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

blimp/engine/app/blimp_content_main_delegate.h

 // Copyright 2015 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_APP_BLIMP_CONTENT_MAIN_DELEGATE_H_
 #define BLIMP_ENGINE_APP_BLIMP_CONTENT_MAIN_DELEGATE_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "blimp/engine/common/blimp_content_client.h"
 #include "content/public/app/content_main_delegate.h"
 
 namespace blimp {
 namespace engine {
 
 class BlimpContentBrowserClient;
 class BlimpContentRendererClient;
 
 class BlimpContentMainDelegate : public content::ContentMainDelegate {
  public:
   BlimpContentMainDelegate();
   ~BlimpContentMainDelegate() override;
 
+  BlimpContentBrowserClient* GetBlimpContentBrowserClient();

[Kevin M, 2016/05/05 20:28:51]

This is a simple getter, so how about "browser_client()"?

[haibinlu, 2016/05/05 22:41:36]

Done.

+
   // content::ContentMainDelegate implementation.
   bool BasicStartupComplete(int* exit_code) override;
   void PreSandboxStartup() override;
   content::ContentBrowserClient* CreateContentBrowserClient() override;
   content::ContentRendererClient* CreateContentRendererClient() override;
 
+  static BlimpContentMainDelegate* GetInstanceForTesting();
+
  private:
   void InitializeResourceBundle();
 
   std::unique_ptr<BlimpContentBrowserClient> browser_client_;
   std::unique_ptr<BlimpContentRendererClient> renderer_client_;
   BlimpContentClient content_client_;
 
   DISALLOW_COPY_AND_ASSIGN(BlimpContentMainDelegate);
 };
 
 }  // namespace engine
 }  // namespace blimp
 
 #endif  // BLIMP_ENGINE_APP_BLIMP_CONTENT_MAIN_DELEGATE_H_