Converts ios/chrome/browser/native_app_launcher:native_app_launcher_internal to ARC.

ios/chrome/browser/tabs/tab.mm

 // Copyright 2012 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/tabs/tab.h"
 
 #import <CoreLocation/CoreLocation.h>
 #import <UIKit/UIKit.h>
 
 #include <utility>
@@ skipping 1829 matching lines @@
 }
 
 - (BOOL)urlTriggersNativeAppLaunch:(const GURL&)url
                          sourceURL:(const GURL&)sourceURL
                        linkClicked:(BOOL)linkClicked {
   // Don't open any native app directly when prerendering or from Incognito.
   if (isPrerenderTab_ || self.browserState->IsOffTheRecord())
     return NO;
 
   base::scoped_nsprotocol<id<NativeAppMetadata>> metadata(
-      [ios::GetChromeBrowserProvider()->GetNativeAppWhitelistManager()
-          newNativeAppForURL:url]);
+      [[ios::GetChromeBrowserProvider()->GetNativeAppWhitelistManager()
+          nativeAppForURL:url] retain]);
   if (![metadata shouldAutoOpenLinks])
     return NO;
 
   AuthenticationService* authenticationService =
       AuthenticationServiceFactory::GetForBrowserState(self.browserState);
   ChromeIdentity* identity = authenticationService->GetAuthenticatedIdentity();
 
   // Attempts to open external app without x-callback.
   if ([self openExternalURL:[metadata launchURLWithURL:url identity:identity]
                 linkClicked:linkClicked]) {
@@ skipping 395 matching lines @@
 
 - (TabModel*)parentTabModel {
   return parentTabModel_;
 }
 
 - (FormInputAccessoryViewController*)inputAccessoryViewController {
   return inputAccessoryViewController_.get();
 }
 
 @end