Rewrite scoped_ptr<T>(NULL) to use the default ctor in content/.

content/browser/loader/resource_dispatcher_host_browsertest.cc

 // Copyright (c) 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.
 
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/download/download_manager_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 234 matching lines @@
   EXPECT_EQ("onunloadCookie=foo", GetCookies(url));
 }
 
 namespace {
 
 // Handles |request| by serving a redirect response.
 scoped_ptr<net::test_server::HttpResponse> NoContentResponseHandler(
     const std::string& path,
     const net::test_server::HttpRequest& request) {
   if (!StartsWithASCII(path, request.relative_url, true))
-    return scoped_ptr<net::test_server::HttpResponse>(NULL);
+    return scoped_ptr<net::test_server::HttpResponse>();
 
   scoped_ptr<net::test_server::BasicHttpResponse> http_response(
       new net::test_server::BasicHttpResponse);
   http_response->set_code(net::test_server::NO_CONTENT);
   return http_response.PassAs<net::test_server::HttpResponse>();
 }
 
 }  // namespace
 
 // Tests that the unload handler is not run for 204 responses.
@@ skipping 148 matching lines @@
                        CrossSiteFailedRequest) {
   // Visit another URL first to trigger a cross-site navigation.
   NavigateToURL(shell(), GetTestUrl("", "simple_page.html"));
 
   // Visit a URL that fails without calling ResourceDispatcherHost::Read.
   GURL broken_url("chrome://theme");
   NavigateToURL(shell(), broken_url);
 }
 
 }  // namespace content