Display local signin error without browser and record the path of selected profile in user manager.

chrome/browser/ui/webui/signin/signin_error_handler.cc

Index: chrome/browser/ui/webui/signin/signin_error_handler.cc
diff --git a/chrome/browser/ui/webui/signin/signin_error_handler.cc b/chrome/browser/ui/webui/signin/signin_error_handler.cc
index 26b9d8a4f0090cfe2eede730ffd3bdf057f62364..93fc7a32eae28cfaea18a1b2b6bf06971c69f580 100644
--- a/chrome/browser/ui/webui/signin/signin_error_handler.cc
+++ b/chrome/browser/ui/webui/signin/signin_error_handler.cc
@@ -10,10 +10,14 @@
 #include "chrome/browser/profiles/profile_window.h"
 #include "chrome/browser/signin/signin_ui_util.h"
 #include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/user_manager.h"
 #include "chrome/browser/ui/webui/signin/signin_utils.h"
 #include "content/public/browser/web_ui.h"
 #include "url/gurl.h"
 
+SigninErrorHandler::SigninErrorHandler(bool is_system_profile)
+    : is_system_profile_(is_system_profile) {}
+
 void SigninErrorHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback(
       "confirm",
@@ -70,7 +74,11 @@ void SigninErrorHandler::HandleInitializedWithSize(
 }
 
 void SigninErrorHandler::CloseDialog() {
-  Browser* browser = signin::GetDesktopBrowser(web_ui());
-  DCHECK(browser);
-  browser->CloseModalSigninWindow();
+  if (is_system_profile_) {
+    UserManager::HideReauthDialog();
+  } else {
+    Browser* browser = signin::GetDesktopBrowser(web_ui());
+    DCHECK(browser);
+    browser->CloseModalSigninWindow();
+  }

[Roger Tawa OOO till Jul 10th, 2016/09/22 18:59:13]

Can you add a comment why this change is needed?  I don't see how it fits into
this CL.

[zmin, 2016/09/22 19:14:56]

With the old CloseDialog logic, the user manager window will be closed with
error dialog. Because with force-signin enabled, there is no browser window at
all which means the Chrome will be closed completely.

That's why I make the change to close the dialog without closing user manager
here.

[Roger Tawa OOO till Jul 10th, 2016/09/22 19:27:20]

Cool.  Can you add a comment to the code explaining that?

[zmin, 2016/09/22 19:30:56]

Done.

 }