Added multi-login support to one-click signin.

chrome/browser/ui/sync/one_click_signin_helper.h

Index: chrome/browser/ui/sync/one_click_signin_helper.h
diff --git a/chrome/browser/ui/sync/one_click_signin_helper.h b/chrome/browser/ui/sync/one_click_signin_helper.h
index 3dbed2a48c565b8330300c54aa577065c00e4ae5..daf80500a2b6af4d6bd2dd7332de14d97df62d0e 100644
--- a/chrome/browser/ui/sync/one_click_signin_helper.h
+++ b/chrome/browser/ui/sync/one_click_signin_helper.h
@@ -41,7 +41,8 @@ class OneClickSigninHelper : public content::WebContentsObserver {
 
  private:
   // The portion of ShowInfoBarIfPossible() that needs to run on the UI thread.
-  static void ShowInfoBarUIThread(const std::string& account,
+  static void ShowInfoBarUIThread(const std::string& session_index,
+                                  const std::string& email,
                                   int child_id,
                                   int route_id);
 
@@ -52,12 +53,14 @@ class OneClickSigninHelper : public content::WebContentsObserver {
   virtual void DidStopLoading() OVERRIDE;
 
   // Save the email address that we can display the info bar correctly.
-  void SaveEmail(const std::string& email);
+  void SaveSessionIndexAndEmail(const std::string& session_index,
+                                const std::string& email);
 
   // Remember the user's password for later use.
   void SavePassword(const std::string& password);
 
-  // Email address and password of the account that has just logged in.
+  // Information about the account that has just logged in.
+  std::string session_index_;
   std::string email_;
   std::string password_;