[ObjC ARC] Converts ios/chrome/browser/ui/omnibox:omnibox_internal to ARC.

ios/chrome/browser/ui/omnibox/omnibox_popup_material_row.h

 // Copyright (c) 2014 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_OMNIBOX_OMNIBOX_POPUP_MATERIAL_ROW_H_
 #define IOS_CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_POPUP_MATERIAL_ROW_H_
 
 #import <UIKit/UIKit.h>
 
 @class OmniboxPopupTruncatingLabel;
 
 // View used to display an omnibox autocomplete match in the omnibox popup.
 @interface OmniboxPopupMaterialRow : UITableViewCell
 
 // A truncating version of the textLabel of a UITableViewCell.
-@property(nonatomic, readonly, retain)
+@property(nonatomic, readonly, strong)
     OmniboxPopupTruncatingLabel* textTruncatingLabel;
 // A truncating version of the detailTextLabel of a UITableViewCell.
-@property(nonatomic, readonly, retain)
+@property(nonatomic, readonly, strong)
     OmniboxPopupTruncatingLabel* detailTruncatingLabel;
-@property(nonatomic, readonly, retain) UIImageView* imageView;
-@property(nonatomic, readonly, retain) UIImageView* answerImageView;
-@property(nonatomic, readonly, retain) UIButton* appendButton;
+@property(nonatomic, readonly, strong) UIImageView* imageView;
+@property(nonatomic, readonly, strong) UIImageView* answerImageView;
+@property(nonatomic, readonly, strong) UIButton* appendButton;
 @property(nonatomic, assign) CGFloat rowHeight;
 
 // Initialize the row with the given incognito state. The colors and styling are
 // dependent on whether or not the row is displayed in incognito mode.
 - (instancetype)initWithIncognito:(BOOL)incognito;
 
 // Update the match type icon with the supplied image ID and adjust its position
 // based on the current size of the row.
 - (void)updateLeadingImage:(int)imageID;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_POPUP_MATERIAL_ROW_H_