[Blimp] Adds blimp engine browser test framework and LoadUrl test.

blimp/client/session/test_client_session.cc

+// Copyright 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 "blimp/client/session/test_client_session.h"
+
+namespace blimp {
+namespace client {
+namespace {
+// Assigner is not actually used in this test.
+const char kAssignerUrl[] = "http://www.assigner.test/";
+}  // namespace
+
+TestClientSession::TestClientSession()
+    : client::BlimpClientSession(GURL(kAssignerUrl)) {}
+
+TestClientSession::~TestClientSession() {}
+
+}  // namespace client
+}  // namespace blimp