[C++11 Allowed Features] Declares a type-safe null pointer converting from NULL to nullptr in src/…

cc/resources/ui_resource_bitmap.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 "cc/resources/ui_resource_bitmap.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkMallocPixelRef.h"
@@ skipping 48 matching lines @@
          SkColorTypeToUIResourceFormat(skbitmap.colorType()));
 
   SetOpaque(skbitmap.isOpaque());
 }
 
 UIResourceBitmap::UIResourceBitmap(const gfx::Size& size, bool is_opaque) {
   SkAlphaType alphaType = is_opaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
   SkImageInfo info =
       SkImageInfo::MakeN32(size.width(), size.height(), alphaType);
   skia::RefPtr<SkPixelRef> pixel_ref = skia::AdoptRef(
-      SkMallocPixelRef::NewAllocate(info, info.minRowBytes(), NULL));
+      SkMallocPixelRef::NewAllocate(info, info.minRowBytes(), nullptr));
   pixel_ref->setImmutable();
   Create(pixel_ref, size, UIResourceBitmap::RGBA8);
   SetOpaque(is_opaque);
 }
 
 UIResourceBitmap::UIResourceBitmap(const skia::RefPtr<SkPixelRef>& pixel_ref,
                                    const gfx::Size& size) {
   Create(pixel_ref, size, UIResourceBitmap::ETC1);
 }
 
 UIResourceBitmap::~UIResourceBitmap() {}
 
 AutoLockUIResourceBitmap::AutoLockUIResourceBitmap(
     const UIResourceBitmap& bitmap) : bitmap_(bitmap) {
   bitmap_.pixel_ref_->lockPixels();
 }
 
 AutoLockUIResourceBitmap::~AutoLockUIResourceBitmap() {
   bitmap_.pixel_ref_->unlockPixels();
 }
 
 const uint8_t* AutoLockUIResourceBitmap::GetPixels() const {
   return static_cast<const uint8_t*>(bitmap_.pixel_ref_->pixels());
 }
 
 }  // namespace cc