Allow TranslateRanker to override decisions taken by heuristics.

components/translate/core/browser/translate_ranker.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_RANKER_H_
 #define COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_RANKER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 17 matching lines @@
 
   // Returns true if translate events logging is enabled.
   virtual bool IsLoggingEnabled() = 0;
 
   // Returns true if enforcement is enabled.
   virtual bool IsEnforcementEnabled() = 0;
 
   // Returns true if querying is enabled.
   virtual bool IsQueryEnabled() = 0;
 
+  // Returns true if heuristic decisions should be overriden.
+  virtual bool IsDecisionOverrideEnabled() = 0;
+
   // Returns the version id for the ranker model.
   virtual int GetModelVersion() const = 0;
 
   // Returns true if executing the ranker model in the translation prompt
   // context described by |translate_prefs|, |src_lang|, |dst_lang| and possibly
   // other global browser context attributes suggests that the user should be
   // prompted as to whether translation should be performed.
   virtual bool ShouldOfferTranslation(const TranslatePrefs& translate_prefs,
                                       const std::string& src_lang,
                                       const std::string& dst_lang) = 0;
 
   // Caches the translate event.
   virtual void AddTranslateEvent(
       const metrics::TranslateEventProto& translate_event) = 0;
 
   // Transfers cached translate events to the given vector pointer and clears
   // the cache.
   virtual void FlushTranslateEvents(
       std::vector<metrics::TranslateEventProto>* events) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TranslateRanker);
 };
 
 }  // namespace translate
 
 #endif  // COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_RANKER_H_