Change ProfileDownloader to use AccountTrackerService.

components/signin/core/browser/account_tracker_service.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 COMPONENTS_SIGNIN_CORE_BROWSER_ACCOUNT_TRACKER_SERVICE_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_ACCOUNT_TRACKER_SERVICE_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 35 matching lines @@
     AccountInfo();
     ~AccountInfo();
 
     std::string account_id;  // The account ID used by OAuth2TokenService.
     std::string gaia;
     std::string email;
     std::string full_name;
     std::string given_name;
     std::string hosted_domain;
     std::string locale;
+    std::string picture_url;
     // TODO(rogerta): eventually this structure will include other information

[Mike Lerman, 2015/04/20 13:25:23]

Please update this TODO with the items that actually still need to be added (eg
services)

[anthonyvd, 2015/04/29 15:15:08]

Done.

     // about the account, like full name, profile picture URL, etc.
 
-    bool IsValid();
+    bool IsValid() const;
   };
 
   // Clients of AccountTrackerService can implement this interface and register
   // with AddObserver() to learn about account information changes.
   class Observer {
    public:
     virtual ~Observer() {}
     virtual void OnAccountUpdated(const AccountInfo& info) {}
     virtual void OnAccountUpdateFailed(const std::string& account_id) {}
     virtual void OnAccountRemoved(const AccountInfo& info) {}
@@ skipping 104 matching lines @@
   std::list<std::string> pending_user_info_fetches_;
 
   // Holds references to refresh token annotation requests keyed by account_id.
   base::ScopedPtrHashMap<std::string, RefreshTokenAnnotationRequest>
       refresh_token_annotation_requests_;
 
   DISALLOW_COPY_AND_ASSIGN(AccountTrackerService);
 };
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_ACCOUNT_TRACKER_SERVICE_H_