Remove ChromeBrowserProvider::RegisterProfilePrefs().

ios/public/provider/chrome/browser/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/chrome_browser_provider.h"
 
 #include <cstddef>
 
 #include "base/logging.h"
 #include "components/metrics/metrics_provider.h"
@@ skipping 16 matching lines @@
 // A dummy implementation of ChromeBrowserProvider.
 
 ChromeBrowserProvider::ChromeBrowserProvider() {}
 
 ChromeBrowserProvider::~ChromeBrowserProvider() {}
 
 void ChromeBrowserProvider::Initialize() const {}
 
 void ChromeBrowserProvider::AssertBrowserContextKeyedFactoriesBuilt() {}
 
-void ChromeBrowserProvider::RegisterProfilePrefs(
-    user_prefs::PrefRegistrySyncable* registry) {}
-
 SigninErrorProvider* ChromeBrowserProvider::GetSigninErrorProvider() {
   return nullptr;
 }
 
 SigninResourcesProvider* ChromeBrowserProvider::GetSigninResourcesProvider() {
   return nullptr;
 }
 
 void ChromeBrowserProvider::SetChromeIdentityServiceForTesting(
     std::unique_ptr<ChromeIdentityService> service) {}
@@ skipping 101 matching lines @@
 id<NativeAppWhitelistManager>
 ChromeBrowserProvider::GetNativeAppWhitelistManager() const {
   return nil;
 }
 
 void ChromeBrowserProvider::HideModalViewStack() const {}
 
 void ChromeBrowserProvider::LogIfModalViewsArePresented() const {}
 
 }  // namespace ios