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

ios/chrome/browser/ui/elements/selector_picker_view_controller.mm

 // Copyright 2016 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/elements/selector_picker_view_controller.h"
 
 #import "ios/chrome/browser/ui/elements/selector_view_controller_delegate.h"
 #include "base/logging.h"
-#import "base/mac/objc_property_releaser.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
 
 namespace {
 // Font size of text in the picker view.
 CGFloat kUIPickerFontSize = 26;
 }  // namespace
 
 @interface SelectorPickerViewController ()<UIPickerViewDelegate,
                                            UIPickerViewDataSource> {
-  base::mac::ObjCPropertyReleaser
-      _propertyReleaser_SelectorPickerViewController;
   __unsafe_unretained id<SelectorViewControllerDelegate> _delegate;
 }
 // Options to display.
 @property(nonatomic, copy) NSOrderedSet<NSString*>* options;
 // The default option.
 @property(nonatomic, copy) NSString* defaultOption;
 // The displayed UINavigationBar. Exposed for testing.
-@property(nonatomic, retain) UINavigationBar* navigationBar;
+@property(nonatomic, strong) UINavigationBar* navigationBar;
 // The displayed UIPickerView. Exposed for testing.
-@property(nonatomic, retain) UIPickerView* pickerView;
+@property(nonatomic, strong) UIPickerView* pickerView;
 // Action for the "Done" button.
 - (void)doneButtonPressed;
 // Action for the "Cancel" button.
 - (void)cancelButtonPressed;
 @end
 
 @implementation SelectorPickerViewController
 
 @synthesize pickerView = _pickerView;
 @synthesize navigationBar = _navigationBar;
 
 @synthesize options = _options;
 @synthesize defaultOption = _defaultOption;
 
 - (instancetype)initWithOptions:(NSOrderedSet<NSString*>*)options
                         default:(NSString*)defaultOption {
   self = [super initWithNibName:nil bundle:nil];
   if (self) {
-    _propertyReleaser_SelectorPickerViewController.Init(
-        self, [SelectorPickerViewController class]);
+    _defaultOption = [defaultOption copy];
     _options = [options copy];
-    _defaultOption = [defaultOption copy];
   }
   return self;
 }
 
 - (instancetype)initWithNibName:(NSString*)nibName bundle:(NSBundle*)nibBundle {
   NOTREACHED();
   return nil;
 }
 
 - (instancetype)initWithCoder:(NSCoder*)aDecoder {
   NOTREACHED();
   return nil;
 }
 
 - (void)loadView {
-  self.pickerView =
-      [[[UIPickerView alloc] initWithFrame:CGRectZero] autorelease];
-  self.navigationBar =
-      [[[UINavigationBar alloc] initWithFrame:CGRectZero] autorelease];
+  self.pickerView = [[UIPickerView alloc] initWithFrame:CGRectZero];
+  self.navigationBar = [[UINavigationBar alloc] initWithFrame:CGRectZero];
   self.pickerView.translatesAutoresizingMaskIntoConstraints = NO;
   self.navigationBar.translatesAutoresizingMaskIntoConstraints = NO;
-  UIStackView* stackView = [[[UIStackView alloc]
-      initWithArrangedSubviews:@[ self.navigationBar, self.pickerView ]]
-      autorelease];
+  UIStackView* stackView = [[UIStackView alloc]
+      initWithArrangedSubviews:@[ self.navigationBar, self.pickerView ]];
   stackView.axis = UILayoutConstraintAxisVertical;
   self.view = stackView;
 }
 
 - (void)viewDidLoad {
   [super viewDidLoad];
   self.view.backgroundColor = [UIColor whiteColor];
 
   self.pickerView.showsSelectionIndicator = YES;
   self.pickerView.backgroundColor = [UIColor whiteColor];
   self.pickerView.delegate = self;
   self.pickerView.dataSource = self;
   NSInteger initialIndex = [self.options indexOfObject:self.defaultOption];
   if (initialIndex != NSNotFound) {
     [self.pickerView selectRow:initialIndex inComponent:0 animated:NO];
   }
 
   UINavigationItem* navigationItem =
-      [[[UINavigationItem alloc] initWithTitle:@""] autorelease];
-  UIBarButtonItem* doneButton = [[[UIBarButtonItem alloc]
+      [[UINavigationItem alloc] initWithTitle:@""];
+  UIBarButtonItem* doneButton = [[UIBarButtonItem alloc]
       initWithBarButtonSystemItem:UIBarButtonSystemItemDone
                            target:self
-                           action:@selector(doneButtonPressed)] autorelease];
-  UIBarButtonItem* cancelButton = [[[UIBarButtonItem alloc]
+                           action:@selector(doneButtonPressed)];
+  UIBarButtonItem* cancelButton = [[UIBarButtonItem alloc]
       initWithBarButtonSystemItem:UIBarButtonSystemItemCancel
                            target:self
-                           action:@selector(cancelButtonPressed)] autorelease];
+                           action:@selector(cancelButtonPressed)];
   [navigationItem setRightBarButtonItem:doneButton];
   [navigationItem setLeftBarButtonItem:cancelButton];
   [navigationItem setHidesBackButton:YES];
   [self.navigationBar pushNavigationItem:navigationItem animated:NO];
 }
 
 - (id<SelectorViewControllerDelegate>)delegate {
   return _delegate;
 }
 
@@ skipping 13 matching lines @@
 }
 
 #pragma mark UIPickerViewDelegate
 
 - (UIView*)pickerView:(UIPickerView*)pickerView
            viewForRow:(NSInteger)row
          forComponent:(NSInteger)component
           reusingView:(UIView*)view {
   DCHECK_EQ(0, component);
   UILabel* label = [view isKindOfClass:[UILabel class]]
                        ? (UILabel*)view

[sdefresne, 2016/12/12 19:22:34]

Please change this to ObjCCastStrict<UILabel>(view)

[stkhapugin, 2016/12/13 13:08:30]

Done.

-                       : [[[UILabel alloc] init] autorelease];
+                       : [[UILabel alloc] init];
   NSString* text = self.options[row];
   label.text = text;
   label.textAlignment = NSTextAlignmentCenter;
   label.font = [text isEqualToString:self.defaultOption]
                    ? [UIFont boldSystemFontOfSize:kUIPickerFontSize]
                    : [UIFont systemFontOfSize:kUIPickerFontSize];
   return label;
 }
 
 #pragma mark Private methods
 
 - (void)doneButtonPressed {
   NSInteger selectedIndex = [self.pickerView selectedRowInComponent:0];
   [_delegate selectorViewController:self
                     didSelectOption:self.options[selectedIndex]];
 }
 
 - (void)cancelButtonPressed {
   [_delegate selectorViewController:self didSelectOption:self.defaultOption];
 }
 
 @end