Revert of Removes usage of signin APIs that return scoped_nsobjects.

ios/chrome/browser/ui/authentication/signin_interaction_controller.mm

 // Copyright 2014 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/ui/authentication/signin_interaction_controller.h"
 
 #include "base/logging.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/prefs/pref_service.h"
 #include "components/signin/core/browser/signin_manager.h"
@@ skipping 97 matching lines @@
       ios::GetChromeBrowserProvider()->GetChromeIdentityService();
   if (identity) {
     DCHECK(identityService->IsValidIdentity(identity));
     DCHECK(!signinViewController_);
     [self showSigninViewControllerWithIdentity:identity identityAdded:NO];
   } else if (identityService->HasIdentities()) {
     DCHECK(!signinViewController_);
     [self showSigninViewControllerWithIdentity:nil identityAdded:NO];
   } else {
     identityInteractionManager_ =
-        identityService->CreateChromeIdentityInteractionManager(browserState_,
-                                                                self);
+        identityService->NewChromeIdentityInteractionManager(browserState_,
+                                                             self);
     if (!identityInteractionManager_) {
       // Abort sign-in if the ChromeIdentityInteractionManager returned is
       // nil (this can happen when the iOS internal provider is not used).
       [self runCompletionCallbackWithSuccess:NO executeCommand:nil];
       return;
     }
 
     __weak SigninInteractionController* weakSelf = self;
     [identityInteractionManager_
         addAccountWithCompletion:^(ChromeIdentity* identity, NSError* error) {
@@ skipping 25 matching lines @@
     emailToReauthenticate = browserState_->GetPrefs()->GetString(
         prefs::kGoogleServicesLastUsername);
     idToReauthenticate = browserState_->GetPrefs()->GetString(
         prefs::kGoogleServicesLastAccountId);
   }
   DCHECK(!emailToReauthenticate.empty());
   DCHECK(!idToReauthenticate.empty());
   identityInteractionManager_ =
       ios::GetChromeBrowserProvider()
           ->GetChromeIdentityService()
-          ->CreateChromeIdentityInteractionManager(browserState_, self);
+          ->NewChromeIdentityInteractionManager(browserState_, self);
   __weak SigninInteractionController* weakSelf = self;
   [identityInteractionManager_
       reauthenticateUserWithID:base::SysUTF8ToNSString(idToReauthenticate)
                          email:base::SysUTF8ToNSString(emailToReauthenticate)
                     completion:^(ChromeIdentity* identity, NSError* error) {
                       [weakSelf handleIdentityAdded:identity
                                               error:error
                                        shouldSignIn:YES
                                      viewController:viewController];
                     }];
 }
 
 - (void)addAccountWithCompletion:(CompletionCallback)completion
                   viewController:(UIViewController*)viewController {
   completionCallback_ = [completion copy];
   identityInteractionManager_ =
       ios::GetChromeBrowserProvider()
           ->GetChromeIdentityService()
-          ->CreateChromeIdentityInteractionManager(browserState_, self);
+          ->NewChromeIdentityInteractionManager(browserState_, self);
   __weak SigninInteractionController* weakSelf = self;
   [identityInteractionManager_
       addAccountWithCompletion:^(ChromeIdentity* identity, NSError* error) {
         [weakSelf handleIdentityAdded:identity
                                 error:error
                          shouldSignIn:NO
                        viewController:viewController];
       }];
 }
 
@@ skipping 191 matching lines @@
     completionCallback_(success);
     completionCallback_ = nil;
   }
   strongSelf = nil;
   if (command) {
     [presentingViewController chromeExecuteCommand:command];
   }
 }
 
 @end