Exclude building signin view controller and its delegate on ChromeOS

chrome/browser/ui/cocoa/profiles/profile_chooser_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 "chrome/browser/ui/cocoa/profiles/profile_chooser_controller.h"
 
 #import <Carbon/Carbon.h>  // kVK_Return.
 #import <Cocoa/Cocoa.h>
 #include <stddef.h>
 
@@ skipping 1114 matching lines @@
   [self initMenuContentsWithView:profiles::BUBBLE_VIEW_MODE_PROFILE_CHOOSER];
 }
 
 - (IBAction)lockProfile:(id)sender {
   profiles::LockProfile(browser_->profile());
   [self postActionPerformed:ProfileMetrics::PROFILE_DESKTOP_MENU_LOCK];
 }
 
 - (void)showSigninUIForMode:(profiles::BubbleViewMode)mode {
   if (SigninViewController::ShouldShowModalSigninForMode(mode)) {
-    browser_->ShowModalSigninWindow(mode, accessPoint_);
+    browser_->signin_view_controller()->ShowModalSignin(mode, browser_,
+                                                        accessPoint_);
   } else {
     [self initMenuContentsWithView:mode];
   }
 }
 
 - (IBAction)showInlineSigninPage:(id)sender {
   [self showSigninUIForMode:profiles::BUBBLE_VIEW_MODE_GAIA_SIGNIN];
 }
 
 - (IBAction)addAccount:(id)sender {
@@ skipping 1499 matching lines @@
 
 - (void)showWindow:(id)sender {
   [super showWindow:sender];
   NSEvent *event = [[NSApplication sharedApplication] currentEvent];
   if (firstProfileView_ && [event type] == NSKeyDown) {
     [[self window] makeFirstResponder:firstProfileView_];
   }
 }
 
 @end