Allow TranslateRanker to override decisions taken by heuristics.

components/translate/core/browser/translate_ranker.h

Index: components/translate/core/browser/translate_ranker.h
diff --git a/components/translate/core/browser/translate_ranker.h b/components/translate/core/browser/translate_ranker.h
index d8ed8ab3cc1db4e982bfbfe96e98e11631b2f54b..c190d15d25ef4e12363c9aaa2ba78017545b0235 100644
--- a/components/translate/core/browser/translate_ranker.h
+++ b/components/translate/core/browser/translate_ranker.h
@@ -26,10 +26,12 @@ class TranslatePrefs;
 class TranslateURLFetcher;
 
 // Features used to enable ranker query, enforcement and logging. Note that
-// enabling enforcement implies (forces) enabling queries.
+// enabling enforcement implies (forces) enabling queries. Enabling
+// DecisionOverride implies enabling Enforcement.
 extern const base::Feature kTranslateRankerQuery;
 extern const base::Feature kTranslateRankerEnforcement;
 extern const base::Feature kTranslateRankerLogging;
+extern const base::Feature kTranslateRankerDecisionOverride;
 
 // If enabled, downloads a translate ranker model and uses it to determine
 // whether the user should be given a translation prompt or not.
@@ -49,6 +51,9 @@ class TranslateRanker {
   // Returns true if enforcement is enabled.
   static bool IsEnforcementEnabled();
 
+  // Returns true if heuristic decisions should be overriden.
+  static bool IsDecisionOverrideEnabled();
+
   // Returns the singleton TranslateRanker instance.
   static TranslateRanker* GetInstance();