C++11 declares a type safe null pointer

content/common/gpu/media/tegra_v4l2_video_device.cc

Index: content/common/gpu/media/tegra_v4l2_video_device.cc
diff --git a/content/common/gpu/media/tegra_v4l2_video_device.cc b/content/common/gpu/media/tegra_v4l2_video_device.cc
index 991f54a76d3fdfa0dc541795df2a8a5f957d2867..d8387d1d9fd013f97b398a21c0259c1ce52de9fc 100644
--- a/content/common/gpu/media/tegra_v4l2_video_device.cc
+++ b/content/common/gpu/media/tegra_v4l2_video_device.cc
@@ -36,7 +36,7 @@ typedef int32 (*TegraV4L2UseEglImage)(int fd,
                                       unsigned int buffer_index,
                                       void* egl_image);
 
-#define TEGRAV4L2_SYM(name) TegraV4L2##name TegraV4L2_##name = NULL
+#define TEGRAV4L2_SYM(name) TegraV4L2##name TegraV4L2_##name = nullptr
 
 TEGRAV4L2_SYM(Open);
 TEGRAV4L2_SYM(Close);
@@ -62,7 +62,7 @@ class TegraFunctionSymbolFinder {
   do {                                                    \
     TegraV4L2_##name = reinterpret_cast<TegraV4L2##name>( \
         dlsym(RTLD_DEFAULT, "TegraV4L2_" #name));         \
-    if (TegraV4L2_##name == NULL) {                       \
+    if (TegraV4L2_##name == nullptr) {                       \
       LOG(ERROR) << "Failed to dlsym TegraV4L2_" #name;   \
       return;                                             \
     }                                                     \
@@ -144,7 +144,7 @@ bool TegraV4L2Device::ClearDevicePollInterrupt() {
 }
 
 bool TegraV4L2Device::Initialize() {
-  const char* device_path = NULL;
+  const char* device_path = nullptr;
   switch (type_) {
     case kDecoder:
       device_path = kDecoderDevice;