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

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

 // 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.
 
 #import "ios/chrome/browser/ui/omnibox/omnibox_popup_material_row.h"
 
 #include "base/logging.h"
-#include "base/mac/objc_property_releaser.h"
+
 #import "ios/chrome/browser/ui/omnibox/truncating_attributed_label.h"
 #include "ios/chrome/browser/ui/rtl_geometry.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #include "ios/chrome/grit/ios_theme_resources.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 const CGFloat kImageDimensionLength = 19.0;
 const CGFloat kLeadingPaddingIpad = 164;
 const CGFloat kLeadingPaddingIpadCompact = 71;
 const CGFloat kAppendButtonTrailingMargin = 4;
 const CGFloat kAppendButtonSize = 48.0;
 }
 
 @interface OmniboxPopupMaterialRow () {
   BOOL _incognito;
-  base::mac::ObjCPropertyReleaser _propertyReleaser_OmniboxPopupMaterialRow;
 }
 
 // Set the append button normal and highlighted images.
 - (void)updateAppendButtonImages;
 
 @end
 
 @implementation OmniboxPopupMaterialRow
 
 @synthesize textTruncatingLabel = _textTruncatingLabel;
 @synthesize detailTruncatingLabel = _detailTruncatingLabel;
 @synthesize appendButton = _appendButton;
 @synthesize answerImageView = _answerImageView;
 @synthesize imageView = _imageView;
 @synthesize rowHeight = _rowHeight;
 
 - (instancetype)initWithStyle:(UITableViewCellStyle)style
               reuseIdentifier:(NSString*)reuseIdentifier {
   return [self initWithIncognito:NO];
 }
 
 - (instancetype)initWithIncognito:(BOOL)incognito {
   self = [super initWithStyle:UITableViewCellStyleDefault
               reuseIdentifier:@"OmniboxPopupMaterialRow"];
   if (self) {
     self.isAccessibilityElement = YES;
     self.backgroundColor = [UIColor clearColor];
     _incognito = incognito;
-    _propertyReleaser_OmniboxPopupMaterialRow.Init(
-        self, [OmniboxPopupMaterialRow class]);
 
     _textTruncatingLabel =
         [[OmniboxPopupTruncatingLabel alloc] initWithFrame:CGRectZero];
     _textTruncatingLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth;
     _textTruncatingLabel.userInteractionEnabled = NO;
     [self addSubview:_textTruncatingLabel];
 
     _detailTruncatingLabel =
         [[OmniboxPopupTruncatingLabel alloc] initWithFrame:CGRectZero];
     _detailTruncatingLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth;
     _detailTruncatingLabel.userInteractionEnabled = NO;
     [self addSubview:_detailTruncatingLabel];
 
-    _appendButton = [[UIButton buttonWithType:UIButtonTypeCustom] retain];
+    _appendButton = [UIButton buttonWithType:UIButtonTypeCustom];
     [_appendButton setContentMode:UIViewContentModeRight];
     [self updateAppendButtonImages];
     // TODO(justincohen): Consider using the UITableViewCell's accessory view.
     // The current implementation is from before using a UITableViewCell.
     [self addSubview:_appendButton];
 
     // Leading icon is only displayed on iPad.
     if (IsIPadIdiom()) {
       _imageView = [[UIImageView alloc] initWithFrame:CGRectZero];
       _imageView.userInteractionEnabled = NO;
@@ skipping 81 matching lines @@
 
 - (NSString*)accessibilityLabel {
   return _textTruncatingLabel.attributedText.string;
 }
 
 - (NSString*)accessibilityValue {
   return _detailTruncatingLabel.attributedText.string;
 }
 
 @end