Remove use of void** from HttpResponseHeaders::EnumerateHeaderLines

net/spdy/spdy_http_utils.cc

Index: net/spdy/spdy_http_utils.cc
diff --git a/net/spdy/spdy_http_utils.cc b/net/spdy/spdy_http_utils.cc
index 8692305bf56f4ec342e1e13e7b0f3408aecf6dd0..d0729d6b2455537e5c2b8039a50d157a0b5dce11 100644
--- a/net/spdy/spdy_http_utils.cc
+++ b/net/spdy/spdy_http_utils.cc
@@ -164,7 +164,7 @@ void CreateSpdyHeadersFromHttpResponse(
       std::find(after_version + 1, status_line.end(), ' ');
   (*headers)[status_key] = std::string(after_version + 1, after_status);
 
-  void* iter = NULL;
+  size_t iter = 0;
   std::string raw_name, value;
   while (response_headers.EnumerateHeaderLines(&iter, &raw_name, &value)) {
     std::string name = base::ToLowerASCII(raw_name);