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

cc/layers/render_surface.cc

 // Copyright 2010 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/layers/render_surface.h"
 
 #include "cc/base/math_util.h"
 #include "cc/layers/layer.h"
 #include "ui/gfx/transform.h"
 
 namespace cc {
 
 RenderSurface::RenderSurface(Layer* owning_layer)
     : owning_layer_(owning_layer),
       draw_opacity_(1),
       draw_opacity_is_animating_(false),
       target_surface_transforms_are_animating_(false),
       screen_space_transforms_are_animating_(false),
       is_clipped_(false),
       contributes_to_drawn_surface_(false),
-      nearest_occlusion_immune_ancestor_(NULL) {}
+      nearest_occlusion_immune_ancestor_(nullptr) {
+}
 
 RenderSurface::~RenderSurface() {
   for (size_t i = 0; i < layer_list_.size(); ++i) {
     DCHECK(!layer_list_.at(i)->render_surface()) <<
         "RenderSurfaces should be cleared from the contributing layers " <<
         "before destroying this surface to avoid leaking a circular " <<
         "reference on the contributing layer. Probably the " <<
         "RenderSurfaceLayerList should just be destroyed before destroying " <<
         "any RenderSurfaces on layers.";
   }
 }
 
 gfx::RectF RenderSurface::DrawableContentRect() const {
   gfx::RectF drawable_content_rect =
       MathUtil::MapClippedRect(draw_transform_, content_rect_);
   if (owning_layer_->has_replica())
     drawable_content_rect.Union(
         MathUtil::MapClippedRect(replica_draw_transform_, content_rect_));
   return drawable_content_rect;
 }
 
 void RenderSurface::ClearLayerLists() {
   layer_list_.clear();
 }
 
 }  // namespace cc