Allow permission bubbles to participate in key event dispatch as if they were a Browser.

ui/views/cocoa/native_widget_mac_nswindow.mm

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ui/views/cocoa/native_widget_mac_nswindow.h"
 
 #include "base/mac/foundation_util.h"
 #import "base/mac/sdk_forward_declarations.h"
 #import "ui/views/cocoa/bridged_native_widget.h"
 #import "ui/base/cocoa/user_interface_item_command_handler.h"
@@ skipping 180 matching lines @@
 }
 
 - (BOOL)redispatchKeyEvent:(NSEvent*)event {
   return [commandDispatcher_ redispatchKeyEvent:event];
 }
 
 - (BOOL)defaultPerformKeyEquivalent:(NSEvent*)event {
   return [super performKeyEquivalent:event];
 }
 
+- (BOOL)defaultValidateUserInterfaceItem:
+    (id<NSValidatedUserInterfaceItem>)item {
+  return [super validateUserInterfaceItem:item];
+}
+
 - (void)commandDispatch:(id)sender {
-  [commandHandler_ commandDispatch:sender window:self];
+  [commandDispatcher_ dispatch:sender forHandler:commandHandler_];
 }
 
 - (void)commandDispatchUsingKeyModifiers:(id)sender {
-  [commandHandler_ commandDispatchUsingKeyModifiers:sender window:self];
+  [commandDispatcher_ dispatchUsingKeyModifiers:sender
+                                     forHandler:commandHandler_];
 }
 
 // NSWindow overrides (NSUserInterfaceItemValidations implementation)
 
 - (BOOL)validateUserInterfaceItem:(id<NSValidatedUserInterfaceItem>)item {
-  // Since this class implements these selectors, |super| will always say they
-  // are enabled. Only use [super] to validate other selectors. If there is no
-  // command handler, defer to AppController.
-  if ([item action] == @selector(commandDispatch:) ||
-      [item action] == @selector(commandDispatchUsingKeyModifiers:)) {
-    if (commandHandler_)
-      return [commandHandler_ validateUserInterfaceItem:item window:self];
-
-    id appController = [NSApp delegate];
-    DCHECK([appController
-        conformsToProtocol:@protocol(NSUserInterfaceValidations)]);
-    return [appController validateUserInterfaceItem:item];
-  }
-
-  return [super validateUserInterfaceItem:item];
+  return [commandDispatcher_ validateUserInterfaceItem:item
+                                            forHandler:commandHandler_];
 }
 
 @end