[iOS Clean] Wired up ContextMenuCommands.

ios/clean/chrome/browser/ui/context_menu/context_menu_item.mm

+// Copyright 2017 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 "ios/clean/chrome/browser/ui/context_menu/context_menu_item.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@interface ContextMenuItem () {
+  // Backing object for |commands|.
+  std::vector<SEL> _commands;
+}
+
+@end
+
+@implementation ContextMenuItem
+
+@synthesize title = _title;
+
++ (instancetype)itemWithTitle:(NSString*)title
+                     commands:(const std::vector<SEL>&)commands {
+  ContextMenuItem* item = [[self alloc] init];
+  item->_title = [title copy];

[edchin, 2017/05/25 21:41:53]

Could you incorporate the dot notation over pointer? It's more idiomatic to
ObjC. 

[kkhorimoto, 2017/05/26 23:20:09]

That would require redefining the property as readwrite in the implementation
file.  Rather than doing that, I created a private initializer that sets the
ivars backing the readonly properties.

[edchin, 2017/05/27 15:59:03]

Yup. This looks more ObjC-y.

+  item->_commands = commands;
+  return item;
+}
+
+#pragma mark - Accessors
+
+- (const std::vector<SEL>&)commands {
+  return _commands;
+}
+
+@end