Remove details from BROWSER_CLOSING and BROWSER_CLOSED notifications.

chrome/common/chrome_notification_types.h

Index: chrome/common/chrome_notification_types.h
diff --git a/chrome/common/chrome_notification_types.h b/chrome/common/chrome_notification_types.h
index 8d88e677e10f40b02635ec30eb42ce0017683588..339ca59366dc7745e3c21169365dac3e3f6b2436 100644
--- a/chrome/common/chrome_notification_types.h
+++ b/chrome/common/chrome_notification_types.h
@@ -25,20 +25,13 @@ enum NotificationType {
   NOTIFICATION_BROWSER_WINDOW_READY,
 
   // This message is sent when a browser is closing. The source is a
-  // Source<Browser> containing the affected Browser. Details is a boolean
-  // that if true indicates that the application will be closed as a result of
-  // this browser window closure (i.e. this was the last opened browser
-  // window on win/linux). This is sent prior to BROWSER_CLOSED, and may be
-  // sent more than once for a particular browser.
+  // Source<Browser> containing the affected Browser. No details are expected.
+  // This is sent prior to BROWSER_CLOSED, and may be sent more than once for a
+  // particular browser.
   NOTIFICATION_BROWSER_CLOSING,
 
   // This message is sent after a window has been closed.  The source is a
-  // Source<Browser> containing the affected Browser.  Details is a boolean
-  // that if true indicates that the last browser window has closed - this
-  // does not indicate that the application is exiting (observers should
-  // listen for APP_TERMINATING if they want to detect when the application
-  // will shut down). Note that the boolean pointed to by details is only
-  // valid for the duration of this call.
+  // Source<Browser> containing the affected Browser.  No details are exptected.
   NOTIFICATION_BROWSER_CLOSED,
 
   // This message is sent when closing a browser has been cancelled, either by