Remove use of void** from HttpResponseHeaders::EnumerateHeaderLines

chrome/browser/safe_browsing/threat_details_cache.cc

Index: chrome/browser/safe_browsing/threat_details_cache.cc
diff --git a/chrome/browser/safe_browsing/threat_details_cache.cc b/chrome/browser/safe_browsing/threat_details_cache.cc
index 4782bdea6c64ed8c3cb3a76a7bcc26f855a543a0..0e8361aae2bd20178c898e18d4c8f1a3c903aadf 100644
--- a/chrome/browser/safe_browsing/threat_details_cache.cc
+++ b/chrome/browser/safe_browsing/threat_details_cache.cc
@@ -151,9 +151,9 @@ void ThreatDetailsCacheCollector::ReadResponse(
   ClientSafeBrowsingReportRequest::HTTPResponse* pb_response =
       pb_resource->mutable_response();
   pb_response->mutable_firstline()->set_code(headers->response_code());
-  void* iter = NULL;
+  size_t iter = 0;
   std::string name, value;
-  while (headers->EnumerateHeaderLines(&iter, &name, &value)) {
+  while (headers->EnumerateHeaderLines(iter, &name, &value)) {
     ClientSafeBrowsingReportRequest::HTTPHeader* pb_header =
         pb_response->add_headers();
     pb_header->set_name(name);