Changes to the sign in manager in preparation for one-click sign in. This CL

chrome/browser/signin/signin_manager.h

Index: chrome/browser/signin/signin_manager.h
===================================================================
--- chrome/browser/signin/signin_manager.h	(revision 123466)
+++ chrome/browser/signin/signin_manager.h	(working copy)
@@ -82,6 +82,11 @@
   // attempt.
   void ProvideSecondFactorAccessCode(const std::string& access_code);
 
+  // Attempt to sign in this user with existing credentials from the cookie jar.
+  // Otherwise the result is the same as StartSignIn().

[Andrew T Wilson (Slow), 2012/02/27 19:00:10]

Can you clarify this - does this mean we try to login twice (once with cookies,
then once with username/password)? This seems like an odd contract (it's not
clear to me reading this what notifications would get generated in this process,
if the password is guaranteed to be valid if signin is done via cookies, etc).

[Roger Tawa OOO till Jul 10th, 2012/02/29 21:02:54]

No only one login, and this with no user interaction.  This function essentially
uses the cookies already found in the cookie jar to kick off the process of
logging in.  However, the cookies are not enough to get the user's password,
hence it is passed in here.  The username is used to set
possibly_invalid_username_.

+  virtual void StartSignInWithCredentials(const std::string& username,
+                                          const std::string& password);
+
   // Sign a user out, removing the preference, erasing all keys
   // associated with the user, and canceling all auth in progress.
   virtual void SignOut();
@@ -101,10 +106,20 @@
   virtual void OnClientLoginSuccess(const ClientLoginResult& result) OVERRIDE;
   virtual void OnClientLoginFailure(
       const GoogleServiceAuthError& error) OVERRIDE;
+  virtual void OnOAuthLoginTokenSuccess(const std::string& refresh_token,
+                                        const std::string& access_token,
+                                        int expires_in_secs) OVERRIDE;
+  virtual void OnOAuthLoginTokenFailure(
+      const GoogleServiceAuthError& error) OVERRIDE;
   virtual void OnGetUserInfoSuccess(const UserInfoMap& data) OVERRIDE;
   virtual void OnGetUserInfoFailure(
       const GoogleServiceAuthError& error) OVERRIDE;
+  virtual void OnTokenAuthSuccess(const net::ResponseCookies& cookies,
+                                  const std::string& data) OVERRIDE;
   virtual void OnTokenAuthFailure(const GoogleServiceAuthError& error) OVERRIDE;
+  virtual void OnUberAuthTokenSuccess(const std::string& token) OVERRIDE;
+  virtual void OnUberAuthTokenFailure(
+      const GoogleServiceAuthError& error) OVERRIDE;
 
   // content::NotificationObserver
   virtual void Observe(int type,