Remove details from BROWSER_CLOSING and BROWSER_CLOSED notifications.

chrome/common/automation_messages_internal.h

Index: chrome/common/automation_messages_internal.h
diff --git a/chrome/common/automation_messages_internal.h b/chrome/common/automation_messages_internal.h
index b7badc4ba790454824149381c057deaa66cee2d2..1e7f33c459ed5b2e2980da71dca0fb1583baf2ca 100644
--- a/chrome/common/automation_messages_internal.h
+++ b/chrome/common/automation_messages_internal.h
@@ -312,11 +312,8 @@ IPC_SYNC_MESSAGE_CONTROL2_1(AutomationMsg_CloseTab,
 //   - int: handle of the browser which contains the tab
 // Response:
 //  - bool: whether the operation was successfull.
-//  - bool: whether the browser process will be terminated as a result (if
-//          this was the last closed browser window).
-IPC_SYNC_MESSAGE_CONTROL1_2(AutomationMsg_CloseBrowser,
+IPC_SYNC_MESSAGE_CONTROL1_1(AutomationMsg_CloseBrowser,
                             int,
-                            bool,
                             bool)
 
 #if defined(OS_WIN)