[ios] Implements even more of ChromiumBrowserProvider.

ios/chrome/browser/providers/chromium_voice_search_provider.mm

 // 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.
 
 #import "ios/chrome/browser/providers/chromium_voice_search_provider.h"
 
+#import "ios/public/provider/chrome/browser/voice/voice_search_language.h"
+
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 ChromiumVoiceSearchProvider::ChromiumVoiceSearchProvider() {}
 
 ChromiumVoiceSearchProvider::~ChromiumVoiceSearchProvider() {}
 
 bool ChromiumVoiceSearchProvider::IsVoiceSearchEnabled() const {
   return false;
 }
+
+NSArray* ChromiumVoiceSearchProvider::GetAvailableLanguages() const {
+  // Add two arbitrary languages to the list, so that options show up in the
+  // voice search settings page.
+  VoiceSearchLanguage* en_US =
+      [[VoiceSearchLanguage alloc] initWithIdentifier:@"en-US"
+                                          displayName:@"English (US)"
+                               localizationPreference:nil];
+  VoiceSearchLanguage* fr =
+      [[VoiceSearchLanguage alloc] initWithIdentifier:@"fr"
+                                          displayName:@"French"
+                               localizationPreference:nil];
+
+  return @[ en_US, fr ];
+}