Allow TranslateRanker to override decisions taken by heuristics.

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 f2336331a3dbbffcef58c6e80211e8863acab637..1eaccdb2110a0e8b750fdda3fd904e894937efde 100644
--- a/components/translate/core/browser/translate_ranker_impl.h
+++ b/components/translate/core/browser/translate_ranker_impl.h
@@ -35,6 +35,7 @@ class TranslatePrefs;
 extern const base::Feature kTranslateRankerQuery;
 extern const base::Feature kTranslateRankerEnforcement;
 extern const base::Feature kTranslateRankerLogging;
+extern const base::Feature kTranslateRankerDecisionOverride;
 
 struct TranslateRankerFeatures {
   TranslateRankerFeatures();
@@ -94,6 +95,7 @@ class TranslateRankerImpl : public TranslateRanker {
   bool IsLoggingEnabled() override;
   bool IsQueryEnabled() override;
   bool IsEnforcementEnabled() override;
+  bool IsDecisionOverrideEnabled() override;
   int GetModelVersion() const override;
   bool ShouldOfferTranslation(const TranslatePrefs& translate_prefs,
                               const std::string& src_lang,
@@ -133,6 +135,12 @@ class TranslateRankerImpl : public TranslateRanker {
   // that also enables the code paths for translate ranker querying.
   bool is_enforcement_enabled_ = true;
 
+  // Tracks whether or not translate ranker decision override is enabled. This
+  // will override suppression heuristics and follow ranker's decision. Note
+  // that that also enables the code paths for translate ranker querying and
+  // enforcement.
+  bool is_decision_override_enabled_ = true;
+
   // Saved cache of translate event protos.
   std::vector<metrics::TranslateEventProto> event_cache_;