Clean up remaining unused globals (on mac).

sync/engine/syncer_unittest.cc

 // Copyright 2012 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.
 //
 // Syncer unit tests. Unfortunately a lot of these tests
 // are outdated and need to be reworked and updated.
 
 #include <algorithm>
 #include <limits>
 #include <list>
@@ skipping 3231 matching lines @@
     syncable::ReadTransaction rtrans(FROM_HERE, directory());
     Entry good_entry(&rtrans, syncable::GET_BY_ID, ids_.FromNumber(1));
     ASSERT_TRUE(good_entry.good());
     EXPECT_FALSE(good_entry.GetIsUnappliedUpdate());
     Entry bad_parent(&rtrans, syncable::GET_BY_ID, ids_.FromNumber(2));
     ASSERT_TRUE(bad_parent.good());
     EXPECT_TRUE(bad_parent.GetIsUnappliedUpdate());
   }
 }
 
-const char kRootId[] = "0";
-
 TEST_F(SyncerTest, DirectoryUpdateTest) {
   Id in_root_id = ids_.NewServerId();
   Id in_in_root_id = ids_.NewServerId();
 
   mock_server_->AddUpdateDirectory(in_root_id, TestIdFactory::root(),
                                    "in_root_name", 2, 2,
                                    foreign_cache_guid(), "-1");
   mock_server_->AddUpdateDirectory(in_in_root_id, in_root_id,
                                    "in_in_root_name", 3, 3,
                                    foreign_cache_guid(), "-2");
@@ skipping 1486 matching lines @@
     EXPECT_EQ("xyz", final_monitor_records["xyz"].extension_id);
     EXPECT_EQ(2049U, final_monitor_records["ABC"].bookmark_write_count);
     EXPECT_EQ(4U,    final_monitor_records["xyz"].bookmark_write_count);
   } else {
     EXPECT_TRUE(final_monitor_records.empty())
         << "Should not restore records after successful bookmark commit.";
   }
 }
 
 }  // namespace syncer