Add DOM Distiller sync datatype.

This adds a new sync datatype for articles.

BUG=288015

Review URL: https://codereview.chromium.org/24109005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225613 0039d316-1c4b-4281-b951-d872f2087c98

22 files changed, 123 insertions, 6 deletions

diff --git a/chrome/browser/sync/glue/model_association_manager.cc b/chrome/browser/sync/glue/model_association_manager.cc
index dfb2ee20..1dbdc85 100644
--- a/chrome/browser/sync/glue/model_association_manager.cc
+++ b/chrome/browser/sync/glue/model_association_manager.cc
@@ -45,6 +45,7 @@ static const syncer::ModelType kStartOrder[] = {
   syncer::FAVICON_IMAGES,
   syncer::FAVICON_TRACKING,
   syncer::MANAGED_USER_SETTINGS,
+  syncer::ARTICLES,
   syncer::AUTOFILL,             // Non-UI thread datatypes.
   syncer::AUTOFILL_PROFILE,
   syncer::EXTENSION_SETTINGS,
diff --git a/chrome/browser/sync/profile_sync_components_factory_impl.cc b/chrome/browser/sync/profile_sync_components_factory_impl.cc
index b89217e..e734a1e 100644
--- a/chrome/browser/sync/profile_sync_components_factory_impl.cc
+++ b/chrome/browser/sync/profile_sync_components_factory_impl.cc
@@ -196,6 +196,11 @@ void ProfileSyncComponentsFactoryImpl::RegisterCommonDataTypes(
     pss->RegisterDataTypeController(
         new PasswordDataTypeController(this, profile_, pss));
   }
+  // Article sync is disabled by default.  Register only if explicitly enabled.
+  if (command_line_->HasSwitch(switches::kEnableSyncArticles)) {
+    pss->RegisterDataTypeController(
+        new UIDataTypeController(syncer::ARTICLES, this, profile_, pss));
+  }
 }
 
 void ProfileSyncComponentsFactoryImpl::RegisterDesktopDataTypes(
@@ -397,6 +402,9 @@ base::WeakPtr<syncer::SyncableService> ProfileSyncComponentsFactoryImpl::
       return ManagedUserSyncServiceFactory::GetForProfile(profile_)->
           AsWeakPtr();
 #endif
+    case syncer::ARTICLES:
+      // TODO(nyquist) Hook up real syncer::SyncableService API here.
+      return base::WeakPtr<syncer::SyncableService>();
     default:
       // The following datatypes still need to be transitioned to the
       // syncer::SyncableService API:
diff --git a/chrome/browser/sync/profile_sync_service.cc b/chrome/browser/sync/profile_sync_service.cc
index 38a4fee..cdcb655 100644
--- a/chrome/browser/sync/profile_sync_service.cc
+++ b/chrome/browser/sync/profile_sync_service.cc
@@ -1538,7 +1538,7 @@ const browser_sync::user_selectable_type::UserSelectableSyncType
     browser_sync::user_selectable_type::PROXY_TABS
   };
 
-  COMPILE_ASSERT(28 == syncer::MODEL_TYPE_COUNT, UpdateCustomConfigHistogram);
+  COMPILE_ASSERT(29 == syncer::MODEL_TYPE_COUNT, UpdateCustomConfigHistogram);
 
   if (!sync_everything) {
     const syncer::ModelTypeSet current_types = GetPreferredDataTypes();
diff --git a/chrome/browser/sync/sync_prefs.cc b/chrome/browser/sync/sync_prefs.cc
index a36d8b9..eeab7c3 100644
--- a/chrome/browser/sync/sync_prefs.cc
+++ b/chrome/browser/sync/sync_prefs.cc
@@ -127,6 +127,7 @@ void SyncPrefs::RegisterProfilePrefs(
   model_set.Put(syncer::APPS);
   model_set.Put(syncer::TYPED_URLS);
   model_set.Put(syncer::SESSIONS);
+  model_set.Put(syncer::ARTICLES);
   registry->RegisterListPref(prefs::kSyncAcknowledgedSyncTypes,
                              syncer::ModelTypeSetToValue(model_set),
                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
@@ -346,6 +347,8 @@ const char* SyncPrefs::GetPrefNameForDataType(syncer::ModelType data_type) {
       return prefs::kSyncPriorityPreferences;
     case syncer::MANAGED_USERS:
       return prefs::kSyncManagedUsers;
+    case syncer::ARTICLES:
+      return prefs::kSyncArticles;
     default:
       break;
   }
diff --git a/chrome/browser/sync/user_selectable_sync_type.h b/chrome/browser/sync/user_selectable_sync_type.h
index 141e72f..be854f0 100644
--- a/chrome/browser/sync/user_selectable_sync_type.h
+++ b/chrome/browser/sync/user_selectable_sync_type.h
@@ -50,6 +50,7 @@ enum UserSelectableSyncType {
   // HISTORY_DELETE_DIRECTIVES,
   // FAVICON_IMAGES,
   // FAVICON_TRACKING,
+  // ARTICLE,
 
   // Number of sync datatypes exposed to the user via checboxes in the UI.
   SELECTABLE_DATATYPE_COUNT = 10,
diff --git a/chrome/browser/ui/webui/sync_setup_handler.cc b/chrome/browser/ui/webui/sync_setup_handler.cc
index 1a7b7c1..7602d1e 100644
--- a/chrome/browser/ui/webui/sync_setup_handler.cc
+++ b/chrome/browser/ui/webui/sync_setup_handler.cc
@@ -94,7 +94,7 @@ const char* kDataTypeNames[] = {
   "tabs"
 };
 
-COMPILE_ASSERT(28 == syncer::MODEL_TYPE_COUNT,
+COMPILE_ASSERT(29 == syncer::MODEL_TYPE_COUNT,
                update_kDataTypeNames_to_match_UserSelectableTypes);
 
 typedef std::map<syncer::ModelType, const char*> ModelTypeNameMap;
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index d7a930c..95b5a66 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -756,6 +756,9 @@ const char kEnableSuggestionsTabPage[]      = "enable-suggestions-ntp";
 const char kEnableSyncSyncedNotifications[] =
     "enable-sync-synced-notifications";
 
+// Enables synced articles.
+const char kEnableSyncArticles[] = "enable-sync-articles";
+
 // Enables context menu for selecting groups of tabs.
 const char kEnableTabGroupsContextMenu[]    = "enable-tab-groups-context-menu";
 
diff --git a/chrome/common/chrome_switches.h b/chrome/common/chrome_switches.h
index e6dcc08..c36c9f7 100644
--- a/chrome/common/chrome_switches.h
+++ b/chrome/common/chrome_switches.h
@@ -214,6 +214,7 @@ extern const char kEnableSpellingAutoCorrect[];
 extern const char kEnableSpellingServiceFeedback[];
 extern const char kEnableStackedTabStrip[];
 extern const char kEnableSuggestionsTabPage[];
+extern const char kEnableSyncArticles[];
 extern const char kEnableSyncSyncedNotifications[];
 extern const char kEnableTabGroupsContextMenu[];
 extern const char kEnableThumbnailRetargeting[];
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 1ff7bde..96db122 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1782,6 +1782,7 @@ const char kSyncFaviconTracking[] = "sync.favicon_tracking";
 const char kSyncHistoryDeleteDirectives[] = "sync.history_delete_directives";
 const char kSyncManagedUserSettings[] = "sync.managed_user_settings";
 const char kSyncManagedUsers[] = "sync.managed_users";
+const char kSyncArticles[] = "sync.articles";
 const char kSyncPasswords[] = "sync.passwords";
 const char kSyncPreferences[] = "sync.preferences";
 const char kSyncPriorityPreferences[] = "sync.priority_preferences";
diff --git a/chrome/common/pref_names.h b/chrome/common/pref_names.h
index 3aa63fb..17819984 100644
--- a/chrome/common/pref_names.h
+++ b/chrome/common/pref_names.h
@@ -624,6 +624,7 @@ extern const char kSyncFaviconTracking[];
 extern const char kSyncHistoryDeleteDirectives[];
 extern const char kSyncManagedUserSettings[];
 extern const char kSyncManagedUsers[];
+extern const char kSyncArticles[];
 extern const char kSyncPasswords[];
 extern const char kSyncPreferences[];
 extern const char kSyncPriorityPreferences[];
diff --git a/sync/internal_api/public/base/model_type.h b/sync/internal_api/public/base/model_type.h
index 247d351..4f512b4 100644
--- a/sync/internal_api/public/base/model_type.h
+++ b/sync/internal_api/public/base/model_type.h
@@ -99,6 +99,8 @@ enum ModelType {
   // by this user and can have restrictions applied. MANAGED_USERS and
   // MANAGED_USER_SETTINGS can not be encrypted.
   MANAGED_USERS,
+  // Distilled articles.
+  ARTICLES,
 
   // ---- Proxy types ----
   // Proxy types are excluded from the sync protocol, but are still considered
diff --git a/sync/protocol/article_specifics.proto b/sync/protocol/article_specifics.proto
new file mode 100644
index 0000000..00631fd
--- /dev/null
+++ b/sync/protocol/article_specifics.proto
@@ -0,0 +1,29 @@
+// Copyright 2013 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.
+//
+// Sync protocol datatype extension for the article.
+
+syntax = "proto2";
+
+option optimize_for = LITE_RUNTIME;
+option retain_unknown_fields = true;
+
+package sync_pb;
+
+// Properties of Article objects.
+message ArticleSpecifics {
+  // Next ID to use: 4
+
+  optional string entry_id = 1;
+
+  optional string title = 2;
+
+  repeated ArticlePage pages = 3;
+}
+
+message ArticlePage {
+  // Next ID to use: 2
+
+  optional string url = 1;
+}
diff --git a/sync/protocol/nigori_specifics.proto b/sync/protocol/nigori_specifics.proto
index 6e72ae14..662b94a 100644
--- a/sync/protocol/nigori_specifics.proto
+++ b/sync/protocol/nigori_specifics.proto
@@ -120,5 +120,8 @@ message NigoriSpecifics {
   // Boolean corresponding to Whether to encrypt favicons data or not.
   optional bool encrypt_favicon_images = 35;
   optional bool encrypt_favicon_tracking = 36;
+
+  // Boolean corresponding to whether articles should be encrypted.
+  optional bool encrypt_articles = 37;
 }
 
diff --git a/sync/protocol/proto_value_conversions.cc b/sync/protocol/proto_value_conversions.cc
index 245f6b4..1f5a726 100644
--- a/sync/protocol/proto_value_conversions.cc
+++ b/sync/protocol/proto_value_conversions.cc
@@ -564,6 +564,7 @@ base::DictionaryValue* NigoriSpecificsToValue(
   SET_BOOL(encrypt_apps);
   SET_BOOL(encrypt_search_engines);
   SET_BOOL(encrypt_dictionary);
+  SET_BOOL(encrypt_articles);
   SET_BOOL(encrypt_everything);
   SET_BOOL(sync_tab_favicons);
   SET_ENUM(passphrase_type, PassphraseTypeString);
@@ -573,6 +574,22 @@ base::DictionaryValue* NigoriSpecificsToValue(
   return value;
 }
 
+base::DictionaryValue* ArticlePageToValue(
+    const sync_pb::ArticlePage& proto) {
+  base::DictionaryValue* value = new base::DictionaryValue();
+  SET_STR(url);
+  return value;
+}
+
+base::DictionaryValue* ArticleSpecificsToValue(
+    const sync_pb::ArticleSpecifics& proto) {
+  base::DictionaryValue* value = new base::DictionaryValue();
+  SET_STR(entry_id);
+  SET_STR(title);
+  SET_REP(pages, ArticlePageToValue);
+  return value;
+}
+
 base::DictionaryValue* PasswordSpecificsToValue(
     const sync_pb::PasswordSpecifics& proto) {
   base::DictionaryValue* value = new base::DictionaryValue();
@@ -672,6 +689,7 @@ base::DictionaryValue* EntitySpecificsToValue(
   SET_FIELD(app, AppSpecificsToValue);
   SET_FIELD(app_notification, AppNotificationToValue);
   SET_FIELD(app_setting, AppSettingSpecificsToValue);
+  SET_FIELD(article, ArticleSpecificsToValue);
   SET_FIELD(autofill, AutofillSpecificsToValue);
   SET_FIELD(autofill_profile, AutofillProfileSpecificsToValue);
   SET_FIELD(bookmark, BookmarkSpecificsToValue);
diff --git a/sync/protocol/proto_value_conversions.h b/sync/protocol/proto_value_conversions.h
index c7c6cef..ee40e2b 100644
--- a/sync/protocol/proto_value_conversions.h
+++ b/sync/protocol/proto_value_conversions.h
@@ -18,6 +18,7 @@ class AppNotification;
 class AppNotificationSettings;
 class AppSettingSpecifics;
 class AppSpecifics;
+class ArticleSpecifics;
 class AutofillProfileSpecifics;
 class AutofillSpecifics;
 class BookmarkSpecifics;
@@ -178,6 +179,9 @@ base::DictionaryValue* AppSettingSpecificsToValue(
 SYNC_EXPORT_PRIVATE base::DictionaryValue* AppSpecificsToValue(
     const sync_pb::AppSpecifics& app_specifics);
 
+SYNC_EXPORT_PRIVATE base::DictionaryValue* ArticleSpecificsToValue(
+    const sync_pb::ArticleSpecifics& article_specifics);
+
 SYNC_EXPORT_PRIVATE base::DictionaryValue* AutofillSpecificsToValue(
     const sync_pb::AutofillSpecifics& autofill_specifics);
 
diff --git a/sync/protocol/proto_value_conversions_unittest.cc b/sync/protocol/proto_value_conversions_unittest.cc
index 718a78a..3275eb0 100644
--- a/sync/protocol/proto_value_conversions_unittest.cc
+++ b/sync/protocol/proto_value_conversions_unittest.cc
@@ -53,7 +53,7 @@ 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(28, MODEL_TYPE_COUNT);
+  EXPECT_EQ(29, 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
@@ -219,6 +219,10 @@ TEST_F(ProtoValueConversionsTest, DictionarySpecificsToValue) {
   TestSpecificsToValue(DictionarySpecificsToValue);
 }
 
+TEST_F(ProtoValueConversionsTest, ArticleSpecificsToValue) {
+  TestSpecificsToValue(ArticleSpecificsToValue);
+}
+
 // TODO(akalin): Figure out how to better test EntitySpecificsToValue.
 
 TEST_F(ProtoValueConversionsTest, EntitySpecificsToValue) {
@@ -230,6 +234,7 @@ TEST_F(ProtoValueConversionsTest, EntitySpecificsToValue) {
   SET_FIELD(app);
   SET_FIELD(app_notification);
   SET_FIELD(app_setting);
+  SET_FIELD(article);
   SET_FIELD(autofill);
   SET_FIELD(autofill_profile);
   SET_FIELD(bookmark);
diff --git a/sync/protocol/sync.proto b/sync/protocol/sync.proto
index 445fa41..5b0c175 100644
--- a/sync/protocol/sync.proto
+++ b/sync/protocol/sync.proto
@@ -17,6 +17,7 @@ package sync_pb;
 import "app_notification_specifics.proto";
 import "app_setting_specifics.proto";
 import "app_specifics.proto";
+import "article_specifics.proto";
 import "autofill_specifics.proto";
 import "bookmark_specifics.proto";
 import "client_commands.proto";
@@ -118,6 +119,7 @@ message EntitySpecifics {
   optional FaviconImageSpecifics favicon_image = 182019;
   optional ManagedUserSettingSpecifics managed_user_setting = 186662;
   optional ManagedUserSpecifics managed_user = 194582;
+  optional ArticleSpecifics article = 223759;
 }
 
 message SyncEntity {
diff --git a/sync/sync_proto.gypi b/sync/sync_proto.gypi
index bb79b4b..4b90525 100644
--- a/sync/sync_proto.gypi
+++ b/sync/sync_proto.gypi
@@ -13,6 +13,7 @@
     'protocol/app_notification_specifics.proto',
     'protocol/app_setting_specifics.proto',
     'protocol/app_specifics.proto',
+    'protocol/article_specifics.proto',
     'protocol/autofill_specifics.proto',
     'protocol/bookmark_specifics.proto',
     'protocol/client_commands.proto',
diff --git a/sync/syncable/model_type.cc b/sync/syncable/model_type.cc
index b9dacbe..3576413 100644
--- a/sync/syncable/model_type.cc
+++ b/sync/syncable/model_type.cc
@@ -107,6 +107,9 @@ void AddDefaultFieldValue(ModelType datatype,
     case MANAGED_USERS:
       specifics->mutable_managed_user();
       break;
+    case ARTICLES:
+      specifics->mutable_article();
+      break;
     default:
       NOTREACHED() << "No known extension for model type.";
   }
@@ -197,6 +200,8 @@ int GetSpecificsFieldNumberFromModelType(ModelType model_type) {
       return sync_pb::EntitySpecifics::kManagedUserSettingFieldNumber;
     case MANAGED_USERS:
       return sync_pb::EntitySpecifics::kManagedUserFieldNumber;
+    case ARTICLES:
+      return sync_pb::EntitySpecifics::kArticleFieldNumber;
     default:
       NOTREACHED() << "No known extension for model type.";
       return 0;
@@ -319,6 +324,9 @@ ModelType GetModelTypeFromSpecifics(const sync_pb::EntitySpecifics& specifics) {
   if (specifics.has_managed_user())
     return MANAGED_USERS;
 
+  if (specifics.has_article())
+    return ARTICLES;
+
   return UNSPECIFIED;
 }
 
@@ -484,6 +492,8 @@ const char* ModelTypeToString(ModelType model_type) {
       return "Managed User Settings";
     case MANAGED_USERS:
       return "Managed Users";
+    case ARTICLES:
+      return "Articles";
     case PROXY_TABS:
       return "Tabs";
     default:
@@ -555,6 +565,8 @@ int ModelTypeToHistogramInt(ModelType model_type) {
       return 26;
     case MANAGED_USERS:
       return 27;
+    case ARTICLES:
+      return 28;
     // Silence a compiler warning.
     case MODEL_TYPE_COUNT:
       return 0;
@@ -640,6 +652,8 @@ ModelType ModelTypeFromString(const std::string& model_type_string) {
     return MANAGED_USER_SETTINGS;
   else if (model_type_string == "Managed Users")
     return MANAGED_USERS;
+  else if (model_type_string == "Articles")
+    return ARTICLES;
   else if (model_type_string == "Tabs")
     return PROXY_TABS;
   else
@@ -732,6 +746,8 @@ std::string ModelTypeToRootTag(ModelType type) {
       return "google_chrome_managed_user_settings";
     case MANAGED_USERS:
       return "google_chrome_managed_users";
+    case ARTICLES:
+      return "google_chrome_articles";
     case PROXY_TABS:
       return std::string();
     default:
@@ -771,6 +787,7 @@ const char kFaviconImageNotificationType[] = "FAVICON_IMAGE";
 const char kFaviconTrackingNotificationType[] = "FAVICON_TRACKING";
 const char kManagedUserSettingNotificationType[] = "MANAGED_USER_SETTING";
 const char kManagedUserNotificationType[] = "MANAGED_USER";
+const char kArticleNotificationType[] = "ARTICLE";
 }  // namespace
 
 bool RealModelTypeToNotificationType(ModelType model_type,
@@ -851,6 +868,9 @@ bool RealModelTypeToNotificationType(ModelType model_type,
     case MANAGED_USERS:
       *notification_type = kManagedUserNotificationType;
       return true;
+    case ARTICLES:
+      *notification_type = kArticleNotificationType;
+      return true;
     default:
       break;
   }
@@ -935,6 +955,9 @@ bool NotificationTypeToRealModelType(const std::string& notification_type,
   } else if (notification_type == kManagedUserNotificationType) {
     *model_type = MANAGED_USERS;
     return true;
+  } else if (notification_type == kArticleNotificationType) {
+    *model_type = ARTICLES;
+    return true;
   }
   *model_type = UNSPECIFIED;
   return false;
diff --git a/sync/syncable/nigori_util.cc b/sync/syncable/nigori_util.cc
index 9100e9d..fbdd9a5 100644
--- a/sync/syncable/nigori_util.cc
+++ b/sync/syncable/nigori_util.cc
@@ -242,7 +242,7 @@ void UpdateNigoriFromEncryptedTypes(ModelTypeSet encrypted_types,
                                     bool encrypt_everything,
                                     sync_pb::NigoriSpecifics* nigori) {
   nigori->set_encrypt_everything(encrypt_everything);
-  COMPILE_ASSERT(28 == MODEL_TYPE_COUNT, UpdateEncryptedTypes);
+  COMPILE_ASSERT(29 == MODEL_TYPE_COUNT, UpdateEncryptedTypes);
   nigori->set_encrypt_bookmarks(
       encrypted_types.Has(BOOKMARKS));
   nigori->set_encrypt_preferences(
@@ -268,6 +268,7 @@ void UpdateNigoriFromEncryptedTypes(ModelTypeSet encrypted_types,
   nigori->set_encrypt_dictionary(encrypted_types.Has(DICTIONARY));
   nigori->set_encrypt_favicon_images(encrypted_types.Has(FAVICON_IMAGES));
   nigori->set_encrypt_favicon_tracking(encrypted_types.Has(FAVICON_TRACKING));
+  nigori->set_encrypt_articles(encrypted_types.Has(ARTICLES));
 }
 
 ModelTypeSet GetEncryptedTypesFromNigori(
@@ -276,7 +277,7 @@ ModelTypeSet GetEncryptedTypesFromNigori(
     return ModelTypeSet::All();
 
   ModelTypeSet encrypted_types;
-  COMPILE_ASSERT(28 == MODEL_TYPE_COUNT, UpdateEncryptedTypes);
+  COMPILE_ASSERT(29 == MODEL_TYPE_COUNT, UpdateEncryptedTypes);
   if (nigori.encrypt_bookmarks())
     encrypted_types.Put(BOOKMARKS);
   if (nigori.encrypt_preferences())
@@ -309,6 +310,8 @@ ModelTypeSet GetEncryptedTypesFromNigori(
     encrypted_types.Put(FAVICON_IMAGES);
   if (nigori.encrypt_favicon_tracking())
     encrypted_types.Put(FAVICON_TRACKING);
+  if (nigori.encrypt_articles())
+    encrypted_types.Put(ARTICLES);
   return encrypted_types;
 }
 
diff --git a/sync/tools/testserver/chromiumsync.py b/sync/tools/testserver/chromiumsync.py
index b95c6be..d807486 100644
--- a/sync/tools/testserver/chromiumsync.py
+++ b/sync/tools/testserver/chromiumsync.py
@@ -22,6 +22,7 @@ import urlparse
 import app_notification_specifics_pb2
 import app_setting_specifics_pb2
 import app_specifics_pb2
+import article_specifics_pb2
 import autofill_specifics_pb2
 import bookmark_specifics_pb2
 import dictionary_specifics_pb2
@@ -54,6 +55,7 @@ ALL_TYPES = (
     APPS,
     APP_NOTIFICATION,
     APP_SETTINGS,
+    ARTICLE,
     AUTOFILL,
     AUTOFILL_PROFILE,
     BOOKMARK,
@@ -75,7 +77,7 @@ ALL_TYPES = (
     TYPED_URL,
     EXTENSION_SETTINGS,
     FAVICON_IMAGES,
-    FAVICON_TRACKING) = range(26)
+    FAVICON_TRACKING) = range(27)
 
 # An enumeration on the frequency at which the server should send errors
 # to the client. This would be specified by the url that triggers the error.
@@ -95,6 +97,7 @@ SYNC_TYPE_TO_DESCRIPTOR = {
     APP_NOTIFICATION: SYNC_TYPE_FIELDS['app_notification'],
     APP_SETTINGS: SYNC_TYPE_FIELDS['app_setting'],
     APPS: SYNC_TYPE_FIELDS['app'],
+    ARTICLE: SYNC_TYPE_FIELDS['article'],
     AUTOFILL: SYNC_TYPE_FIELDS['autofill'],
     AUTOFILL_PROFILE: SYNC_TYPE_FIELDS['autofill_profile'],
     BOOKMARK: SYNC_TYPE_FIELDS['bookmark'],
@@ -530,6 +533,8 @@ class SyncDataModel(object):
                     parent_tag=ROOT_ID, sync_type=TYPED_URL),
       PermanentItem('google_chrome_dictionary', name='Dictionary',
                     parent_tag=ROOT_ID, sync_type=DICTIONARY),
+      PermanentItem('google_chrome_articles', name='Articles',
+                    parent_tag=ROOT_ID, sync_type=ARTICLE),
       ]
 
   def __init__(self):
diff --git a/sync/util/data_type_histogram.h b/sync/util/data_type_histogram.h
index 5c8e840..01a2ba0 100644
--- a/sync/util/data_type_histogram.h
+++ b/sync/util/data_type_histogram.h
@@ -111,6 +111,9 @@
       case ::syncer::MANAGED_USERS: \
         PER_DATA_TYPE_MACRO("ManagedUser"); \
         break; \
+      case ::syncer::ARTICLES: \
+        PER_DATA_TYPE_MACRO("Article"); \
+        break; \
       case ::syncer::PROXY_TABS: \
         PER_DATA_TYPE_MACRO("Tabs"); \
         break; \