http: fix style and naming

Author: caiolrm

src/node_http_parser_impl.h

@@ -180,7 +180,7 @@ class Parser : public AsyncWrap, public StreamListener {
 
 
   int on_url(const char* at, size_t length) {
-    int rv = TrackHeader(length, before_headers);
+    int rv = TrackHeader(length, kBeforeHeaders);
     if (rv != 0) {
       return rv;
     }
@@ -825,19 +825,20 @@ class Parser : public AsyncWrap, public StreamListener {
     got_exception_ = false;
   }
 
-  enum tracking_position {
-    before_headers,
-    after_request_line
+  enum HeaderTrackState {
+    kBeforeHeaders,
+    kAfterRequestLine
   };
-  int TrackHeader(size_t len, enum tracking_position pos = after_request_line) {
+
+  int TrackHeader(size_t len, enum HeaderTrackState pos = kAfterRequestLine) {
 #ifdef NODE_EXPERIMENTAL_HTTP
     header_nread_ += len;
-    if (pos == before_headers &&
+    if (pos == kBeforeHeaders &&
         header_nread_ >= per_process::cli_options->max_http_uri_size) {
       llhttp_set_error_reason(&parser_,
                               "HPE_URI_OVERFLOW:URI overflow");
       return HPE_USER;
-    } else if (pos == after_request_line &&
+    } else if (pos == kAfterRequestLine &&
         header_nread_ >= per_process::cli_options->max_http_header_size) {
       llhttp_set_error_reason(&parser_, "HPE_HEADER_OVERFLOW:Header overflow");
       return HPE_USER;