C++11 declares a type safe null pointer

content/common/cc_messages.cc

 // Copyright (c) 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 "content/common/cc_messages.h"
 
 #include "cc/output/compositor_frame.h"
 #include "cc/output/filter_operations.h"
 #include "cc/quads/largest_draw_quad.h"
 #include "content/public/common/common_param_traits.h"
@@ skipping 370 matching lines @@
   to_reserve += p.quad_list.size() * sizeof(cc::kLargestDrawQuad);
   return to_reserve;
 }
 
 template <typename QuadType>
 static cc::DrawQuad* ReadDrawQuad(const Message* m,
                                   PickleIterator* iter,
                                   cc::RenderPass* render_pass) {
   QuadType* quad = render_pass->CreateAndAppendDrawQuad<QuadType>();
   if (!ReadParam(m, iter, quad))
-    return NULL;
+    return nullptr;
   return quad;
 }
 
 bool ParamTraits<cc::RenderPass>::Read(
     const Message* m, PickleIterator* iter, param_type* p) {
   cc::RenderPassId id(-1, -1);
   gfx::Rect output_rect;
   gfx::Rect damage_rect;
   gfx::Transform transform_to_root_target;
   bool has_transparent_background;
@@ skipping 12 matching lines @@
             damage_rect,
             transform_to_root_target,
             has_transparent_background);
 
   for (size_t i = 0; i < quad_list_size; ++i) {
     cc::DrawQuad::Material material;
     PickleIterator temp_iter = *iter;
     if (!ReadParam(m, &temp_iter, &material))
       return false;
 
-    cc::DrawQuad* draw_quad = NULL;
+    cc::DrawQuad* draw_quad = nullptr;
     switch (material) {
       case cc::DrawQuad::CHECKERBOARD:
         draw_quad = ReadDrawQuad<cc::CheckerboardDrawQuad>(m, iter, p);
         break;
       case cc::DrawQuad::DEBUG_BORDER:
         draw_quad = ReadDrawQuad<cc::DebugBorderDrawQuad>(m, iter, p);
         break;
       case cc::DrawQuad::IO_SURFACE_CONTENT:
         draw_quad = ReadDrawQuad<cc::IOSurfaceDrawQuad>(m, iter, p);
         break;
@@ skipping 352 matching lines @@
   l->append(", ");
   LogParam(p.size, l);
   l->append(", ");
   LogParam(p.damage_rect, l);
   l->append(", ");
   LogParam(p.bitmap_id, l);
   l->append(")");
 }
 
 }  // namespace IPC