arc: Create sync protos for Arc package.

sync/syncable/model_type_unittest.cc

 // Copyright (c) 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.
 
 #include <memory>
 #include <string>
 
 #include "base/strings/string_util.h"
 #include "base/test/values_test_util.h"
 #include "base/values.h"
@@ skipping 51 matching lines @@
   EXPECT_EQ(model_types, ModelTypeSetFromValue(*value));
 }
 
 TEST_F(ModelTypeTest, IsRealDataType) {
   EXPECT_FALSE(IsRealDataType(UNSPECIFIED));
   EXPECT_FALSE(IsRealDataType(MODEL_TYPE_COUNT));
   EXPECT_FALSE(IsRealDataType(TOP_LEVEL_FOLDER));
   EXPECT_TRUE(IsRealDataType(FIRST_REAL_MODEL_TYPE));
   EXPECT_TRUE(IsRealDataType(BOOKMARKS));
   EXPECT_TRUE(IsRealDataType(APPS));
+  EXPECT_TRUE(IsRealDataType(ARC_PACKAGE));
 }
 
 TEST_F(ModelTypeTest, IsProxyType) {
   EXPECT_FALSE(IsProxyType(BOOKMARKS));
   EXPECT_FALSE(IsProxyType(MODEL_TYPE_COUNT));
   EXPECT_TRUE(IsProxyType(PROXY_TABS));
 }
 
 // Make sure we can convert ModelTypes to and from specifics field
 // numbers.
@@ skipping 101 matching lines @@
       EXPECT_EQ(notified_model_type, model_type);
     } else {
       EXPECT_FALSE(ProtocolTypes().Has(model_type));
       EXPECT_TRUE(notification_type.empty());
     }
   }
 }
 
 }  // namespace
 }  // namespace syncer