Add PrinterSpecifics to the sync protos.

components/sync/protocol/proto_value_conversions_unittest.cc

Index: components/sync/protocol/proto_value_conversions_unittest.cc
diff --git a/components/sync/protocol/proto_value_conversions_unittest.cc b/components/sync/protocol/proto_value_conversions_unittest.cc
index 3d4d5704ffaf93b3075304bbc3ff68c4345caf0d..b01f8e565d1cfb2a4cb20737828713fb969cf5f6 100644
--- a/components/sync/protocol/proto_value_conversions_unittest.cc
+++ b/components/sync/protocol/proto_value_conversions_unittest.cc
@@ -60,7 +60,7 @@ 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(37, MODEL_TYPE_COUNT);
+  EXPECT_EQ(38, 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
@@ -258,6 +258,10 @@ TEST_F(ProtoValueConversionsTest, PreferenceSpecificsToValue) {
   TestSpecificsToValue(PreferenceSpecificsToValue);
 }
 
+TEST_F(ProtoValueConversionsTest, PrintersSpecificsToValue) {
+  TestSpecificsToValue(PrintersSpecificsToValue);
+}
+
 TEST_F(ProtoValueConversionsTest, SearchEngineSpecificsToValue) {
   TestSpecificsToValue(SearchEngineSpecificsToValue);
 }
@@ -326,6 +330,7 @@ TEST_F(ProtoValueConversionsTest, EntitySpecificsToValue) {
   SET_FIELD(nigori);
   SET_FIELD(password);
   SET_FIELD(preference);
+  SET_FIELD(printers);
   SET_FIELD(priority_preference);
   SET_FIELD(search_engine);
   SET_FIELD(session);