"NULL !=" = NULL

src/gpu/gl/unix/GrGLCreateNativeInterface_unix.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "gl/GrGLInterface.h"
 #include "gl/GrGLAssembleInterface.h"
 #include "gl/GrGLUtil.h"
 
 #include <GL/glx.h>
 
 static GrGLFuncPtr glx_get(void* ctx, const char name[]) {
     SkASSERT(NULL == ctx);
-    SkASSERT(NULL != glXGetCurrentContext());
+    SkASSERT(glXGetCurrentContext());
     return glXGetProcAddress(reinterpret_cast<const GLubyte*>(name));
 }
 
 const GrGLInterface* GrGLCreateNativeInterface() {
     if (NULL == glXGetCurrentContext()) {
         return NULL;
     }
 
     return GrGLAssembleInterface(NULL, glx_get);
 }