Explicitly initialize secondary renderers for layout tests.

content/shell/renderer/layout_test/layout_test_render_thread_observer.h

 // Copyright (c) 2014 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 CONTENT_SHELL_RENDERER_LAYOUT_TEST_LAYOUT_TEST_RENDER_THREAD_OBSERVER_H_
 #define CONTENT_SHELL_RENDERER_LAYOUT_TEST_LAYOUT_TEST_RENDER_THREAD_OBSERVER_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "content/public/renderer/render_thread_observer.h"
 #include "ipc/ipc_platform_file.h"
 
 namespace blink {
 class WebFrame;
 }
 
 namespace test_runner {
 class WebTestDelegate;
 class WebTestInterfaces;
 }
 
 namespace content {
 
-class RenderView;
-class BlinkTestRunner;
-
 class LayoutTestRenderThreadObserver : public RenderThreadObserver {
  public:
   static LayoutTestRenderThreadObserver* GetInstance();
 
   LayoutTestRenderThreadObserver();
   ~LayoutTestRenderThreadObserver() override;
 
   void SetTestDelegate(test_runner::WebTestDelegate* delegate);
-  void SetMainWindow(RenderView* view);
 
   // RenderThreadObserver implementation.
   void OnRenderProcessShutdown() override;
   bool OnControlMessageReceived(const IPC::Message& message) override;
 
   test_runner::WebTestDelegate* test_delegate() const {
     return test_delegate_;
   }
   test_runner::WebTestInterfaces* test_interfaces() const {
     return test_interfaces_.get();
   }
-  BlinkTestRunner* main_test_runner() const { return main_test_runner_; }
   const base::FilePath& webkit_source_dir() const { return webkit_source_dir_; }
 
  private:
   // Message handlers.
   void OnSetWebKitSourceDir(const base::FilePath& webkit_source_dir);
 
-  BlinkTestRunner* main_test_runner_;
   test_runner::WebTestDelegate* test_delegate_;
   std::unique_ptr<test_runner::WebTestInterfaces> test_interfaces_;
 
   base::FilePath webkit_source_dir_;
 
   DISALLOW_COPY_AND_ASSIGN(LayoutTestRenderThreadObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_RENDERER_LAYOUT_TEST_LAYOUT_TEST_RENDER_THREAD_OBSERVER_H_