[ios] Implements more of ChromiumBrowserProvider.

ios/chrome/browser/providers/chromium_browser_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_browser_provider.h"
 
 #include "base/memory/ptr_util.h"
 #import "ios/chrome/browser/providers/chromium_logo_controller.h"
 #import "ios/chrome/browser/providers/chromium_voice_search_provider.h"
+#include "ios/public/provider/chrome/browser/signin/chrome_identity_service.h"
+#include "ios/public/provider/chrome/browser/signin/signin_error_provider.h"
+#include "ios/public/provider/chrome/browser/signin/signin_resources_provider.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 ChromiumBrowserProvider::ChromiumBrowserProvider()
-    : voice_search_provider_(base::MakeUnique<ChromiumVoiceSearchProvider>()) {}
+    : signin_error_provider_(base::MakeUnique<ios::SigninErrorProvider>()),
+      signin_resources_provider_(
+          base::MakeUnique<ios::SigninResourcesProvider>()),
+      voice_search_provider_(base::MakeUnique<ChromiumVoiceSearchProvider>()) {}
 
 ChromiumBrowserProvider::~ChromiumBrowserProvider() {}
 
+ios::SigninErrorProvider* ChromiumBrowserProvider::GetSigninErrorProvider() {
+  return signin_error_provider_.get();
+}
+
+ios::SigninResourcesProvider*
+ChromiumBrowserProvider::GetSigninResourcesProvider() {
+  return signin_resources_provider_.get();
+}
+
+void ChromiumBrowserProvider::SetChromeIdentityServiceForTesting(
+    std::unique_ptr<ios::ChromeIdentityService> service) {
+  chrome_identity_service_ = std::move(service);
+}
+
+ios::ChromeIdentityService*
+ChromiumBrowserProvider::GetChromeIdentityService() {
+  if (!chrome_identity_service_) {
+    chrome_identity_service_ = base::MakeUnique<ios::ChromeIdentityService>();
+  }
+  return chrome_identity_service_.get();
+}
+
+void ChromiumBrowserProvider::InitializeCastService(id main_tab_model) const {}
+
+void ChromiumBrowserProvider::AttachTabHelpers(web::WebState* web_state,
+                                               id tab) const {}
+
 VoiceSearchProvider* ChromiumBrowserProvider::GetVoiceSearchProvider() const {
   return voice_search_provider_.get();
 }
 
 id<LogoVendor> ChromiumBrowserProvider::CreateLogoVendor(
     ios::ChromeBrowserState* browser_state,
     id<UrlLoader> loader) const {
   return [[ChromiumLogoController alloc] init];
 }