Support for auth code based authentication flow for both app and web UI driven flow.

chrome/browser/chromeos/login/oauth2_login_manager.h

Index: chrome/browser/chromeos/login/oauth2_login_manager.h
diff --git a/chrome/browser/chromeos/login/oauth2_login_manager.h b/chrome/browser/chromeos/login/oauth2_login_manager.h
index 3f358d56e9d0b982ac05b0272035e3ec1be3cba3..a133f1a9b626a2544ce5bd725e4535b022ae55e0 100644
--- a/chrome/browser/chromeos/login/oauth2_login_manager.h
+++ b/chrome/browser/chromeos/login/oauth2_login_manager.h
@@ -40,7 +40,9 @@ class OAuth2LoginManager : public OAuthLoginManager,
   virtual void RestoreSession(
       Profile* user_profile,
       net::URLRequestContextGetter* auth_request_context,
-      bool restore_from_auth_cookies) OVERRIDE;
+      SessionRestoreStrategy restore_strategy,
+      const std::string& oauth2_refresh_token,
+      const std::string& auth_code) OVERRIDE;
   virtual void ContinueSessionRestore() OVERRIDE;
   virtual void Stop() OVERRIDE;
 
@@ -118,6 +120,8 @@ class OAuth2LoginManager : public OAuthLoginManager,
   scoped_ptr<OAuth2PolicyFetcher> oauth2_policy_fetcher_;
   // OAuth2 refresh token.
   std::string refresh_token_;
+  // Authorization code for fetching OAuth2 tokens.
+  std::string auth_code_;
 
   DISALLOW_COPY_AND_ASSIGN(OAuth2LoginManager);
 };