[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;
+}
+
+// Convenience initializer for use by the factory method.
+- (instancetype)initWithTitle:(NSString*)title
+                     commands:(const std::vector<SEL>&)commands;
+
+@end
+
+@implementation ContextMenuItem
+
+@synthesize title = _title;
+
+- (instancetype)initWithTitle:(NSString*)title
+                     commands:(const std::vector<SEL>&)commands {
+  if ((self = [super init])) {
+    _title = [title copy];
+    _commands = commands;
+  }
+  return self;
+}
+
+#pragma mark - Accessors
+
+- (const std::vector<SEL>&)commands {
+  return _commands;
+}
+
+#pragma mark - Public
+
++ (instancetype)itemWithTitle:(NSString*)title
+                     commands:(const std::vector<SEL>&)commands {
+  return [[ContextMenuItem alloc] initWithTitle:title commands:commands];
+}
+
+@end