Mac: reform our shutdown routine.

chrome/browser/browser_list.cc

Index: chrome/browser/browser_list.cc
diff --git a/chrome/browser/browser_list.cc b/chrome/browser/browser_list.cc
index ec7865d1443ab2808e60a0e714afaaf4adffa03c..94b0c6bce9ef272cc5c4134e2260f90145d60903 100644
--- a/chrome/browser/browser_list.cc
+++ b/chrome/browser/browser_list.cc
@@ -253,8 +253,8 @@ void BrowserList::CloseAllBrowsersAndExit() {
   CloseAllBrowsers(true);
 #else
   // On the Mac, the application continues to run once all windows are closed.
-  // Terminate will result in a CloseAllBrowsers(true) call, and additionally,
-  // will cause the application to exit cleanly.
+  // Terminate will result in a CloseAllBrowsers(true) call, and once (and if)
+  // that is done, will cause the application to exit cleanly.
   chrome_browser_application_mac::Terminate();
 #endif
 }