Remove use of void** from HttpResponseHeaders::EnumerateHeaderLines

chrome/browser/mod_pagespeed/mod_pagespeed_metrics.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 "chrome/browser/mod_pagespeed/mod_pagespeed_metrics.h"
 
 #include <stdio.h>
 
 #include <string>
 
@@ skipping 68 matching lines @@
     return;
   }
 
   // Bucket 0 counts every response seen.
   UMA_HISTOGRAM_ENUMERATION(kPagespeedServerHistogram,
                             PAGESPEED_TOTAL_RESPONSES,
                             PAGESPEED_SERVER_MAXIMUM);
   if (!response_headers)
     return;
 
-  void* iter = nullptr;
+  size_t iter = 0;
   std::string name;
   std::string value;
   while (response_headers->EnumerateHeaderLines(&iter, &name, &value)) {
     if (name == kModPagespeedHeader) {
       // Bucket 1 counts occurrences of the X-Mod-Pagespeed header.
       UMA_HISTOGRAM_ENUMERATION(kPagespeedServerHistogram,
                                 PAGESPEED_MOD_PAGESPEED_SERVER,
                                 PAGESPEED_SERVER_MAXIMUM);
       if (!value.empty()) {
         // If the header value is in the X-Mod-Pagespeed version number format
@@ skipping 34 matching lines @@
                                     PAGESPEED_UNKNOWN_SERVER,
                                     PAGESPEED_SERVER_MAXIMUM);
         }
       }
       break;
     }
   }
 }
 
 }  // namespace mod_pagespeed