kStatusCodeKey, response_headers->response_code());
     dict_.SetString(keys::kStatusLineKey, response_headers->GetStatusLine());
   }
 
   if (extra_info_spec_ & ExtraInfoSpec::RESPONSE_HEADERS) {
     base::ListValue* headers = new base::ListValue();
     if (response_headers) {
-      void* iter = nullptr;
+      size_t iter = 0;
       std::string name;
       std::string value;
       while (response_headers->EnumerateHeaderLines(&iter, &name, &value))
         headers->Append(helpers::CreateHeaderDictionary(name, value));
     }
     response_headers_.reset(headers);
   }
 }
 
 void WebRequestEventDetails::SetResponseSource(const net::URLRequest* request) {
@@ skipping 43 matching lines @@
     scoped_ptr<WebRequestEventDetails> self,
     const DeterminedFrameIdCallback& callback,
     int extension_api_frame_id,
     int extension_api_parent_frame_id) {
   dict_.SetInteger(keys::kFrameIdKey, extension_api_frame_id);
   dict_.SetInteger(keys::kParentFrameIdKey, extension_api_parent_frame_id);
   callback.Run(std::move(self));
 }
 
 }  // namespace extensions