Simplify the user agent code some more since after r255534 it's not affected by the site's URL.

chrome/browser/invalidation/ticl_invalidation_service.cc

 // Copyright (c) 2013 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/invalidation/ticl_invalidation_service.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "chrome/browser/invalidation/gcm_invalidation_bridge.h"
 #include "chrome/browser/invalidation/invalidation_logger.h"
 #include "chrome/browser/invalidation/invalidation_service_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/about_signin_internals.h"
 #include "chrome/browser/signin/about_signin_internals_factory.h"
 #include "chrome/browser/signin/profile_oauth2_token_service.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
+#include "chrome/common/chrome_content_client.h"
 #include "google_apis/gaia/gaia_constants.h"
 #include "sync/notifier/gcm_network_channel_delegate.h"
 #include "sync/notifier/invalidation_util.h"
 #include "sync/notifier/invalidator.h"
 #include "sync/notifier/invalidator_state.h"
 #include "sync/notifier/non_blocking_invalidator.h"
 #include "sync/notifier/object_id_invalidation_map.h"
 
 static const char* kOAuth2Scopes[] = {
   GaiaConstants::kGoogleTalkOAuth2Scope
@@ skipping 341 matching lines @@
       return;
     }
   }
   invalidator_.reset(new syncer::NonBlockingInvalidator(
           network_channel_creator,
           invalidator_storage_->GetInvalidatorClientId(),
           invalidator_storage_->GetSavedInvalidations(),
           invalidator_storage_->GetBootstrapData(),
           syncer::WeakHandle<syncer::InvalidationStateTracker>(
               invalidator_storage_->AsWeakPtr()),
-          content::GetUserAgent(GURL()),
+          GetUserAgent(),
           profile_->GetRequestContext()));
 
   UpdateInvalidatorCredentials();
 
   invalidator_->RegisterHandler(this);
   invalidator_->UpdateRegisteredIds(
       this,
       invalidator_registrar_->GetAllRegisteredIds());
 }
 
@@ skipping 22 matching lines @@
   }
 
   // This service always expects to have a valid invalidator storage.
   // So we must not only clear the old one, but also start a new one.
   invalidator_storage_->Clear();
   invalidator_storage_.reset(new InvalidatorStorage(profile_->GetPrefs()));
   invalidator_storage_->SetInvalidatorClientId(GenerateInvalidatorClientId());
 }
 
 }  // namespace invalidation