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 ddde2041a98c1cb7c9a9fa13918b23ea29465996..e347804ecf633a7ff747699a0367075ef68dfc45 100644
--- a/sync/syncable/model_type.cc
+++ b/sync/syncable/model_type.cc
@@ -122,6 +122,9 @@ void AddDefaultFieldValue(ModelType datatype,
     case ENHANCED_BOOKMARKS:
       specifics->mutable_enhanced_bookmark();
       break;
+    case WIFI_CREDENTIALS:
+      specifics->mutable_wifi_credential();
+      break;
     default:
       NOTREACHED() << "No known extension for model type.";
   }
@@ -201,6 +204,8 @@ int GetSpecificsFieldNumberFromModelType(ModelType model_type) {
       return sync_pb::EntitySpecifics::kArticleFieldNumber;
     case ENHANCED_BOOKMARKS:
       return sync_pb::EntitySpecifics::kEnhancedBookmarkFieldNumber;
+    case WIFI_CREDENTIALS:
+      return sync_pb::EntitySpecifics::kWifiCredentialFieldNumber;
     default:
       NOTREACHED() << "No known extension for model type.";
       return 0;
@@ -332,6 +337,9 @@ ModelType GetModelTypeFromSpecifics(const sync_pb::EntitySpecifics& specifics) {
   if (specifics.has_enhanced_bookmark())
     return ENHANCED_BOOKMARKS;
 
+  if (specifics.has_wifi_credential())
+    return WIFI_CREDENTIALS;
+
   return UNSPECIFIED;
 }
 
@@ -364,6 +372,7 @@ ModelTypeSet UserSelectableTypes() {
   set.Put(TYPED_URLS);
   set.Put(EXTENSIONS);
   set.Put(APPS);
+  set.Put(WIFI_CREDENTIALS);
   set.Put(PROXY_TABS);
   return set;
 }
@@ -536,6 +545,8 @@ const char* ModelTypeToString(ModelType model_type) {
       return "Articles";
     case ENHANCED_BOOKMARKS:
       return "Enhanced Bookmarks";
+    case WIFI_CREDENTIALS:
+      return "WiFi Credentials";
     case PROXY_TABS:
       return "Tabs";
     default:
@@ -617,6 +628,8 @@ int ModelTypeToHistogramInt(ModelType model_type) {
       return 31;
     case ENHANCED_BOOKMARKS:
       return 32;
+    case WIFI_CREDENTIALS:
+      return 33;
     // Silence a compiler warning.
     case MODEL_TYPE_COUNT:
       return 0;
@@ -710,6 +723,8 @@ 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 if (model_type_string == "Enhanced Bookmarks")
@@ -836,6 +851,8 @@ 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();
     case ENHANCED_BOOKMARKS: