Enable sync for the settings from the Extension Settings API.

chrome/browser/extensions/test_extension_service.cc

Index: chrome/browser/extensions/test_extension_service.cc
diff --git a/chrome/browser/extensions/test_extension_service.cc b/chrome/browser/extensions/test_extension_service.cc
index 277e8ea0b9d79c09c8d686b59c84d618054d1f02..fd0f4506b5b55d830dd4272c8486ab73cfd4cc59 100644
--- a/chrome/browser/extensions/test_extension_service.cc
+++ b/chrome/browser/extensions/test_extension_service.cc
@@ -14,6 +14,16 @@ const ExtensionList* TestExtensionService::extensions() const {
   return NULL;
 }
 
+const ExtensionList* TestExtensionService::disabled_extensions() const {
+  ADD_FAILURE();
+  return NULL;
+}
+
+const ExtensionList* TestExtensionService::terminated_extensions() const {
+  ADD_FAILURE();
+  return NULL;
+}
+
 PendingExtensionManager* TestExtensionService::pending_extension_manager() {
   ADD_FAILURE();
   return NULL;