[chromedriver] Add page loading strategy to capabilities

chrome/test/chromedriver/chrome/non_blocking_navigation_tracker.cc

Index: chrome/test/chromedriver/chrome/non_blocking_navigation_tracker.cc
diff --git a/chrome/test/chromedriver/chrome/non_blocking_navigation_tracker.cc b/chrome/test/chromedriver/chrome/non_blocking_navigation_tracker.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9619c199b74fdcfd4bc6a075d66b686c567f0892
--- /dev/null
+++ b/chrome/test/chromedriver/chrome/non_blocking_navigation_tracker.cc
@@ -0,0 +1,17 @@
+// Copyright (c) 2016 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/non_blocking_navigation_tracker.h"
+
+NonBlockingNavigationTracker::~NonBlockingNavigationTracker() {}
+
+Status NonBlockingNavigationTracker::IsPendingNavigation(
+    const std::string& frame_id,
+    const Timeout* timeout,
+    bool* is_pending) {
+  *is_pending = false;
+  return Status(kOk);
+}
+
+void NonBlockingNavigationTracker::set_timed_out(bool timed_out) {}