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

ios/chrome/browser/ui/native_content_controller.mm

Index: ios/chrome/browser/ui/native_content_controller.mm
diff --git a/ios/chrome/browser/ui/native_content_controller.mm b/ios/chrome/browser/ui/native_content_controller.mm
index 59f7a3b391ad0dd6aef9ecedf116d9c6b956bb98..0fd43a252e964b03e62cb163b29b89c6ef96b0a9 100644
--- a/ios/chrome/browser/ui/native_content_controller.mm
+++ b/ios/chrome/browser/ui/native_content_controller.mm
@@ -8,13 +8,11 @@
 
 #include "base/mac/bundle_locations.h"
 #import "base/mac/foundation_util.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
+#include "base/mac/objc_property_releaser.h"
 
 @implementation NativeContentController {
   GURL _url;
+  base::mac::ObjCPropertyReleaser _propertyReleaser_NativeContentController;
 }
 
 @synthesize view = _view;
@@ -24,6 +22,8 @@
 - (instancetype)initWithNibName:(NSString*)nibName url:(const GURL&)url {
   self = [super init];
   if (self) {
+    _propertyReleaser_NativeContentController.Init(
+        self, [NativeContentController class]);
     if (nibName.length) {
       [base::mac::FrameworkBundle() loadNibNamed:nibName
                                            owner:self
@@ -34,12 +34,18 @@
   return self;
 }
 
+- (instancetype)init {
+  NOTREACHED();
+  return nil;
+}
+
 - (instancetype)initWithURL:(const GURL&)url {
   return [self initWithNibName:nil url:url];
 }
 
 - (void)dealloc {
   [_view removeFromSuperview];
+  [super dealloc];
 }
 
 #pragma mark CRWNativeContent