Run clang-modernize -use-nullptr over src/extensions/.

extensions/shell/browser/shell_nacl_browser_delegate.cc

 // Copyright 2014 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 "extensions/shell/browser/shell_nacl_browser_delegate.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/path_service.h"
@@ skipping 99 matching lines @@
 }
 
 std::string ShellNaClBrowserDelegate::GetVersionString() const {
   // A version change triggers an update of the NaCl validation caches.
   // Example version: "39.0.2129.0 (290550)".
   return PRODUCT_VERSION " (" LAST_CHANGE ")";
 }
 
 ppapi::host::HostFactory* ShellNaClBrowserDelegate::CreatePpapiHostFactory(
     content::BrowserPpapiHost* ppapi_host) {
-  return NULL;
+  return nullptr;
 }
 
 void ShellNaClBrowserDelegate::SetDebugPatterns(std::string debug_patterns) {
   // No debugger support. Developers should use Chrome for debugging.
 }
 
 bool ShellNaClBrowserDelegate::URLMatchesDebugPatterns(
     const GURL& manifest_url) {
   // No debugger support. Developers should use Chrome for debugging.
   return false;
@@ skipping 49 matching lines @@
   return base::Bind(&OnKeepalive);
 }
 
 bool ShellNaClBrowserDelegate::IsNonSfiModeAllowed(
     const base::FilePath& profile_directory,
     const GURL& manifest_url) {
   return false;
 }
 
 }  // namespace extensions