[Sync] Fix namespaces for the browser_sync component.

chrome/browser/app_controller_mac_unittest.mm

Index: chrome/browser/app_controller_mac_unittest.mm
diff --git a/chrome/browser/app_controller_mac_unittest.mm b/chrome/browser/app_controller_mac_unittest.mm
index 1143c93983a10f58398412059a6b7550fa2199cb..0539ea4ac52828aaeaa4a0ea2951a6fff76ac9df 100644
--- a/chrome/browser/app_controller_mac_unittest.mm
+++ b/chrome/browser/app_controller_mac_unittest.mm
@@ -124,7 +124,8 @@ TEST_F(AppControllerTest, TestSigninMenuItemNoErrors) {
       IDS_SYNC_MENU_SYNCED_LABEL, base::UTF8ToUTF16(username));
   SigninManager* signin = SigninManagerFactory::GetForProfile(profile_);
   signin->SetAuthenticatedAccountInfo(username, username);
-  ProfileSyncService* sync = ProfileSyncServiceFactory::GetForProfile(profile_);
+  browser_sync::ProfileSyncService* sync =
+      ProfileSyncServiceFactory::GetForProfile(profile_);
   sync->SetFirstSetupComplete();
   [AppController updateSigninItem:syncMenuItem
                        shouldShow:YES
@@ -144,7 +145,8 @@ TEST_F(AppControllerTest, TestSigninMenuItemAuthError) {
   std::string username = "foo@example.com";
   SigninManager* signin = SigninManagerFactory::GetForProfile(profile_);
   signin->SetAuthenticatedAccountInfo(username, username);
-  ProfileSyncService* sync = ProfileSyncServiceFactory::GetForProfile(profile_);
+  browser_sync::ProfileSyncService* sync =
+      ProfileSyncServiceFactory::GetForProfile(profile_);
   sync->SetFirstSetupComplete();
   // Force an auth error.
   FakeAuthStatusProvider provider(