Native api to get OAuth2 access tokens in Print Preview Web UI.

chrome/browser/ui/webui/print_preview/print_preview_handler.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 97 matching lines @@
   void HandleShowSystemDialog(const base::ListValue* args);
 
   // Callback for the signin dialog to call once signin is complete.
   static void OnSigninComplete(
       const base::WeakPtr<PrintPreviewHandler>& handler);
 
   // Brings up a dialog to allow the user to sign into cloud print.
   // |args| is unused.
   void HandleSignin(const base::ListValue* args);
 
+  // Generates new token and sends back to UI.
+  void HandleGetAccessToken(const base::ListValue* args);
+
   // Brings up a web page to allow the user to configure cloud print.
   // |args| is unused.
   void HandleManageCloudPrint(const base::ListValue* args);
 
   // Gathers UMA stats when the print preview dialog is about to close.
   // |args| is unused.
   void HandleClosePreviewDialog(const base::ListValue* args);
 
   // Asks the browser to show the native printer management dialog.
   // |args| is unused.
@@ skipping 16 matching lines @@
   // NOTE: This is needed to open FedEx confirmation window as a new tab.
   // Javascript's "window.open" opens a new window popup (since initiated from
   // async HTTP request) and worse yet, on Windows and Chrome OS, the opened
   // window opens behind the initiator window.
   void HandleForceOpenNewTab(const base::ListValue* args);
 
   void SendInitialSettings(
       const std::string& default_printer,
       const std::string& cloud_print_data);
 
+  // Send OAuth2 access token.
+  void SendAccessToken(const std::string& type,
+                       const std::string& access_token);
+
   // Sends the printer capabilities to the Web UI. |settings_info| contains
   // printer capabilities information.
   void SendPrinterCapabilities(const base::DictionaryValue& settings_info);
 
   // Sends error notification to the Web UI when unable to return the printer
   // capabilities.
   void SendFailedToGetPrinterCapabilities(const std::string& printer_name);
 
   // Send the list of printers to the Web UI.
   void SetupPrinterList(const base::ListValue& printers);
@@ skipping 27 matching lines @@
   void PostPrintToPdfTask();
 
   // Populates |settings| according to the current locale.
   void GetNumberFormatAndMeasurementSystem(base::DictionaryValue* settings);
 
   static printing::StickySettings* GetStickySettings();
 
   bool GetPreviewDataAndTitle(scoped_refptr<base::RefCountedBytes>* data,
                               string16* title) const;
 
+  void InitTokenService();
+
   // Pointer to current print system.
   scoped_refptr<printing::PrintBackend> print_backend_;
 
   // The underlying dialog object.
   scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
 
   // A count of how many requests received to regenerate preview data.
   // Initialized to 0 then incremented and emitted to a histogram.
   int regenerate_preview_request_count_;
 
   // A count of how many requests received to show manage printers dialog.
   int manage_printers_dialog_request_count_;
   int manage_cloud_printers_dialog_request_count_;
 
   // Whether we have already logged a failed print preview.
   bool reported_failed_preview_;
 
   // Whether we have already logged the number of printers this session.
   bool has_logged_printers_count_;
 
   // Holds the path to the print to pdf request. It is empty if no such request
   // exists.
   scoped_ptr<base::FilePath> print_to_pdf_path_;
 
+  // Holds token service to get OAuth2 access tokens.
+  class AccessTokenService;
+  scoped_ptr<AccessTokenService> token_service_;
+
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_