Add context menu for ContentSuggestions

ios/chrome/browser/ui/content_suggestions/content_suggestions_article_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/chrome/browser/ui/content_suggestions/content_suggestions_article_item.h"
 
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 const CGFloat kImageSize = 100;
 const CGFloat kStandardSpacing = 8;
 }
 
 @interface ContentSuggestionsArticleItem ()
 
-@property(nonatomic, copy) NSString* title;
 @property(nonatomic, copy) NSString* subtitle;
 
 @end
 
 #pragma mark - ContentSuggestionsArticleItem
 
 @implementation ContentSuggestionsArticleItem
 
 @synthesize title = _title;
 @synthesize subtitle = _subtitle;
@@ skipping 89 matching lines @@
   // changes, for instance on screen rotation.
   CGFloat parentWidth = CGRectGetWidth(self.contentView.bounds);
   self.subtitleLabel.preferredMaxLayoutWidth = parentWidth - kImageSize - 3 * 8;
 
   // Re-layout with the new preferred width to allow the label to adjust its
   // height.
   [super layoutSubviews];
 }
 
 @end