Add account_id to signin manager notifications.

chrome/browser/sync_file_system/drive_backend/sync_engine.cc

Index: chrome/browser/sync_file_system/drive_backend/sync_engine.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_engine.cc b/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
index f5ea2a975feeb2bfb21f78df431161902af2c272..c2ca930e24397fe9fbef61f66455aa41de0dfaf4 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
+++ b/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
@@ -702,12 +702,14 @@ void SyncEngine::GoogleSigninFailed(const GoogleServiceAuthError& error) {
                      "Failed to sign in.");
 }
 
-void SyncEngine::GoogleSigninSucceeded(const std::string& username,
+void SyncEngine::GoogleSigninSucceeded(const std::string& account_id,
+                                       const std::string& username,
                                        const std::string& password) {
   Initialize();
 }
 
-void SyncEngine::GoogleSignedOut(const std::string& username) {
+void SyncEngine::GoogleSignedOut(const std::string& account_id,
+                                 const std::string& username) {
   Reset();
   UpdateServiceState(REMOTE_SERVICE_AUTHENTICATION_REQUIRED,
                      "User signed out.");