headless: Make it possible to configure an HTTP proxy

headless/lib/browser/headless_browser_context.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 HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_CONTEXT_H_
 #define HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_CONTEXT_H_
 
 #include "base/files/file_path.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/content_browser_client.h"
@@ skipping 26 matching lines @@
   content::ResourceContext* GetResourceContext() override;
   content::DownloadManagerDelegate* GetDownloadManagerDelegate() override;
   content::BrowserPluginGuestManager* GetGuestManager() override;
   storage::SpecialStoragePolicy* GetSpecialStoragePolicy() override;
   content::PushMessagingService* GetPushMessagingService() override;
   content::SSLHostStateDelegate* GetSSLHostStateDelegate() override;
   content::PermissionManager* GetPermissionManager() override;
   content::BackgroundSyncController* GetBackgroundSyncController() override;
 
   const HeadlessBrowser::Options& options() const { return options_; }
+  void SetOptionsForTesting(const HeadlessBrowser::Options& options);
 
   // Configure the URL request context getter to be used for serving URL
   // requests in this browser instance.
   void SetURLRequestContextGetter(
       scoped_refptr<net::URLRequestContextGetter> url_request_context_getter);
 
  private:
   // Performs initialization of the HeadlessBrowserContext while IO is still
   // allowed on the current thread.
   void InitWhileIOAllowed();
 
   base::FilePath path_;
   scoped_ptr<HeadlessResourceContext> resource_context_;
   HeadlessBrowser::Options options_;
 
   DISALLOW_COPY_AND_ASSIGN(HeadlessBrowserContext);
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_CONTEXT_H_