Style Change: NULL->nullptr

dm/DMGpuSupport.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef DMGpuSupport_DEFINED
 #define DMGpuSupport_DEFINED
 
@@ skipping 68 matching lines @@
 namespace DM {
 
 static const bool kGPUDisabled = true;
 
 static inline SkSurface* NewGpuSurface(GrContextFactory*,
                                        GrContextFactory::GLContextType,
                                        GrGLStandard,
                                        SkImageInfo,
                                        int,
                                        bool) {
-    return NULL;
+    return nullptr;
 }
 
 }  // namespace DM
 
 #endif//SK_SUPPORT_GPU
 
 #endif//DMGpuSupport_DEFINED