Remove use of void** from HttpResponseHeaders::EnumerateHeaderLines

extensions/browser/api/mime_handler_private/mime_handler_private.cc

 // Copyright 2015 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/mime_handler_private/mime_handler_private.h"
 
 #include <utility>
 
 #include "base/strings/string_util.h"
 #include "content/public/browser/stream_handle.h"
 #include "content/public/browser/stream_info.h"
 #include "content/public/common/content_constants.h"
 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.h"
 #include "extensions/common/constants.h"
 #include "mojo/public/cpp/bindings/map.h"
 #include "net/http/http_response_headers.h"
 
 namespace extensions {
 namespace {
 
 mojo::Map<mojo::String, mojo::String> CreateResponseHeadersMap(
     const net::HttpResponseHeaders* headers) {
   std::map<std::string, std::string> result;
   if (!headers)
     return mojo::Map<mojo::String, mojo::String>::From(result);
 
-  void* iter = nullptr;
+  size_t iter = 0;
   std::string header_name;
   std::string header_value;
   while (headers->EnumerateHeaderLines(&iter, &header_name, &header_value)) {
     // mojo strings must be UTF-8 and headers might not be, so drop any headers
     // that aren't ASCII. The PDF plugin does not use any headers with non-ASCII
     // names and non-ASCII values are never useful for the headers the plugin
     // does use.
     //
     // TODO(sammc): Send as bytes instead of a string and let the client decide
     // how to decode.
@@ skipping 78 matching lines @@
     result->original_url = info->original_url.spec();
   }
 
   result->stream_url = info->handle->GetURL().spec();
   result->response_headers =
       extensions::CreateResponseHeadersMap(info->response_headers.get());
   return result;
 }
 
 }  // namespace mojo