Add account_id to signin manager notifications.

chrome/browser/sync_file_system/drive_backend/sync_engine.h

Index: chrome/browser/sync_file_system/drive_backend/sync_engine.h
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_engine.h b/chrome/browser/sync_file_system/drive_backend/sync_engine.h
index eb628d82ff549e91b445a3641675235fc5302edb..5bc15f6a0be243aba5b81dfa4e2b2926139dee71 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_engine.h
+++ b/chrome/browser/sync_file_system/drive_backend/sync_engine.h
@@ -148,9 +148,11 @@ class SyncEngine : public RemoteFileSyncService,
 
   // SigninManagerBase::Observer overrides.
   virtual void GoogleSigninFailed(const GoogleServiceAuthError& error) OVERRIDE;
-  virtual void GoogleSigninSucceeded(const std::string& username,
+  virtual void GoogleSigninSucceeded(const std::string& account_id,
+                                     const std::string& username,
                                      const std::string& password) OVERRIDE;
-  virtual void GoogleSignedOut(const std::string& username) OVERRIDE;
+  virtual void GoogleSignedOut(const std::string& account_id,
+                               const std::string& username) OVERRIDE;
 
  private:
   class WorkerObserver;