Add error handling to inline signin flow

chrome/browser/ui/sync/one_click_signin_helper.h

Index: chrome/browser/ui/sync/one_click_signin_helper.h
diff --git a/chrome/browser/ui/sync/one_click_signin_helper.h b/chrome/browser/ui/sync/one_click_signin_helper.h
index 2c0b09dcdc71b4b3c5aa04d3fa900a3a23dfd1c5..8ae4440068d9189aa45f26fc75b428e11d2e4eb3 100644
--- a/chrome/browser/ui/sync/one_click_signin_helper.h
+++ b/chrome/browser/ui/sync/one_click_signin_helper.h
@@ -120,6 +120,13 @@ class OneClickSigninHelper
                                     int child_id,
                                     int route_id);
 
+  // If the |source| is not settings page/webstore, redirects to
+  // the NTP/Apps page.
+  static void RedirectToNtpOrAppsPageIfNecessary(
+      content::WebContents* contents, signin::Source source);
+
+  static void ShowSigninErrorBubble(Browser* browser, const std::string& error);
+
   // Remove the item currently at the top of the history list if it's
   // the Gaia redirect URL. Due to limitations of the NavigationController
   // this cannot be done until a new page becomes "current".
@@ -208,7 +215,6 @@ class OneClickSigninHelper
                                   int route_id);
 
   void RedirectToSignin();
-  void ShowSigninErrorBubble(Browser* browser, const std::string& error);
 
   // Clear all data member of the helper, except for the error.
   void CleanTransientState();