[ios] Implements even more of ChromiumBrowserProvider.

ios/chrome/browser/providers/chromium_voice_search_provider.mm

Index: ios/chrome/browser/providers/chromium_voice_search_provider.mm
diff --git a/ios/chrome/browser/providers/chromium_voice_search_provider.mm b/ios/chrome/browser/providers/chromium_voice_search_provider.mm
index d35449b3645db3ae611c05249a6b5dbf36487a62..3f7ae401e20e84bd286eb6d310406a879eb0aaaa 100644
--- a/ios/chrome/browser/providers/chromium_voice_search_provider.mm
+++ b/ios/chrome/browser/providers/chromium_voice_search_provider.mm
@@ -4,6 +4,8 @@
 
 #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
@@ -15,3 +17,16 @@ ChromiumVoiceSearchProvider::~ChromiumVoiceSearchProvider() {}
 bool ChromiumVoiceSearchProvider::IsVoiceSearchEnabled() const {
   return false;
 }
+
+NSArray* ChromiumVoiceSearchProvider::GetAvailableLanguages() const {
+  VoiceSearchLanguage* en =
+      [[VoiceSearchLanguage alloc] initWithIdentifier:@"en-US"
+                                          displayName:@"English (US)"
+                               localizationPreference:nil];
+  VoiceSearchLanguage* hi =

[sdefresne, 2016/11/24 10:56:37]

Why this second language? Does the code need at least two languages? If not, can
we do with just english (maybe en-US and en-GB)?

[rohitrao (ping after 24h), 2016/11/24 11:46:42]

No particular reason, it just seemed like having more than one language might
help expose bugs down the road, as the voice search settings page is still
usable (even if changing the pref does nothing).

Choice of languages was arbitrary.  Switched to en+fr.

+      [[VoiceSearchLanguage alloc] initWithIdentifier:@"hi"
+                                          displayName:@"Hindi"
+                               localizationPreference:nil];
+
+  return @[ en, hi ];
+}