Add "Sign In" button to the account chooser on Mac.

chrome/browser/ui/passwords/password_dialog_controller.h

 // Copyright 2015 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_UI_PASSWORDS_PASSWORD_DIALOG_CONTROLLER_H_
 #define CHROME_BROWSER_UI_PASSWORDS_PASSWORD_DIALOG_CONTROLLER_H_
 
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 16 matching lines @@
   virtual const FormsVector& GetLocalForms() const = 0;
 
   // Returns IDP's forms which can be used for logging in.
   virtual const FormsVector& GetFederationsForms() const = 0;
 
   // Returns a title of the account chooser and a range of the Smart Lock
   // hyperlink if it exists. If the range is empty then no hyperlink is shown.
   virtual std::pair<base::string16, gfx::Range> GetAccoutChooserTitle() const
       = 0;
 
+  // Whether the account chooser should display the "Sign in" button.
+  virtual bool ShouldShowSignInButton() const = 0;
+
   // Returns the title for the autosignin first run dialog.
   virtual base::string16 GetAutoSigninPromoTitle() const = 0;
 
   // Returns a text of the auto signin first run promo and a range of the Smart
   // Lock hyperlink if it exists. The empty range means no hyperlink is shown.
   virtual std::pair<base::string16, gfx::Range> GetAutoSigninText() const = 0;
 
   // Called when the Smart Lock hyperlink is clicked.
   virtual void OnSmartLockLinkClicked() = 0;
 
   // Called when the user chooses a credential.
   virtual void OnChooseCredentials(
       const autofill::PasswordForm& password_form,
       password_manager::CredentialType credential_type) = 0;
 
+  // Called when the user clicks "Sign in" in the account chooser.
+  virtual void OnSignInClicked() = 0;
+
   // Called when user clicks OK in the auto signin first run promo.
   virtual void OnAutoSigninOK() = 0;
 
   // Called when user disables the auto signin setting.
   virtual void OnAutoSigninTurnOff() = 0;
 
   // Called when the dialog was closed.
   virtual void OnCloseDialog() = 0;
 
  protected:
   virtual ~PasswordDialogController() = default;
 };
 
 
 #endif  // CHROME_BROWSER_UI_PASSWORDS_PASSWORD_DIALOG_CONTROLLER_H_