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

blimp/engine/testing/app/test_blimp_content_browser_client.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_TEST_BLIMP_CONTENT_BROWSER_CLIENT_H_
+#define BLIMP_ENGINE_TESTING_APP_TEST_BLIMP_CONTENT_BROWSER_CLIENT_H_
+
+#include "blimp/engine/app/blimp_content_browser_client.h"
+
+namespace blimp {
+namespace engine {
+
+class BlimpBrowserMainParts;
+
+// Blimp testing implementation of ContentBrowserClient. Class to extend
+// class BlimpContentBrowserClient for testing. I.e. This overrides method
+// CreateBrowserMainParts(), replacing the use of BlimpBrowserMainParts
+// by enabling TestBlimpBrowserMainParts.
+class TestBlimpContentBrowserClient : public BlimpContentBrowserClient {
+ public:
+  TestBlimpContentBrowserClient();
+  ~TestBlimpContentBrowserClient() = default;
+
+  // BlimpContentBrowserClient implementation.
+  content::BrowserMainParts* CreateBrowserMainParts(
+      const content::MainFunctionParams& parameters) override;
+
+ private:
+  BlimpBrowserMainParts* blimp_browser_main_parts_ = nullptr;
+};
+
+}  // namespace engine
+}  // namespace blimp
+
+#endif  // BLIMP_ENGINE_TESTING_APP_TEST_BLIMP_CONTENT_BROWSER_CLIENT_H_