[Sync] Move ChangeRecord into its own file (change_record.{h,cc})

chrome/browser/sync/abstract_profile_sync_service_test.h

Index: chrome/browser/sync/abstract_profile_sync_service_test.h
diff --git a/chrome/browser/sync/abstract_profile_sync_service_test.h b/chrome/browser/sync/abstract_profile_sync_service_test.h
index 4c6636950d4d4055221466a6a9c892bda498da6f..adca9581b60b3073afb91c303dfff9b5c8e2567d 100644
--- a/chrome/browser/sync/abstract_profile_sync_service_test.h
+++ b/chrome/browser/sync/abstract_profile_sync_service_test.h
@@ -12,6 +12,7 @@
 #include "base/message_loop.h"
 #include "base/task.h"
 #include "chrome/browser/net/gaia/token_service.h"
+#include "chrome/browser/sync/internal_api/change_record.h"
 #include "chrome/browser/sync/profile_sync_factory_mock.h"
 #include "chrome/browser/sync/syncable/model_type.h"
 #include "content/browser/browser_thread.h"
@@ -35,6 +36,9 @@ class ProfileSyncServiceTestHelper {
   static bool CreateRoot(syncable::ModelType model_type,
                          sync_api::UserShare* service,
                          browser_sync::TestIdFactory* ids);
+
+  static sync_api::ImmutableChangeRecordList MakeSingletonChangeRecordList(
+      int64 node_id, sync_api::ChangeRecord::Action action);
 };
 
 class AbstractProfileSyncServiceTest : public testing::Test {