[Push] Use proper accessors for PushMessagingApplicationId.

chrome/browser/services/gcm/push_messaging_application_id_unittest.cc

 // 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.
 
 #include "chrome/browser/services/gcm/push_messaging_application_id.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace gcm {
 
 class PushMessagingApplicationIdTest : public testing::Test {
  protected:
   PushMessagingApplicationId GenerateId(
       const GURL& origin,
       int64 service_worker_registration_id) {
     // To bypass DCHECK in PushMessagingApplicationId::Generate, we just use it
     // to generate app_id_guid, and then use private constructor.
     std::string app_id_guid = gcm::PushMessagingApplicationId::Generate(
-        GURL("https://www.example.com/"), 1).app_id_guid;
+        GURL("https://www.example.com/"), 1).app_id_guid();
     return PushMessagingApplicationId(app_id_guid, origin,
                                       service_worker_registration_id);
   }
 };
 
 TEST_F(PushMessagingApplicationIdTest, ConstructorValidity) {
   EXPECT_TRUE(GenerateId(GURL("https://www.example.com/"), 1).IsValid());
   EXPECT_TRUE(GenerateId(GURL("https://www.example.com"), 1).IsValid());
   EXPECT_FALSE(GenerateId(GURL(""), 1).IsValid());
   EXPECT_FALSE(GenerateId(GURL("foo"), 1).IsValid());
   EXPECT_FALSE(GenerateId(GURL("https://www.example.com/foo"), 1).IsValid());
   EXPECT_FALSE(GenerateId(GURL("https://www.example.com/#foo"), 1).IsValid());
   EXPECT_FALSE(GenerateId(GURL("https://www.example.com/"), -1).IsValid());
 }
 
 TEST_F(PushMessagingApplicationIdTest, UniqueGuids) {
   EXPECT_NE(gcm::PushMessagingApplicationId::Generate(
-                GURL("https://www.example.com/"), 1).app_id_guid,
+                GURL("https://www.example.com/"), 1).app_id_guid(),
             gcm::PushMessagingApplicationId::Generate(
-                GURL("https://www.example.com/"), 1).app_id_guid);
+                GURL("https://www.example.com/"), 1).app_id_guid());
 }
 
 }  // namespace gcm