implement sign in dialog

chrome/browser/extensions/api/identity/identity_api.h

 // Copyright (c) 2012 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_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/extensions/api/identity/web_auth_flow.h"
 #include "chrome/browser/extensions/app_notify_channel_setup.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/extension_function.h"
+#include "chrome/browser/ui/webui/signin/login_ui_service.h"
 #include "chrome/common/net/gaia/oauth2_mint_token_flow.h"
 
 class GoogleServiceAuthError;
 
 namespace extensions {
 
 class GetAuthTokenFunction : public AsyncExtensionFunction,
                              public OAuth2MintTokenFlow::Delegate,
-                             public ExtensionInstallPrompt::Delegate {
+                             public ExtensionInstallPrompt::Delegate,
+                             public LoginUIService::Observer {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.identity.getAuthToken");
 
   GetAuthTokenFunction();
 
  private:
   virtual ~GetAuthTokenFunction();
 
   // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
 
   // OAuth2MintTokenFlow::Delegate implementation:
   virtual void OnMintTokenSuccess(const std::string& access_token) OVERRIDE;
-  virtual void OnMintTokenFailure(const GoogleServiceAuthError& error) OVERRIDE;
+  virtual void OnMintTokenFailure(
+      const GoogleServiceAuthError& error) OVERRIDE;
   virtual void OnIssueAdviceSuccess(
       const IssueAdviceInfo& issue_advice) OVERRIDE;
 
+  // LoginUIService::Observer implementation.
+  virtual void OnLoginUIShown(LoginUIService::LoginUI* ui) OVERRIDE;
+  virtual void OnLoginUIClosed(LoginUIService::LoginUI* ui) OVERRIDE;
+
   // ExtensionInstallPrompt::Delegate implementation:
   virtual void InstallUIProceed() OVERRIDE;
   virtual void InstallUIAbort(bool user_initiated) OVERRIDE;
 
+  // Shows the login UI in a browser popup.
+  bool StartLogin();
   // Starts a MintTokenFlow with the given mode; Returns success.
   bool StartFlow(OAuth2MintTokenFlow::Mode mode);
 
+  // Checks if there is a master login token to mint token for the extension.
+  bool HasLoginToken() const;
+
+  // Gets the token mint flow mode based on a command-line flag.
+  OAuth2MintTokenFlow::Mode GetTokenFlowMode() const;
+
   bool interactive_;
   scoped_ptr<OAuth2MintTokenFlow> flow_;
 
   // When launched in interactive mode, and if there is no existing grant,
   // a permissions prompt will be popped up to the user.
   scoped_ptr<ExtensionInstallPrompt> install_ui_;
 };
 
 class LaunchWebAuthFlowFunction : public AsyncExtensionFunction,
                                   public WebAuthFlow::Delegate {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.identity.launchWebAuthFlow");
 
   LaunchWebAuthFlowFunction();
 
  private:
   virtual ~LaunchWebAuthFlowFunction();
   virtual bool RunImpl() OVERRIDE;
 
   // WebAuthFlow::Delegate implementation.
   virtual void OnAuthFlowSuccess(const std::string& redirect_url) OVERRIDE;
   virtual void OnAuthFlowFailure() OVERRIDE;
 
   scoped_ptr<WebAuthFlow> auth_flow_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_