Indicate that sync was disabled by administrator.

chrome/browser/ui/cocoa/profiles/signin_view_controller_delegate_mac.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.
 
 #include "chrome/browser/ui/cocoa/profiles/signin_view_controller_delegate_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 23 matching lines @@
 // Height of the tab-modal dialog displaying the password-separated signin
 // flow. It matches the dimensions of the server content the dialog displays.
 const CGFloat kFixedGaiaViewHeight = 612;
 
 // Initial height of the sync confirmation modal dialog.
 const int kSyncConfirmationDialogHeight = 351;
 
 // Initial height of the signin error modal dialog.
 const int kSigninErrorDialogHeight = 164;
 
+CGFloat GetSyncConfirmationDialogPreferredHeight(Profile* profile) {
+  // If sync is disabled, then the sync confirmation dialog looks like an error
+  // dialog and thus it has the same preferred size.
+  return profile->IsSyncAllowed() ? kSyncConfirmationDialogHeight
+                                  : kSigninErrorDialogHeight;
+}
+
 }  // namespace
 
 SigninViewControllerDelegateMac::SigninViewControllerDelegateMac(
     SigninViewController* signin_view_controller,
     std::unique_ptr<content::WebContents> web_contents,
     content::WebContents* host_web_contents,
     NSRect frame,
     bool wait_for_size)
     : SigninViewControllerDelegate(signin_view_controller, web_contents.get()),
       web_contents_(std::move(web_contents)),
@@ skipping 51 matching lines @@
 SigninViewControllerDelegateMac::CreateSyncConfirmationWebContents(
     Profile* profile) {
   std::unique_ptr<content::WebContents> web_contents(
       content::WebContents::Create(
           content::WebContents::CreateParams(profile)));
   web_contents->GetController().LoadURL(
       GURL(chrome::kChromeUISyncConfirmationURL), content::Referrer(),
       ui::PAGE_TRANSITION_AUTO_TOPLEVEL, std::string());
 
   NSView* webview = web_contents->GetNativeView();
-  [webview setFrameSize:NSMakeSize(kModalDialogWidth,
-                                   kSyncConfirmationDialogHeight)];
+  [webview setFrameSize:NSMakeSize(
+                            kModalDialogWidth,
+                            GetSyncConfirmationDialogPreferredHeight(profile))];
 
   return web_contents;
 }
 
 // static
 std::unique_ptr<content::WebContents>
 SigninViewControllerDelegateMac::CreateSigninErrorWebContents(
     Profile* profile) {
   std::unique_ptr<content::WebContents> web_contents(
       content::WebContents::Create(
@@ skipping 69 matching lines @@
 SigninViewControllerDelegate*
 SigninViewControllerDelegate::CreateSyncConfirmationDelegate(
     SigninViewController* signin_view_controller,
     Browser* browser) {
   return new SigninViewControllerDelegateMac(
       signin_view_controller,
       SigninViewControllerDelegateMac::CreateSyncConfirmationWebContents(
           browser->profile()),
       browser->tab_strip_model()->GetActiveWebContents(),
       NSMakeRect(0, 0, kModalDialogWidth,
-                 kSyncConfirmationDialogHeight),
+                 GetSyncConfirmationDialogPreferredHeight(browser->profile())),
       true);
 }
 
 // static
 SigninViewControllerDelegate*
 SigninViewControllerDelegate::CreateSigninErrorDelegate(
     SigninViewController* signin_view_controller,
     Browser* browser) {
   return new SigninViewControllerDelegateMac(
       signin_view_controller,
       SigninViewControllerDelegateMac::CreateSigninErrorWebContents(
           browser->profile()),
       browser->tab_strip_model()->GetActiveWebContents(),
       NSMakeRect(0, 0, kModalDialogWidth, kSigninErrorDialogHeight), true);
 }