Remove ContextMenuController.

ios/chrome/browser/ui/context_menu/context_menu_holder.h

-// Copyright 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.
-
-#ifndef IOS_CHROME_BROWSER_UI_CONTEXT_MENU_CONTEXT_MENU_HOLDER_H_
-#define IOS_CHROME_BROWSER_UI_CONTEXT_MENU_CONTEXT_MENU_HOLDER_H_
-
-#import <Foundation/Foundation.h>
-
-#include "base/ios/block_types.h"
-
-// This class simply stores the information necessary to build a menu:
-// a menu title, a list of item titles and associated actions (blocks).
-@interface ContextMenuHolder : NSObject
-
-// Designated initializer.
-- (instancetype)init;
-
-// Menu title; can be nil.
-@property(nonatomic, copy) NSString* menuTitle;
-
-// A list of menu item titles in the order they will appear in the menu.
-@property(nonatomic, readonly, copy) NSArray* itemTitles;
-
-// A number of menu items.
-@property(nonatomic, readonly) NSUInteger itemCount;
-
-// Adds an item at the end of the menu.
-- (void)appendItemWithTitle:(NSString*)title action:(ProceduralBlock)action;
-
-// Adds an item at the end of the menu. If |dismissImmediately| is YES,
-// then tapping this item will cause the context menu to be dismissed without
-// any animation.
-- (void)appendItemWithTitle:(NSString*)title
-                     action:(ProceduralBlock)action
-         dismissImmediately:(BOOL)dismissImmediately;
-
-// Performs the action for the item at the given index.
-- (void)performActionAtIndex:(NSUInteger)index;
-
-// Returns YES if the action at |index| should cause the context menu to
-// dismiss without any animation.
-- (BOOL)shouldDismissImmediatelyOnClickedAtIndex:(NSUInteger)index;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_CONTEXT_MENU_CONTEXT_MENU_HOLDER_H_