Simplify TranslateRanker API.

components/translate/core/browser/mock_translate_ranker.h

Index: components/translate/core/browser/mock_translate_ranker.h
diff --git a/components/translate/core/browser/mock_translate_ranker.h b/components/translate/core/browser/mock_translate_ranker.h
index f2e9d446649fdc66b4ca7e9ce6a3d693842a75cb..51dae4f19db8be1d48146f9ee78c1fe91e946ddb 100644
--- a/components/translate/core/browser/mock_translate_ranker.h
+++ b/components/translate/core/browser/mock_translate_ranker.h
@@ -20,8 +20,6 @@ class TranslateEventProto;
 
 namespace translate {
 
-class TranslatePrefs;
-
 namespace testing {
 
 class MockTranslateRanker : public TranslateRanker {
@@ -43,9 +41,6 @@ class MockTranslateRanker : public TranslateRanker {
   // TranslateRanker Implementation:
   uint32_t GetModelVersion() const override;
   bool ShouldOfferTranslation(
-      const TranslatePrefs& translate_prefs,
-      const std::string& src_lang,
-      const std::string& dst_lang,
       metrics::TranslateEventProto* translate_events) override;
   void FlushTranslateEvents(
       std::vector<metrics::TranslateEventProto>* events) override;