This CL replaces user_manager::UserID with AccountId.

chrome/browser/metrics/chromeos_metrics_provider_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/metrics/chromeos_metrics_provider.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "chrome/browser/chromeos/login/users/fake_chrome_user_manager.h"
@@ skipping 97 matching lines @@
   FakeBluetoothAdapterClient* fake_bluetooth_adapter_client_;
   FakeBluetoothDeviceClient* fake_bluetooth_device_client_;
 
  private:
   content::TestBrowserThreadBundle thread_bundle_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeOSMetricsProviderTest);
 };
 
 TEST_F(ChromeOSMetricsProviderTest, MultiProfileUserCount) {
-  std::string user1("user1@example.com");
-  std::string user2("user2@example.com");
-  std::string user3("user3@example.com");
+  const AccountId user1(AccountId::FromUserEmail("user1@example.com"));
+  const AccountId user2(AccountId::FromUserEmail("user2@example.com"));
+  const AccountId user3(AccountId::FromUserEmail("user3@example.com"));
 
   // |scoped_enabler| takes over the lifetime of |user_manager|.
   chromeos::FakeChromeUserManager* user_manager =
       new chromeos::FakeChromeUserManager();
   chromeos::ScopedUserManagerEnabler scoped_enabler(user_manager);
   user_manager->AddKioskAppUser(user1);
   user_manager->AddKioskAppUser(user2);
   user_manager->AddKioskAppUser(user3);
 
   user_manager->LoginUser(user1);
   user_manager->LoginUser(user3);
 
   ChromeOSMetricsProvider provider;
   provider.OnDidCreateMetricsLog();
   metrics::SystemProfileProto system_profile;
   provider.ProvideSystemProfileMetrics(&system_profile);
   EXPECT_EQ(2u, system_profile.multi_profile_user_count());
 }
 
 TEST_F(ChromeOSMetricsProviderTest, MultiProfileCountInvalidated) {
-  std::string user1("user1@example.com");
-  std::string user2("user2@example.com");
-  std::string user3("user3@example.com");
+  const AccountId user1(AccountId::FromUserEmail("user1@example.com"));
+  const AccountId user2(AccountId::FromUserEmail("user2@example.com"));
+  const AccountId user3(AccountId::FromUserEmail("user3@example.com"));
 
   // |scoped_enabler| takes over the lifetime of |user_manager|.
   chromeos::FakeChromeUserManager* user_manager =
       new chromeos::FakeChromeUserManager();
   chromeos::ScopedUserManagerEnabler scoped_enabler(user_manager);
   user_manager->AddKioskAppUser(user1);
   user_manager->AddKioskAppUser(user2);
   user_manager->AddKioskAppUser(user3);
 
   user_manager->LoginUser(user1);
@@ skipping 103 matching lines @@
   EXPECT_EQ(0x030DU, device1.product_id());
   EXPECT_EQ(0x0306U, device1.device_id());
 
   // The Confirm Passkey object, this has no Device ID information.
   EXPECT_EQ(FakeBluetoothDeviceClient::kConfirmPasskeyClass,
             device2.bluetooth_class());
   EXPECT_EQ(PairedDevice::DEVICE_PHONE, device2.type());
   EXPECT_EQ(0x207D74U, device2.vendor_prefix());
   EXPECT_EQ(PairedDevice::VENDOR_ID_UNKNOWN, device2.vendor_id_source());
 }