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

chrome/browser/ui/search/instant_loader.cc

 // 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.
 
 #include "chrome/browser/ui/search/instant_loader.h"
 
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 #include "chrome/browser/extensions/api/web_navigation/web_navigation_api.h"
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 #include "chrome/browser/history/history_tab_helper.h"
@@ skipping 15 matching lines @@
 
 // This HTTP header and value are set on loads that originate from Instant.
 const char kInstantHeader[] = "X-Purpose: Instant";
 
 }  // namespace
 
 InstantLoader::Delegate::~Delegate() {
 }
 
 InstantLoader::InstantLoader(Delegate* delegate)
-  : delegate_(delegate),
-    contents_(NULL),
-    stale_page_timer_(false, false) {
-}
+    : delegate_(delegate), stale_page_timer_(false, false) {}
 
 InstantLoader::~InstantLoader() {
 }
 
 void InstantLoader::Init(const GURL& instant_url,
                          Profile* profile,
                          const content::WebContents* active_tab,
                          const base::Closure& on_stale_callback) {
   content::WebContents::CreateParams create_params(profile);
   create_params.site_instance = content::SiteInstance::CreateForURL(
@@ skipping 183 matching lines @@
 
 bool InstantLoader::OnGoToEntryOffset(int /* offset */) {
   return false;
 }
 
 content::WebContents* InstantLoader::OpenURLFromTab(
     content::WebContents* source,
     const content::OpenURLParams& params) {
   return delegate_->OpenURLFromTab(source, params);
 }