Use service process to collect printers.

chrome/browser/printing/cloud_print/cloud_print_proxy_service.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_PRINTING_CLOUD_PRINT_CLOUD_PRINT_PROXY_SERVICE_H_
 #define CHROME_BROWSER_PRINTING_CLOUD_PRINT_CLOUD_PRINT_PROXY_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 15 matching lines @@
 struct CloudPrintProxyInfo;
 }  // namespace cloud_print
 
 // Layer between the browser user interface and the cloud print proxy code
 // running in the service process.
 class CloudPrintProxyService : public KeyedService {
  public:
   explicit CloudPrintProxyService(Profile* profile);
   virtual ~CloudPrintProxyService();
 
+  typedef base::Callback<void(const std::vector<std::string>&)>
+      PrintersCallback;
+
   // Initializes the object. This should be called every time an object of this
   // class is constructed.
   void Initialize();
 
+  // Returns list of printer names available for registration.
+  void GetPrinters(const PrintersCallback& callback);
+
   // Enables/disables cloud printing for the user
   virtual void EnableForUserWithRobot(
       const std::string& robot_auth_code,
       const std::string& robot_email,
       const std::string& user_email,
       const base::DictionaryValue& user_settings);
   virtual void DisableForUser();
 
   // Query the service process for the status of the cloud print proxy and
   // update the browser prefs.
   void RefreshStatusFromService();
 
   // Disable the service if the policy to do so is set, and once the
   // disablement is verified, quit the browser. Returns true if the policy is
   // not set or the connector was not enabled.
   bool EnforceCloudPrintConnectorPolicyAndQuit();
 
   std::string proxy_id() const { return proxy_id_; }
 
-  // Returns list of printer names available for registration.
-  static void GetPrintersAvalibleForRegistration(
-      std::vector<std::string>* printers);
-
  private:
   // NotificationDelegate implementation for the token expired notification.
   class TokenExpiredNotificationDelegate;
   friend class TokenExpiredNotificationDelegate;
 
   // Methods that send an IPC to the service.
+  void GetCloudPrintProxyPrinters(const PrintersCallback& callback);
   void RefreshCloudPrintProxyStatus();
   void EnableCloudPrintProxyWithRobot(
       const std::string& robot_auth_code,
       const std::string& robot_email,
       const std::string& user_email,
       const base::DictionaryValue* user_preferences);
   void DisableCloudPrintProxy();
 
   // Callback that gets the cloud print proxy info.
   void ProxyInfoCallback(
@@ skipping 20 matching lines @@
   PrefChangeRegistrar pref_change_registrar_;
 
   // If set, continue trying to disable the connector, and quit the process
   // once successful.
   bool enforcing_connector_policy_;
 
   DISALLOW_COPY_AND_ASSIGN(CloudPrintProxyService);
 };
 
 #endif  // CHROME_BROWSER_PRINTING_CLOUD_PRINT_CLOUD_PRINT_PROXY_SERVICE_H_