[chromedriver] Fix race where we might not wait for page load after navigating.

chrome/test/chromedriver/chrome/devtools_event_listener.cc

Index: chrome/test/chromedriver/chrome/devtools_event_listener.cc
diff --git a/chrome/test/chromedriver/chrome/devtools_event_listener.cc b/chrome/test/chromedriver/chrome/devtools_event_listener.cc
new file mode 100644
index 0000000000000000000000000000000000000000..30a023ecae75d245905f9c00037a05b0b2dbd05c
--- /dev/null
+++ b/chrome/test/chromedriver/chrome/devtools_event_listener.cc
@@ -0,0 +1,23 @@
+// Copyright (c) 2013 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/test/chromedriver/chrome/devtools_event_listener.h"
+
+#include "chrome/test/chromedriver/chrome/status.h"
+
+DevToolsEventListener::~DevToolsEventListener() {}
+
+Status DevToolsEventListener::OnConnected(DevToolsClient* client) {
+  return Status(kOk);
+}
+
+void DevToolsEventListener::OnEvent(DevToolsClient* client,
+                                    const std::string& method,
+                                    const base::DictionaryValue& params) {}
+
+Status DevToolsEventListener::OnCommandSuccess(
+    DevToolsClient* client,
+    const std::string& method) {
+  return Status(kOk);
+}