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

ios/chrome/browser/ui/history/favicon_view.mm

Index: ios/chrome/browser/ui/history/favicon_view.mm
diff --git a/ios/chrome/browser/ui/history/favicon_view.mm b/ios/chrome/browser/ui/history/favicon_view.mm
index bef1d0ef5f5b5ba983694017655961dacc70b877..e2958ebb7a7ec0b0438231eab1945c8b461169de 100644
--- a/ios/chrome/browser/ui/history/favicon_view.mm
+++ b/ios/chrome/browser/ui/history/favicon_view.mm
@@ -4,9 +4,12 @@
 
 #import "ios/chrome/browser/ui/history/favicon_view.h"
 
-#include "base/mac/objc_property_releaser.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 // Default corner radius for the favicon image view.
 const CGFloat kDefaultCornerRadius = 3;
@@ -14,7 +17,6 @@ const CGFloat kDefaultCornerRadius = 3;
 
 @interface FaviconView () {
   // Property releaser for FaviconView.
-  base::mac::ObjCPropertyReleaser _propertyReleaser_FaviconView;
 }
 // Size constraints for the favicon views.
 @property(nonatomic, copy) NSArray* faviconSizeConstraints;
@@ -30,7 +32,6 @@ const CGFloat kDefaultCornerRadius = 3;
 - (instancetype)initWithFrame:(CGRect)frame {
   self = [super initWithFrame:frame];
   if (self) {
-    _propertyReleaser_FaviconView.Init(self, [FaviconView class]);
     _faviconImage = [[UIImageView alloc] init];
     _faviconImage.clipsToBounds = YES;
     _faviconImage.layer.cornerRadius = kDefaultCornerRadius;
@@ -51,10 +52,10 @@ const CGFloat kDefaultCornerRadius = 3;
     AddSameSizeConstraint(_faviconImage, self);
     AddSameCenterConstraints(_faviconFallbackLabel, self);
     AddSameSizeConstraint(_faviconFallbackLabel, self);
-    _faviconSizeConstraints = [@[
+    _faviconSizeConstraints = @[
       [self.widthAnchor constraintEqualToConstant:0],
       [self.heightAnchor constraintEqualToConstant:0],
-    ] retain];
+    ];
     [NSLayoutConstraint activateConstraints:_faviconSizeConstraints];
   }
   return self;