[Sync] Move ModelType and related classes to 'syncer' namespace

sync/protocol/proto_value_conversions_unittest.cc

Index: sync/protocol/proto_value_conversions_unittest.cc
diff --git a/sync/protocol/proto_value_conversions_unittest.cc b/sync/protocol/proto_value_conversions_unittest.cc
index 173a1c0a9121323d9b55974b067fcb8fe4586586..096ec0fa4a477e4b7149a98a2fa8fb1377d225e4 100644
--- a/sync/protocol/proto_value_conversions_unittest.cc
+++ b/sync/protocol/proto_value_conversions_unittest.cc
@@ -47,7 +47,7 @@ TEST_F(ProtoValueConversionsTest, ProtoChangeCheck) {
   // If this number changes, that means we added or removed a data
   // type.  Don't forget to add a unit test for {New
   // type}SpecificsToValue below.
-  EXPECT_EQ(17, syncable::MODEL_TYPE_COUNT);
+  EXPECT_EQ(17, syncer::MODEL_TYPE_COUNT);
 
   // We'd also like to check if we changed any field in our messages.
   // However, that's hard to do: sizeof could work, but it's
@@ -183,7 +183,7 @@ TEST_F(ProtoValueConversionsTest, EntitySpecificsToValue) {
 #undef SET_FIELD
 
   scoped_ptr<DictionaryValue> value(EntitySpecificsToValue(specifics));
-  EXPECT_EQ(syncable::MODEL_TYPE_COUNT - syncable::FIRST_REAL_MODEL_TYPE,
+  EXPECT_EQ(syncer::MODEL_TYPE_COUNT - syncer::FIRST_REAL_MODEL_TYPE,
             static_cast<int>(value->size()));
 }