[Mac] Move UI item validation to UserInterfaceItemCommandHandler.

chrome/browser/ui/cocoa/chrome_event_processing_window.mm

 // Copyright (c) 2012 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 "chrome/browser/ui/cocoa/chrome_event_processing_window.h"
 
 #include "base/logging.h"
 #import "chrome/browser/ui/cocoa/chrome_command_dispatcher_delegate.h"
 
 @implementation ChromeEventProcessingWindow {
@@ skipping 27 matching lines @@
 // CommandDispatchingWindow implementation.
 
 - (BOOL)redispatchKeyEvent:(NSEvent*)event {
   return [commandDispatcher_ redispatchKeyEvent:event];
 }
 
 - (BOOL)defaultPerformKeyEquivalent:(NSEvent*)event {
   return [super performKeyEquivalent:event];
 }
 
+- (void)commandDispatch:(id)sender {
+  [commandDispatcherDelegate_ commandDispatch:sender window:self];
+}
+
+- (void)commandDispatchUsingKeyModifiers:(id)sender {
+  [commandDispatcherDelegate_ commandDispatchUsingKeyModifiers:sender
+                                                        window:self];
+}
+
 // NSWindow overrides.
 
 - (BOOL)performKeyEquivalent:(NSEvent*)event {
   return [commandDispatcher_ performKeyEquivalent:event];
 }
 
 - (void)sendEvent:(NSEvent*)event {
   if (![commandDispatcher_ preSendEvent:event])
     [super sendEvent:event];
 }
 
+// NSWindow overrides (NSUserInterfaceValidations implementation).
+
+- (BOOL)validateUserInterfaceItem:(id<NSValidatedUserInterfaceItem>)item {
+  return
+      [commandDispatcherDelegate_ validateUserInterfaceItem:item window:self] &&
+      [super validateUserInterfaceItem:item];
+}
+
 @end  // ChromeEventProcessingWindow