Exclude building signin view controller and its delegate on ChromeOS

chrome/browser/ui/cocoa/browser_window_cocoa.mm

 // Copyright (c) 2012 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 "chrome/browser/ui/cocoa/browser_window_cocoa.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #import "base/mac/sdk_forward_declarations.h"
@@ skipping 793 matching lines @@
     AvatarBubbleMode mode,
     const signin::ManageAccountsParams& manage_accounts_params,
     signin_metrics::AccessPoint access_point,
     bool is_source_keyboard) {
   profiles::BubbleViewMode bubble_view_mode;
   profiles::TutorialMode tutorial_mode;
   profiles::BubbleViewModeFromAvatarBubbleMode(mode, &bubble_view_mode,
                                                &tutorial_mode);
 
   if (SigninViewController::ShouldShowModalSigninForMode(bubble_view_mode)) {
-    browser_->ShowModalSigninWindow(bubble_view_mode, access_point);
+    browser_->signin_view_controller()->ShowModalSignin(bubble_view_mode,
+                                                        browser_, access_point);
   } else {
     AvatarBaseController* controller = [controller_ avatarButtonController];
     NSView* anchor = [controller buttonView];
     if ([anchor isHiddenOrHasHiddenAncestor])
       anchor = [[controller_ toolbarController] appMenuButton];
     [controller showAvatarBubbleAnchoredAt:anchor
                                   withMode:mode
                            withServiceType:manage_accounts_params.service_type
                            fromAccessPoint:access_point];
   }
@@ skipping 15 matching lines @@
 ExclusiveAccessContext* BrowserWindowCocoa::GetExclusiveAccessContext() {
   return [controller_ exclusiveAccessController];
 }
 
 void BrowserWindowCocoa::ShowImeWarningBubble(
     const extensions::Extension* extension,
     const base::Callback<void(ImeWarningBubblePermissionStatus status)>&
         callback) {
   NOTREACHED() << "The IME warning bubble is unsupported on this platform.";
 }