Renderers should obtain browser InterfaceProvider by connecting to browser

content/shell/browser/layout_test/layout_test_content_browser_client.h

 // Copyright 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_BROWSER_LAYOUT_TEST_LAYOUT_TEST_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_SHELL_BROWSER_LAYOUT_TEST_LAYOUT_TEST_CONTENT_BROWSER_CLIENT_H_
 
 #include "content/shell/browser/shell_content_browser_client.h"
 
 namespace content {
 
 class LayoutTestBrowserContext;
 class LayoutTestNotificationManager;
 
 class LayoutTestContentBrowserClient : public ShellContentBrowserClient {
  public:
   // Gets the current instance.
   static LayoutTestContentBrowserClient* Get();
 
   LayoutTestContentBrowserClient();
   ~LayoutTestContentBrowserClient() override;
 
   LayoutTestBrowserContext* GetLayoutTestBrowserContext();
 
   // Implements the PlatformNotificationService interface.
   LayoutTestNotificationManager* GetLayoutTestNotificationManager();
 
   // ContentBrowserClient overrides.
   void RenderProcessWillLaunch(RenderProcessHost* host) override;
+  void ExposeInterfacesToRenderer(
+      shell::InterfaceRegistry* registry,
+      RenderProcessHost* render_process_host) override;
   void OverrideWebkitPrefs(RenderViewHost* render_view_host,
                            WebPreferences* prefs) override;
   void ResourceDispatcherHostCreated() override;
   void AppendExtraCommandLineSwitches(base::CommandLine* command_line,
                                       int child_process_id) override;
   BrowserMainParts* CreateBrowserMainParts(
       const MainFunctionParams& parameters) override;
 
   PlatformNotificationService* GetPlatformNotificationService() override;
 
  private:
   std::unique_ptr<LayoutTestNotificationManager>
       layout_test_notification_manager_;
 };
 
 }  // content
 
 #endif  // CONTENT_SHELL_BROWSER_LAYOUT_TEST_LAYOUT_TEST_CONTENT_BROWSER_CLIENT_H_