[ios clean] Creates ToolsMenu model.

ios/clean/chrome/browser/ui/tools/tools_menu_model.h

+// 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.
+
+#ifndef IOS_CLEAN_CHROME_BROWSER_UI_TOOLS_TOOLS_MENU_MODEL_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_TOOLS_TOOLS_MENU_MODEL_H_
+
+#import <Foundation/Foundation.h>
+
+// Total number of possible menu items.
+const int kToolsMenuNumberOfItems = 16;

[lpromero, 2017/05/23 09:00:44]

Can't this be possibly computed from |itemsModelList|? Also, how come it is not
just declared here and defined in the implementation?

[sczs, 2017/05/23 20:28:18]

This constant is only used here in the header so we can initialize the Array. 
I'm using the sizeOfArray macro on the mediator in order to get the Array size.

I tried hiding this on the implementation file but I can't use the macro.

+
+// Struct for a single MenuModelItem.
+struct MenuModelItem {
+  // Item Title ID.
+  int title_id;
+  // Item Accessibility ID.
+  NSString* accessibility_id;
+  // The ToolbarType on which the item is visible.
+  int toolbar_types;
+  // |visibility| is applied if a menu item is included for a given
+  // |toolbar_types|. A value of 0 means the menu item is always visible for
+  // the given |toolbar_types|.
+  int visibility;
+  // The selector name which will be called on the dispatcher, when the
+  // item is selected.
+  NSString* selector;
+};
+
+// Menu items can be marked as visible or not when Incognito is enabled.
+// The following bits are used for |visibility| field in |MenuItemInfo|.
+const NSInteger kVisibleAlways = 0;

[lpromero, 2017/05/23 09:00:44]

Why isn't this an NS_OPTIONS too?

[sczs, 2017/05/23 20:28:18]

You're right got too stuck on the previous Model and didn't changed this.
Done.

+const NSInteger kVisibleIncognitoOnly = 1 << 0;
+const NSInteger kVisibleNotIncognitoOnly = 1 << 1;
+
+// Flags for different toolbar types.
+typedef NS_OPTIONS(NSUInteger, ToolbarType) {
+  // clang-format off
+  ToolbarTypeNone            = 0,
+  ToolbarTypeWeb             = 1 << 0,
+  ToolbarTypeSwitcher        = 1 << 1,
+  ToolbarTypeAll             = ToolbarTypeWeb | ToolbarTypeSwitcher,
+  // clang-format on
+};
+
+// All possible items.
+extern const MenuModelItem itemsModelList[kToolsMenuNumberOfItems];
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_TOOLS_TOOLS_MENU_MODEL_H_