Add a new app API to enable watchdog behavior restarts in kiosk apps

extensions/browser/test_extensions_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 EXTENSIONS_BROWSER_TEST_EXTENSIONS_BROWSER_CLIENT_H_
 #define EXTENSIONS_BROWSER_TEST_EXTENSIONS_BROWSER_CLIENT_H_
 
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 96 matching lines @@
       std::unique_ptr<base::ListValue> args) override;
   net::NetLog* GetNetLog() override;
   ExtensionCache* GetExtensionCache() override;
   bool IsBackgroundUpdateAllowed() override;
   bool IsMinBrowserVersionSupported(const std::string& min_version) override;
   ExtensionWebContentsObserver* GetExtensionWebContentsObserver(
       content::WebContents* web_contents) override;
   scoped_refptr<update_client::UpdateClient> CreateUpdateClient(
       content::BrowserContext* context) override;
 
+  ExtensionSystemProvider* extension_system_factory() {
+    return extension_system_factory_;
+  }
+
  private:
   content::BrowserContext* main_context_;       // Not owned.
   content::BrowserContext* incognito_context_;  // Not owned, defaults to NULL.
 
   // Not owned, defaults to NULL.
   ProcessManagerDelegate* process_manager_delegate_;
 
   // Not owned, defaults to NULL.
   ExtensionSystemProvider* extension_system_factory_;
 
   std::unique_ptr<ExtensionCache> extension_cache_;
 
   base::Callback<update_client::UpdateClient*(void)> update_client_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TestExtensionsBrowserClient);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_TEST_EXTENSIONS_BROWSER_CLIENT_H_