Nits for assist ranker.

Bug: 786472
Change-Id: I03a23cc70529ff2854ec538d6954411d6d89abdd
Reviewed-on: https://chromium-review.googlesource.com/830824
Commit-Queue: Philippe Hamel <hamelphi@chromium.org>
Reviewed-by: Roger McFarlane <rogerm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526722}

components/assist_ranker/base_predictor.cc

@@ -57,9 +57,8 @@ bool BasePredictor::IsReady() {
 void BasePredictor::LogFeatureToUkm(const std::string& feature_name,
                                     const Feature& feature,
                                     ukm::UkmEntryBuilder* ukm_builder) {
-  if (!ukm_builder) {
+  if (!ukm_builder)
     return;
-  }
 
   if (!base::ContainsKey(*config_.feature_whitelist, feature_name)) {
     DVLOG(1) << "Feature not whitelisted: " << feature_name;

components/assist_ranker/binary_classifier_predictor.cc

@@ -82,8 +82,8 @@ RankerModelStatus BinaryClassifierPredictor::ValidateModel(
 bool BinaryClassifierPredictor::Initialize() {
   if (ranker_model_->proto().model_case() ==
       RankerModelProto::kLogisticRegression) {
-    inference_module_.reset(new GenericLogisticRegressionInference(
-        ranker_model_->proto().logistic_regression()));
+    inference_module_ = std::make_unique<GenericLogisticRegressionInference>(
+        ranker_model_->proto().logistic_regression());
     return true;
   }