sync: add WIFI_CREDENTIALS protobuf, ModelType, and preference

sync/syncable/model_type.cc

Index: sync/syncable/model_type.cc
diff --git a/sync/syncable/model_type.cc b/sync/syncable/model_type.cc
index 59be6f2de881fca8262d026febacd9ecc03dae3e..e2573a778ff5fa12142fada9eb50b9405ae0e437 100644
--- a/sync/syncable/model_type.cc
+++ b/sync/syncable/model_type.cc
@@ -119,6 +119,9 @@ void AddDefaultFieldValue(ModelType datatype,
     case ARTICLES:
       specifics->mutable_article();
       break;
+    case WIFI_CREDENTIALS:
+      specifics->mutable_wifi_credential();
+      break;
     default:
       NOTREACHED() << "No known extension for model type.";
   }
@@ -196,6 +199,8 @@ int GetSpecificsFieldNumberFromModelType(ModelType model_type) {
       return sync_pb::EntitySpecifics::kManagedUserSharedSettingFieldNumber;
     case ARTICLES:
       return sync_pb::EntitySpecifics::kArticleFieldNumber;
+    case WIFI_CREDENTIALS:
+      return sync_pb::EntitySpecifics::kWifiCredentialFieldNumber;
     default:
       NOTREACHED() << "No known extension for model type.";
       return 0;
@@ -324,6 +329,9 @@ ModelType GetModelTypeFromSpecifics(const sync_pb::EntitySpecifics& specifics) {
   if (specifics.has_article())
     return ARTICLES;
 
+  if (specifics.has_wifi_credential())
+    return WIFI_CREDENTIALS;
+
   return UNSPECIFIED;
 }
 
@@ -356,6 +364,7 @@ ModelTypeSet UserSelectableTypes() {
   set.Put(TYPED_URLS);
   set.Put(EXTENSIONS);
   set.Put(APPS);
+  set.Put(WIFI_CREDENTIALS);
   set.Put(PROXY_TABS);
   return set;
 }
@@ -524,6 +533,8 @@ const char* ModelTypeToString(ModelType model_type) {
       return "Managed User Shared Settings";
     case ARTICLES:
       return "Articles";
+    case WIFI_CREDENTIALS:
+      return "WiFi Credentials";
     case PROXY_TABS:
       return "Tabs";
     default:
@@ -603,6 +614,8 @@ int ModelTypeToHistogramInt(ModelType model_type) {
       return 30;
     case SYNCED_NOTIFICATION_APP_INFO:
       return 31;
+    case WIFI_CREDENTIALS:
+      return 32;
     // Silence a compiler warning.
     case MODEL_TYPE_COUNT:
       return 0;
@@ -696,6 +709,8 @@ ModelType ModelTypeFromString(const std::string& model_type_string) {
     return SUPERVISED_USER_SHARED_SETTINGS;
   else if (model_type_string == "Articles")
     return ARTICLES;
+  else if (model_type_string == "WiFi Credentials")
+    return WIFI_CREDENTIALS;
   else if (model_type_string == "Tabs")
     return PROXY_TABS;
   else
@@ -820,6 +835,8 @@ std::string ModelTypeToRootTag(ModelType type) {
       return "google_chrome_managed_user_shared_settings";
     case ARTICLES:
       return "google_chrome_articles";
+    case WIFI_CREDENTIALS:
+      return "google_chrome_wifi_credentials";
     case PROXY_TABS:
       return std::string();
     default: