[ios] Adds a provider API for AudioSessionController.

ios/public/provider/chrome/browser/test_chrome_browser_provider.mm

 // Copyright 2013 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 "ios/public/provider/chrome/browser/test_chrome_browser_provider.h"
 
 #import <UIKit/UIKit.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/ptr_util.h"
 #include "ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h"
 #import "ios/public/provider/chrome/browser/test_updatable_resource_provider.h"
+#import "ios/public/provider/chrome/browser/voice/test_voice_search_provider.h"
 #import "ios/public/provider/chrome/browser/voice/voice_search_language.h"
 
 @interface TestStyledTextField : UITextField<TextFieldStyling>
 @end
 
 @implementation TestStyledTextField
 @synthesize placeholderStyle = _placeholderStyle;
 @synthesize textValidator = _textValidator;
 
 - (void)setUseErrorStyling:(BOOL)error {
 }
 @end
 
 namespace ios {
 
 TestChromeBrowserProvider::TestChromeBrowserProvider()
-    : test_updatable_resource_provider_(new TestUpdatableResourceProvider) {}
+    : updatable_resource_provider_(
+          base::MakeUnique<TestUpdatableResourceProvider>()),
+      voice_search_provider_(base::MakeUnique<TestVoiceSearchProvider>()) {}
 
 TestChromeBrowserProvider::~TestChromeBrowserProvider() {}
 
 // static
 TestChromeBrowserProvider* TestChromeBrowserProvider::GetTestProvider() {
   ChromeBrowserProvider* provider = GetChromeBrowserProvider();
   DCHECK(provider);
   return static_cast<TestChromeBrowserProvider*>(provider);
 }
 
 void TestChromeBrowserProvider::SetChromeIdentityServiceForTesting(
     std::unique_ptr<ChromeIdentityService> service) {
   chrome_identity_service_.swap(service);
 }
 
 ChromeIdentityService* TestChromeBrowserProvider::GetChromeIdentityService() {
   if (!chrome_identity_service_) {
     chrome_identity_service_.reset(new FakeChromeIdentityService());
   }
   return chrome_identity_service_.get();
 }
 
 UpdatableResourceProvider*
 TestChromeBrowserProvider::GetUpdatableResourceProvider() {
-  return test_updatable_resource_provider_.get();
+  return updatable_resource_provider_.get();
 }
 
 UITextField<TextFieldStyling>* TestChromeBrowserProvider::CreateStyledTextField(
     CGRect frame) const {
   return [[TestStyledTextField alloc] initWithFrame:frame];
 }
 
 NSArray* TestChromeBrowserProvider::GetAvailableVoiceSearchLanguages() const {
-  base::scoped_nsobject<VoiceSearchLanguage> en([[VoiceSearchLanguage alloc]
-          initWithIdentifier:@"en-US"
-                 displayName:@"English (US)"
-      localizationPreference:nil]);
-  return @[ en ];
+  return voice_search_provider_->GetAvailableLanguages();
+}
+
+VoiceSearchProvider* TestChromeBrowserProvider::GetVoiceSearchProvider() const {
+  return voice_search_provider_.get();
 }
 
 }  // namespace ios