Simplify TranslateRanker API.

components/translate/core/browser/translate_ranker_impl.h

Index: components/translate/core/browser/translate_ranker_impl.h
diff --git a/components/translate/core/browser/translate_ranker_impl.h b/components/translate/core/browser/translate_ranker_impl.h
index fa3eb4b3936f215a1e6946ce71b15fcc7bec7c55..abbed4d50c1a67b987836d59f72f97ef16ae8ec0 100644
--- a/components/translate/core/browser/translate_ranker_impl.h
+++ b/components/translate/core/browser/translate_ranker_impl.h
@@ -34,8 +34,6 @@ class TranslateEventProto;
 
 namespace translate {
 
-class TranslatePrefs;
-
 // Features used to enable ranker query, enforcement and logging. Note that
 // enabling enforcement implies (forces) enabling queries.
 extern const base::Feature kTranslateRankerQuery;
@@ -53,10 +51,7 @@ struct TranslateRankerFeatures {
                           const std::string& cntry,
                           const std::string& locale);
 
-  TranslateRankerFeatures(const TranslatePrefs& prefs,
-                          const std::string& src,
-                          const std::string& dst,
-                          const std::string& locale);
+  TranslateRankerFeatures(const metrics::TranslateEventProto& tep);
 
   ~TranslateRankerFeatures();
 
@@ -101,9 +96,6 @@ class TranslateRankerImpl : public TranslateRanker {
   // TranslateRanker...
   uint32_t GetModelVersion() const override;
   bool ShouldOfferTranslation(
-      const TranslatePrefs& translate_prefs,
-      const std::string& src_lang,
-      const std::string& dst_lang,
       metrics::TranslateEventProto* translate_event) override;
   void FlushTranslateEvents(
       std::vector<metrics::TranslateEventProto>* events) override;
@@ -120,8 +112,8 @@ class TranslateRankerImpl : public TranslateRanker {
       std::unique_ptr<chrome_intelligence::RankerModel> model);
 
   // Get the model decision on whether we should show the translate
-  // UI or not given |features|.
-  bool GetModelDecision(const TranslateRankerFeatures& features);
+  // UI or not given |translate_event|.
+  bool GetModelDecision(const metrics::TranslateEventProto& translate_event);
 
   // Check if the ModelLoader has been initialized. Used to test ModelLoader
   // logic.