Update from https://crrev.com/305340

net/test/embedded_test_server/embedded_test_server.cc

 // Copyright (c) 2012 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 "net/test/embedded_test_server/embedded_test_server.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 97 matching lines @@
 
 HttpListenSocket::~HttpListenSocket() {
   DCHECK(thread_checker_.CalledOnValidThread());
 }
 
 void HttpListenSocket::DetachFromThread() {
   thread_checker_.DetachFromThread();
 }
 
 EmbeddedTestServer::EmbeddedTestServer()
-    : port_(-1),
+    : port_(0),
       weak_factory_(this) {
   DCHECK(thread_checker_.CalledOnValidThread());
 }
 
 EmbeddedTestServer::~EmbeddedTestServer() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (Started() && !ShutdownAndWaitUntilComplete()) {
     LOG(ERROR) << "EmbeddedTestServer failed to shut down.";
   }
@@ skipping 217 matching lines @@
           FROM_HERE, closure, run_loop.QuitClosure())) {
     return false;
   }
   run_loop.Run();
 
   return true;
 }
 
 }  // namespace test_server
 }  // namespace net