[Mac] Add text-editing accelerators to the User Manager.

chrome/browser/ui/cocoa/profiles/user_manager_mac.mm

Index: chrome/browser/ui/cocoa/profiles/user_manager_mac.mm
diff --git a/chrome/browser/ui/cocoa/profiles/user_manager_mac.mm b/chrome/browser/ui/cocoa/profiles/user_manager_mac.mm
index 957d95ba57bb6b8b04cab3e077f8fa47836a668c..be3f56625b87c638c7525db1bd08b19783635c62 100644
--- a/chrome/browser/ui/cocoa/profiles/user_manager_mac.mm
+++ b/chrome/browser/ui/cocoa/profiles/user_manager_mac.mm
@@ -55,10 +55,13 @@ class UserManagerWebContentsDelegate : public content::WebContentsDelegate {
     if (![BrowserWindowUtils shouldHandleKeyboardEvent:event])
       return;
 
+    // -getCommandId returns -1 if the event isn't a chrome keyboard shortcut.
     int commandId = [BrowserWindowUtils getCommandId:event];
 
-    // Since the User Manager is a "top level" window, only handle close events.
-    if (commandId == IDC_CLOSE_WINDOW || commandId == IDC_EXIT) {
+    // From the chrome accelerators, only handle close window accelerators, and
+    // allow all other accelerators to be handled by the web contents.
+    if (commandId == -1 || commandId == IDC_CLOSE_WINDOW ||
+        commandId == IDC_EXIT) {
       // Not invoking +[BrowserWindowUtils handleKeyboardEvent here], since the
       // window in question is a ConstrainedWindowCustomWindow, not a
       // BrowserWindow.