Remove ContextMenuController.

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

-// 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.
-
-#import "ios/chrome/browser/ui/context_menu/context_menu_holder.h"
-
-#import "base/logging.h"
-#import "base/mac/scoped_nsobject.h"
-
-@implementation ContextMenuHolder {
-  // Backs the property of the same name.
-  base::scoped_nsobject<NSString> _menuTitle;
-  // Stores the itemTitles of the menu items.
-  base::scoped_nsobject<NSMutableArray> _itemTitles;
-  // Keep a copy of all the actions blocks.
-  base::scoped_nsobject<NSMutableArray> _actions;
-  // A set of indices in |_actions| that should cause the context menu to be
-  // dismissed without animation when tapped.
-  base::scoped_nsobject<NSMutableIndexSet> _dismissImmediatelyActions;
-}
-
-- (instancetype)init {
-  self = [super init];
-  if (self) {
-    _itemTitles.reset([[NSMutableArray alloc] init]);
-    _actions.reset([[NSMutableArray alloc] init]);
-    _dismissImmediatelyActions.reset([[NSMutableIndexSet alloc] init]);
-  }
-  return self;
-}
-
-- (NSString*)menuTitle {
-  return _menuTitle;
-}
-
-- (void)setMenuTitle:(NSString*)newTitle {
-  _menuTitle.reset([newTitle copy]);
-}
-
-- (NSArray*)itemTitles {
-  return [[_itemTitles copy] autorelease];
-}
-
-- (NSUInteger)itemCount {
-  return [_itemTitles count];
-}
-
-- (void)appendItemWithTitle:(NSString*)title action:(ProceduralBlock)action {
-  [self appendItemWithTitle:title action:action dismissImmediately:NO];
-}
-
-- (void)appendItemWithTitle:(NSString*)title
-                     action:(ProceduralBlock)action
-         dismissImmediately:(BOOL)dismissImmediately {
-  DCHECK(title && action);
-  [_itemTitles addObject:title];
-  // The action block needs to receive the copy message in order to freeze the
-  // stack data it uses. Only then can it be safely retained by the array.
-  base::scoped_nsprotocol<id> heapAction([action copy]);
-  [_actions addObject:heapAction];
-  if (dismissImmediately) {
-    [_dismissImmediatelyActions addIndex:[_actions count] - 1];
-  }
-}
-
-- (void)performActionAtIndex:(NSUInteger)index {
-  static_cast<ProceduralBlock>([_actions objectAtIndex:index])();
-}
-
-- (BOOL)shouldDismissImmediatelyOnClickedAtIndex:(NSUInteger)index {
-  return [_dismissImmediatelyActions containsIndex:index];
-}
-
-@end