Translate: do not show the context menu entry when the feature is disabled

components/translate/core/browser/translate_prefs.cc

Index: components/translate/core/browser/translate_prefs.cc
diff --git a/components/translate/core/browser/translate_prefs.cc b/components/translate/core/browser/translate_prefs.cc
index 63d758b0aa7b2f54b7063ed5fb4c2a702674ec41..92391c564570ddbaf0df417150a56049bb43e778 100644
--- a/components/translate/core/browser/translate_prefs.cc
+++ b/components/translate/core/browser/translate_prefs.cc
@@ -17,6 +17,7 @@
 #include "components/translate/core/browser/translate_accept_languages.h"
 #include "components/translate/core/browser/translate_download_manager.h"
 #include "components/translate/core/browser/translate_experiment.h"
+#include "components/translate/core/browser/translate_pref_names.h"
 #include "components/translate/core/common/translate_util.h"
 
 namespace translate {
@@ -160,6 +161,10 @@ TranslatePrefs::TranslatePrefs(PrefService* user_prefs,
 #endif
 }
 
+bool TranslatePrefs::IsEnabled() const {
+  return prefs_->GetBoolean(prefs::kEnableTranslate);
+}
+
 void TranslatePrefs::SetCountry(const std::string& country) {
   country_ = country;
 }