[ObjC ARC] Converts ios/chrome/today_extension:today_extension to ARC.

ios/chrome/today_extension/interactive_label.mm

 // Copyright 2015 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/today_extension/interactive_label.h"
 
 #import "base/mac/scoped_block.h"
 #import "base/mac/scoped_nsobject.h"
 #import "ios/chrome/common/string_util.h"
 #include "ios/chrome/today_extension/transparent_button.h"
@@ skipping 16 matching lines @@
 - (BOOL)canBecomeFirstResponder {
   return NO;
 }
 
 @end
 
 @implementation InteractiveLabel {
   base::scoped_nsobject<NSString> _labelString;
   base::scoped_nsobject<NSString> _buttonString;
   base::scoped_nsobject<UITextView> _label;
-  base::mac::ScopedBlock<ProceduralBlock> _linkBlock;
-  base::mac::ScopedBlock<ProceduralBlock> _buttonBlock;
+  ProceduralBlock _linkBlock;
+  ProceduralBlock _buttonBlock;
   base::scoped_nsobject<TransparentButton> _activationButton;
   NSRange _buttonRange;
   base::scoped_nsobject<NSMutableAttributedString> _attributedText;
   UIEdgeInsets _insets;
   CGFloat _currentWidth;
 
   // These constraints set the position of the button inside
   base::scoped_nsobject<NSLayoutConstraint> _buttonTopConstraint;
   base::scoped_nsobject<NSLayoutConstraint> _buttonLeftConstraint;
   base::scoped_nsobject<NSLayoutConstraint> _buttonHeightConstraint;
@@ skipping 11 matching lines @@
   self = [super initWithFrame:frame];
   if (self) {
     _insets = insets;
     _currentWidth = frame.size.width;
     // When the first character of the UITextView text as a NSLinkAttributeName
     // attribute, the lineSpacing attribute of the paragraph style is ignored.
     // Add a zero width space so the first character is never in a link.
     NSString* prefixedString =
         [NSString stringWithFormat:@"\u200B%@", labelString];
     _labelString.reset([prefixedString copy]);
-    _linkBlock.reset(linkBlock, base::scoped_policy::RETAIN);
+    _linkBlock = [linkBlock copy];
 
     _label.reset([[NoSelectionUITextView alloc] initWithFrame:CGRectZero]);
     [_label setTranslatesAutoresizingMaskIntoConstraints:NO];
     [_label setDelegate:self];
     [_label setBackgroundColor:[UIColor clearColor]];
     [_label setSelectable:YES];
     [_label setEditable:NO];
     // We want to get rid of the padding of the text in the UITextView.
     [_label setTextContainerInset:UIEdgeInsetsZero];
     [[_label textContainer] setLineFragmentPadding:0];
@@ skipping 11 matching lines @@
 
     NSRange linkRange;
     NSString* text = ParseStringWithLink(_labelString, &linkRange);
     [_label setAccessibilityTraits:[_label accessibilityTraits] |
                                    UIAccessibilityTraitStaticText];
     NSString* buttonText = nil;
     _buttonRange = NSMakeRange(0, 0);
     BOOL showButton = buttonString && buttonBlock;
     if (showButton) {
       _buttonString.reset([buttonString copy]);
-      _buttonBlock.reset(buttonBlock, base::scoped_policy::RETAIN);
+      _buttonBlock = [buttonBlock copy];
       _activationButton.reset(
           [[TransparentButton alloc] initWithFrame:CGRectZero]);
       [_activationButton addTarget:self
                             action:@selector(buttonPressed:)
                   forControlEvents:UIControlEventTouchUpInside];
       [_activationButton setBackgroundColor:[UIColor clearColor]];
       [_activationButton setInkColor:ui_util::InkColor()];
       [_activationButton setCornerRadius:2];
       [_activationButton setBorderWidth:1];
       [_activationButton setBorderColor:ui_util::BorderColor()];
       [self addSubview:_activationButton];
       [self bringSubviewToFront:_activationButton];
-      _buttonTopConstraint.reset([[[_activationButton topAnchor]
-          constraintEqualToAnchor:[self topAnchor]] retain]);
-      _buttonLeftConstraint.reset([[[_activationButton leftAnchor]
-          constraintEqualToAnchor:[self leftAnchor]] retain]);
-      _buttonWidthConstraint.reset([[[_activationButton widthAnchor]
-          constraintEqualToConstant:0] retain]);
-      _buttonHeightConstraint.reset([[[_activationButton heightAnchor]
-          constraintEqualToConstant:0] retain]);
+      _buttonTopConstraint.reset([[_activationButton topAnchor]
+          constraintEqualToAnchor:[self topAnchor]]);
+      _buttonLeftConstraint.reset([[_activationButton leftAnchor]
+          constraintEqualToAnchor:[self leftAnchor]]);
+      _buttonWidthConstraint.reset(
+          [[_activationButton widthAnchor] constraintEqualToConstant:0]);
+      _buttonHeightConstraint.reset(
+          [[_activationButton heightAnchor] constraintEqualToConstant:0]);
       [NSLayoutConstraint activateConstraints:@[
         _buttonTopConstraint, _buttonLeftConstraint, _buttonWidthConstraint,
         _buttonHeightConstraint
       ]];
 
       // Add two spaces before and after the button label to add padding to the
       // button.
       buttonText = [NSString stringWithFormat:@"  %@  ", _buttonString.get()];
       // Replace spaces by non breaking spaces to prevent buttons from wrapping.
       buttonText = [buttonText stringByReplacingOccurrencesOfString:@" "
@@ skipping 93 matching lines @@
     [_buttonTopConstraint setConstant:buttonFrame.origin.y];
     [_buttonLeftConstraint setConstant:buttonFrame.origin.x];
     [_buttonWidthConstraint setConstant:buttonFrame.size.width];
     [_buttonHeightConstraint setConstant:buttonFrame.size.height];
   }
 }
 
 - (BOOL)textView:(UITextView*)textView
     shouldInteractWithURL:(NSURL*)URL
                   inRange:(NSRange)characterRange {
-  _linkBlock.get()();
+  if (_linkBlock)
+    _linkBlock();
   return NO;
 }
 
 - (void)buttonPressed:(id)sender {
-  _buttonBlock.get()();
+  if (_buttonBlock)
+    _buttonBlock();
 }
 
 - (CGSize)intrinsicContentSize {
   return [self sizeThatFits:CGSizeMake(_currentWidth, CGFLOAT_MAX)];
 }
 
 - (CGSize)sizeThatFits:(CGSize)size {
   if (![_attributedText length])
     return CGSizeMake(size.width,
                       MIN(_insets.top + _insets.bottom, size.height));
 
   // -sizeThatFits: doesn't behaves properly with UITextView.
   // Therefore, we need to measure text size using
   // -boundingRectWithSize:options:context:.
   CGSize constraints =
       CGSizeMake(size.width - _insets.left - _insets.right, CGFLOAT_MAX);
   CGRect bounding = [_attributedText
       boundingRectWithSize:constraints
                    options:static_cast<NSStringDrawingOptions>(
                                NSStringDrawingUsesLineFragmentOrigin |
                                NSStringDrawingUsesFontLeading)
                    context:nil];
   return CGSizeMake(
       size.width,
       MIN(bounding.size.height + _insets.top + _insets.bottom, size.height));
 }
 
 @end