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

blimp/engine/app/blimp_content_main_delegate.cc

 // 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.
 
 #include "blimp/engine/app/blimp_content_main_delegate.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
@@ skipping 60 matching lines @@
 }
 
 void BlimpContentMainDelegate::InitializeResourceBundle() {
   base::FilePath pak_file;
   bool pak_file_valid = PathService::Get(base::DIR_MODULE, &pak_file);
   CHECK(pak_file_valid);
   pak_file = pak_file.Append(FILE_PATH_LITERAL("blimp_engine.pak"));
   ui::ResourceBundle::InitSharedInstanceWithPakPath(pak_file);
 }
 
+void BlimpContentMainDelegate::SetContentBrowserClientForTesting(
+    std::unique_ptr<BlimpContentBrowserClient> browser_client_ptr) {
+  browser_client_ = std::move(browser_client_ptr);
+}
+
 content::ContentBrowserClient*
 BlimpContentMainDelegate::CreateContentBrowserClient() {
   DCHECK(!browser_client_);
   browser_client_.reset(new BlimpContentBrowserClient);
   return browser_client_.get();
 }
 
 content::ContentRendererClient*
 BlimpContentMainDelegate::CreateContentRendererClient() {
   DCHECK(!renderer_client_);
   renderer_client_.reset(new BlimpContentRendererClient);
   return renderer_client_.get();
 }
 
 }  // namespace engine
 }  // namespace blimp