[Blimp] Refactor Blimp test engine with embedded test server and URL rewriting

blimp/engine/testing/app/blimp_browser_testing_main_parts.h

+// 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.
+
+#ifndef BLIMP_ENGINE_TESTING_APP_BLIMP_BROWSER_TESTING_MAIN_PARTS_H_
+#define BLIMP_ENGINE_TESTING_APP_BLIMP_BROWSER_TESTING_MAIN_PARTS_H_
+
+#include "blimp/engine/app/blimp_browser_main_parts.h"
+
+namespace net {
+class NetLog;
+}
+
+namespace content {
+struct MainFunctionParams;
+}
+
+namespace blimp {
+namespace engine {
+
+class BlimpEngineConfig;
+class BlimpEngineSession;
+class SettingsManager;
+
+class BlimpBrowserTestingMainParts : public BlimpBrowserMainParts {
+ public:
+  explicit BlimpBrowserTestingMainParts(
+      const content::MainFunctionParams& parameters);
+  ~BlimpBrowserTestingMainParts() = default;
+
+  // Override content::BrowserMainParts implementation
+  // in class BlimpBrowserMainParts.
+  void PreEarlyInitialization() override;

[jbudorick, 2016/12/13 18:31:03]

Could we set up the ETS in one of these two functions?

[shenghuazhang, 2017/01/05 23:36:33]

This should be the correct place to set up the ETS. In next patch I would set it
up in PreMainMessageLoopRun(), right before SetEngineSessionForTesting starts. 

+  void PreMainMessageLoopRun() override;
+
+ protected:
+  std::unique_ptr<BlimpEngineConfig> engine_config_;
+  std::unique_ptr<net::NetLog> net_log_;
+  std::unique_ptr<SettingsManager> settings_manager_;
+  std::unique_ptr<BlimpEngineSession> engine_session_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlimpBrowserTestingMainParts);
+};
+
+}  // namespace engine
+}  // namespace blimp
+
+#endif  // BLIMP_ENGINE_TESTING_APP_BLIMP_BROWSER_TESTING_MAIN_PARTS_H_