[cros] Initial user image loading and repeated profile image loading fixes.

chrome/browser/chromeos/login/profile_image_downloader.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/chromeos/login/profile_image_downloader.h"
 
 #include <string>
 #include <vector>
 
 #include "base/json/json_reader.h"
@@ skipping 149 matching lines @@
 }
 
 ProfileImageDownloader::ProfileImageDownloader(Delegate* delegate)
     : delegate_(delegate) {
 }
 
 void ProfileImageDownloader::Start() {
   VLOG(1) << "Starting profile image downloader...";
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
-  // TODO(ivankr): ignore further Start() calls.
-
   TokenService* service =
       ProfileManager::GetDefaultProfile()->GetTokenService();
   if (!service) {
     // This can happen in some test paths.
     LOG(WARNING) << "User has no token service";
     if (delegate_)
       delegate_->OnDownloadFailure();
     return;
   }
   if (service->HasTokenForService(GaiaConstants::kPicasaService)) {
     auth_token_ =
         service->GetTokenForService(GaiaConstants::kPicasaService);
     StartFetchingImage();
-  } else if (registrar_.IsEmpty()) {
+  } else {
     registrar_.Add(this,
                    chrome::NOTIFICATION_TOKEN_AVAILABLE,
                    content::Source<TokenService>(service));
     registrar_.Add(this,
                    chrome::NOTIFICATION_TOKEN_REQUEST_FAILED,
                    content::Source<TokenService>(service));
   }
 }
 
 void ProfileImageDownloader::StartFetchingImage() {
@@ skipping 94 matching lines @@
   } else {
     if (token_details->service() == GaiaConstants::kPicasaService) {
       LOG(WARNING) << "ProfileImageDownloader: token request failed";
       if (delegate_)
         delegate_->OnDownloadFailure();
     }
   }
 }
 
 }  // namespace chromeos