remove all search engines chrome
settings.SearchEnginesBrowserProxyImpl.prototype.getSearchEnginesList()
.then(function(val) {
val.others.sort(function(a, b) { return b.modelIndex - a.modelIndex; });
val.others.forEach(function(engine) {
settings.SearchEnginesBrowserProxyImpl.prototype.removeSearchEngine(engine.modelIndex);
});
});