Revert of Delete dead signin code (SigninGlobalError)

chrome/browser/signin/signin_global_error.h

Index: chrome/browser/signin/signin_global_error.h
diff --git a/chrome/browser/signin/signin_global_error.h b/chrome/browser/signin/signin_global_error.h
new file mode 100644
index 0000000000000000000000000000000000000000..86846c80437885952ed3449185e4b724959ef9f3
--- /dev/null
+++ b/chrome/browser/signin/signin_global_error.h
@@ -0,0 +1,71 @@
+// Copyright (c) 2013 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.
+
+#ifndef CHROME_BROWSER_SIGNIN_SIGNIN_GLOBAL_ERROR_H_
+#define CHROME_BROWSER_SIGNIN_SIGNIN_GLOBAL_ERROR_H_
+
+#include <set>
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/gtest_prod_util.h"
+#include "chrome/browser/ui/global_error/global_error.h"
+#include "components/keyed_service/core/keyed_service.h"
+#include "components/signin/core/browser/signin_error_controller.h"
+
+class Profile;
+
+// Shows auth errors on the wrench menu using a bubble view and a menu item.
+class SigninGlobalError : public GlobalErrorWithStandardBubble,
+                          public SigninErrorController::Observer,
+                          public KeyedService {
+ public:
+  SigninGlobalError(SigninErrorController* error_controller,
+                    Profile* profile);
+  ~SigninGlobalError() override;
+
+  // Returns true if there is an authentication error.
+  bool HasError();
+
+  // Shows re-authentication UI to the user in an attempt to fix the error.
+  // The re-authentication UI will be shown in |browser|.
+  void AttemptToFixError(Browser* browser);
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(SigninGlobalErrorTest, NoErrorAuthStatusProviders);
+  FRIEND_TEST_ALL_PREFIXES(SigninGlobalErrorTest, ErrorAuthStatusProvider);
+  FRIEND_TEST_ALL_PREFIXES(SigninGlobalErrorTest, AuthStatusEnumerateAllErrors);
+
+  // KeyedService:
+  void Shutdown() override;
+
+  // GlobalErrorWithStandardBubble:
+  bool HasMenuItem() override;
+  int MenuItemCommandID() override;
+  base::string16 MenuItemLabel() override;
+  void ExecuteMenuItem(Browser* browser) override;
+  bool HasBubbleView() override;
+  base::string16 GetBubbleViewTitle() override;
+  std::vector<base::string16> GetBubbleViewMessages() override;
+  base::string16 GetBubbleViewAcceptButtonLabel() override;
+  base::string16 GetBubbleViewCancelButtonLabel() override;
+  void OnBubbleViewDidClose(Browser* browser) override;
+  void BubbleViewAcceptButtonPressed(Browser* browser) override;
+  void BubbleViewCancelButtonPressed(Browser* browser) override;
+
+  // SigninErrorController::Observer:
+  void OnErrorChanged() override;
+
+  // The Profile this service belongs to.
+  Profile* profile_;
+
+  // The SigninErrorController that provides auth status.
+  SigninErrorController* error_controller_;
+
+  // True if signin global error was added to the global error service.
+  bool is_added_to_global_error_service_;
+
+  DISALLOW_COPY_AND_ASSIGN(SigninGlobalError);
+};
+
+#endif  // CHROME_BROWSER_SIGNIN_SIGNIN_GLOBAL_ERROR_H_