Mac: Make ScopedTypeRef require explicit constructors

chrome/browser/notifications/notification_builder_mac.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.
 
 #include "chrome/browser/notifications/notification_builder_mac.h"
 
 #import <AppKit/AppKit.h>
 
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_nsobject.h"
@@ skipping 24 matching lines @@
 NSString* const kNotificationIncognito = @"notificationIncognito";
 
 }  // namespace notification_builder
 
 @implementation NotificationBuilder {
   base::scoped_nsobject<NSMutableDictionary> notificationData_;
 }
 
 - (instancetype)init {
   if ((self = [super init])) {
-    notificationData_ = [[NSMutableDictionary alloc] init];
+    notificationData_.reset([[NSMutableDictionary alloc] init]);
   }
   return self;
 }
 
 - (instancetype)initWithDictionary:(NSDictionary*)data {
   if ((self = [super init])) {
-    notificationData_ = [data copy];
+    notificationData_.reset([data copy]);
   }
   return self;
 }
 
 - (void)setTitle:(NSString*)title {
   if (title.length)
     [notificationData_ setObject:title forKey:kNotificationTitle];
 }
 
 - (void)setSubTitle:(NSString*)subTitle {
@@ skipping 142 matching lines @@
   };
 
   return toast.autorelease();
 }
 
 - (NSDictionary*)buildDictionary {
   return [[notificationData_ copy] autorelease];
 }
 
 @end