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

components/translate/core/browser/translate_prefs.cc

 // Copyright 2014 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.
 
 #include "components/translate/core/browser/translate_prefs.h"
 
 #include <set>
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/prefs/pref_service.h"
 #include "components/prefs/scoped_user_pref_update.h"
 #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 {
 
 const char TranslatePrefs::kPrefLanguageProfile[] = "language_profile";
 const char TranslatePrefs::kPrefTranslateSiteBlacklist[] =
     "translate_site_blacklist";
 const char TranslatePrefs::kPrefTranslateWhitelists[] = "translate_whitelists";
 const char TranslatePrefs::kPrefTranslateDeniedCount[] =
     "translate_denied_count_for_language";
@@ skipping 123 matching lines @@
                                const char* accept_languages_pref,
                                const char* preferred_languages_pref)
     : accept_languages_pref_(accept_languages_pref), prefs_(user_prefs) {
 #if defined(OS_CHROMEOS)
   preferred_languages_pref_ = preferred_languages_pref;
 #else
   DCHECK(!preferred_languages_pref);
 #endif
 }
 
+bool TranslatePrefs::IsEnabled() const {
+  return prefs_->GetBoolean(prefs::kEnableTranslate);
+}
+
 void TranslatePrefs::SetCountry(const std::string& country) {
   country_ = country;
 }
 
 std::string TranslatePrefs::GetCountry() const {
   return country_;
 }
 
 void TranslatePrefs::ResetToDefaults() {
   ClearBlockedLanguages();
@@ skipping 458 matching lines @@
     out_value->push_back(it);
   std::sort(out_value->begin(), out_value->end(),
             [](const LanguageAndProbability& left,
                const LanguageAndProbability& right) {
               return left.second > right.second;
             });
   return confidence;
 }
 
 }  // namespace translate