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

extensions/browser/api/system_display/display_info_provider.cc

 // Copyright 2013 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/browser/api/system_display/display_info_provider.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "extensions/common/api/system_display.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/screen.h"
 
 namespace extensions {
 
 namespace {
 
 // Created on demand and will leak when the process exits.
-DisplayInfoProvider* g_display_info_provider = NULL;
+DisplayInfoProvider* g_display_info_provider = nullptr;
 
 // Converts Rotation enum to integer.
 int RotationToDegrees(gfx::Display::Rotation rotation) {
   switch (rotation) {
     case gfx::Display::ROTATE_0:
       return 0;
     case gfx::Display::ROTATE_90:
       return 90;
     case gfx::Display::ROTATE_180:
       return 180;
@@ skipping 27 matching lines @@
   return unit;
 }
 
 }  // namespace
 
 DisplayInfoProvider::~DisplayInfoProvider() {
 }
 
 // static
 DisplayInfoProvider* DisplayInfoProvider::Get() {
-  if (g_display_info_provider == NULL)
+  if (g_display_info_provider == nullptr)
     g_display_info_provider = DisplayInfoProvider::Create();
   return g_display_info_provider;
 }
 
 // static
 void DisplayInfoProvider::InitializeForTesting(
     DisplayInfoProvider* display_info_provider) {
   DCHECK(display_info_provider);
   g_display_info_provider = display_info_provider;
 }
@@ skipping 10 matching lines @@
     UpdateDisplayUnitInfoForPlatform(displays[i], unit.get());
     all_displays.push_back(unit);
   }
   return all_displays;
 }
 
 DisplayInfoProvider::DisplayInfoProvider() {
 }
 
 }  // namespace extensions