[ObjC ARC] Converts ios/chrome/browser/ui/bookmarks/bars:bars to ARC.

ios/chrome/browser/ui/bookmarks/bars/bookmark_navigation_bar.mm

 // Copyright 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/bookmarks/bars/bookmark_navigation_bar.h"
 
 #import <QuartzCore/QuartzCore.h>
-
-#include "base/mac/objc_property_releaser.h"
-#include "base/mac/scoped_nsobject.h"
 #import "ios/chrome/browser/ui/bookmarks/bookmark_extended_button.h"
 #import "ios/chrome/browser/ui/bookmarks/bookmark_utils_ios.h"
 #import "ios/chrome/browser/ui/rtl_geometry.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
 #include "ui/base/l10n/l10n_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 const CGFloat kButtonHeight = 24;
 const CGFloat kButtonWidth = 24;
 
 // The height of the content, not including possible extra space for the status
 // bar.
 const CGFloat kContentHeight = 56;
 // The distance between buttons.
 const CGFloat kInterButtonMargin = 24;
 };  // namespace
 
-@interface BookmarkNavigationBar () {
-  base::mac::ObjCPropertyReleaser _propertyReleaser_BookmarkNavigationBar;
-}
-@property(nonatomic, retain) BookmarkExtendedButton* cancelButton;
+@interface BookmarkNavigationBar ()
+
+@property(nonatomic, strong) BookmarkExtendedButton* cancelButton;
 // All subviews are added to |contentView|, which allows easy repositioning of
 // the content to account for iOS 6 and iOS 7+ layout differences.
-@property(nonatomic, retain) UIView* contentView;
-@property(nonatomic, retain) BookmarkExtendedButton* backButton;
-@property(nonatomic, retain) BookmarkExtendedButton* editButton;
-@property(nonatomic, retain) BookmarkExtendedButton* menuButton;
-@property(nonatomic, retain) UILabel* titleLabel;
+@property(nonatomic, strong) UIView* contentView;
+@property(nonatomic, strong) BookmarkExtendedButton* backButton;
+@property(nonatomic, strong) BookmarkExtendedButton* editButton;
+@property(nonatomic, strong) BookmarkExtendedButton* menuButton;
+@property(nonatomic, strong) UILabel* titleLabel;
 @end
 
 @implementation BookmarkNavigationBar
 @synthesize backButton = _backButton;
 @synthesize cancelButton = _cancelButton;
 @synthesize contentView = _contentView;
 @synthesize editButton = _editButton;
 @synthesize menuButton = _menuButton;
 @synthesize titleLabel = _titleLabel;
 
 - (id)initWithFrame:(CGRect)outerFrame {
   self = [super initWithFrame:outerFrame];
   if (self) {
-    _propertyReleaser_BookmarkNavigationBar.Init(self,
-                                                 [BookmarkNavigationBar class]);
-
     self.backgroundColor = bookmark_utils_ios::mainBackgroundColor();
     self.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin |
                             UIViewAutoresizingFlexibleWidth;
 
     // Position the content view at the bottom of |self|.
     CGFloat contentY = CGRectGetHeight(outerFrame) - kContentHeight;
-    self.contentView = base::scoped_nsobject<UIView>([[UIView alloc]
+    self.contentView = [[UIView alloc]
         initWithFrame:CGRectMake(0, contentY, CGRectGetWidth(outerFrame),
-                                 kContentHeight)]);
+                                 kContentHeight)];
     [self addSubview:self.contentView];
     self.contentView.backgroundColor = [UIColor clearColor];
     self.contentView.autoresizingMask =
         UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth;
     CGRect contentViewBounds = self.contentView.bounds;
 
-    base::scoped_nsobject<UILabel> label([[UILabel alloc] init]);
+    UILabel* label = [[UILabel alloc] init];
     self.titleLabel = label;
     self.titleLabel.textColor = [UIColor colorWithWhite:68 / 255.0 alpha:1.0];
     self.titleLabel.backgroundColor = [UIColor clearColor];
     self.titleLabel.font = [MDCTypography titleFont];
     [self.contentView addSubview:self.titleLabel];
 
     // The buttons should be on the right side of the screen.
     CGFloat buttonVerticalMargin =
         floor((CGRectGetHeight(contentViewBounds) - kButtonHeight) / 2);
     CGFloat buttonSideMargin = buttonVerticalMargin;
     if (IsIPadIdiom())
       buttonSideMargin = kInterButtonMargin;
 
     CGFloat buttonX = CGRectGetWidth(contentViewBounds) - buttonSideMargin;
 
     if (!IsIPadIdiom()) {
-      base::scoped_nsobject<BookmarkExtendedButton> button(
-          [[BookmarkExtendedButton alloc] initWithFrame:CGRectZero]);
+      BookmarkExtendedButton* button =
+          [[BookmarkExtendedButton alloc] initWithFrame:CGRectZero];
 
       self.cancelButton = button;
       self.cancelButton.autoresizingMask =
           UIViewAutoresizingFlexibleLeadingMargin();
       self.cancelButton.backgroundColor = [UIColor clearColor];
       [self.cancelButton
           setTitle:l10n_util::GetNSString(IDS_IOS_NAVIGATION_BAR_DONE_BUTTON)
                        .uppercaseString
           forState:UIControlStateNormal];
       [self.cancelButton
@@ skipping 20 matching lines @@
       buttonX = buttonX - kInterButtonMargin;
     }
 
     CGRect buttonFrame = LayoutRectGetRect(
         LayoutRectMake(buttonX - kButtonWidth, CGRectGetWidth(self.bounds),
                        buttonVerticalMargin, kButtonWidth, kButtonHeight));
     UIEdgeInsets buttonInsets =
         UIEdgeInsetsMake(buttonVerticalMargin, kInterButtonMargin / 2.0,
                          buttonVerticalMargin, kInterButtonMargin / 2.0);
 
-    base::scoped_nsobject<BookmarkExtendedButton> editButton(
-        [[BookmarkExtendedButton alloc] initWithFrame:buttonFrame]);
+    BookmarkExtendedButton* editButton =
+        [[BookmarkExtendedButton alloc] initWithFrame:buttonFrame];
     self.editButton = editButton;
     self.editButton.extendedEdges = buttonInsets;
     self.editButton.autoresizingMask =
         UIViewAutoresizingFlexibleLeadingMargin();
     self.editButton.backgroundColor = [UIColor clearColor];
     UIImage* editImage = [UIImage imageNamed:@"bookmark_gray_edit"];
     [self.editButton setBackgroundImage:editImage
                                forState:UIControlStateNormal];
     self.editButton.accessibilityLabel =
         l10n_util::GetNSString(IDS_IOS_BOOKMARK_NEW_EDIT_BUTTON_LABEL);
     self.editButton.accessibilityIdentifier = @"Edit_navigation_bar";
     [self.contentView addSubview:self.editButton];
 
     CGRect leftButtonFrame = LayoutRectGetRect(
         LayoutRectMake(buttonSideMargin, CGRectGetWidth(self.bounds),
                        buttonVerticalMargin, kButtonWidth, kButtonHeight));
     UIEdgeInsets leftButtonInsets =
         UIEdgeInsetsMake(buttonVerticalMargin, buttonSideMargin,
                          buttonVerticalMargin, buttonSideMargin);
 
-    base::scoped_nsobject<BookmarkExtendedButton> menuButton(
-        [[BookmarkExtendedButton alloc] initWithFrame:leftButtonFrame]);
+    BookmarkExtendedButton* menuButton =
+        [[BookmarkExtendedButton alloc] initWithFrame:leftButtonFrame];
     self.menuButton = menuButton;
     self.menuButton.extendedEdges = leftButtonInsets;
     self.menuButton.autoresizingMask =
         UIViewAutoresizingFlexibleTrailingMargin();
     self.menuButton.backgroundColor = [UIColor clearColor];
     UIImage* menuImage = [UIImage imageNamed:@"bookmark_gray_menu"];
     [self.menuButton setBackgroundImage:menuImage
                                forState:UIControlStateNormal];
     self.menuButton.accessibilityLabel =
         l10n_util::GetNSString(IDS_IOS_BOOKMARK_NEW_MENU_LABEL);
     self.menuButton.accessibilityIdentifier = @"Menu";
     [self.contentView addSubview:self.menuButton];
     self.menuButton.hidden = YES;
-    base::scoped_nsobject<BookmarkExtendedButton> backButton(
-        [[BookmarkExtendedButton alloc] initWithFrame:leftButtonFrame]);
+    BookmarkExtendedButton* backButton =
+        [[BookmarkExtendedButton alloc] initWithFrame:leftButtonFrame];
     self.backButton = backButton;
     self.backButton.extendedEdges = leftButtonInsets;
     self.backButton.autoresizingMask =
         UIViewAutoresizingFlexibleTrailingMargin();
     self.backButton.backgroundColor = [UIColor clearColor];
     UIImage* backImage = [UIImage imageNamed:@"bookmark_gray_back"];
     [self.backButton setBackgroundImage:backImage
                                forState:UIControlStateNormal];
     self.backButton.accessibilityLabel =
         l10n_util::GetNSString(IDS_IOS_BOOKMARK_NEW_BACK_LABEL);
@@ skipping 171 matching lines @@
         self.backButton.alpha = 1.0;
       }
       completion:^(BOOL finished) {
         if (finished) {
           [self setNeedsLayout];
         }
       }];
 }
 
 @end