Refactoring: replace NULL by nullptr for pointers (3rd CL).

This CL mainly handles passing/returning NULL to/from a function.

BUG=angleproject:2001

Change-Id: I34802f792e710e3d7ff697cbe4701dc1bf5ab009
Reviewed-on: https://chromium-review.googlesource.com/485060
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/compiler/translator/OutputGLSL.cpp b/src/compiler/translator/OutputGLSL.cpp
index a7270f3..5a7de93 100644
--- a/src/compiler/translator/OutputGLSL.cpp
+++ b/src/compiler/translator/OutputGLSL.cpp
@@ -80,8 +80,8 @@
                                          "texture2DProjGradARB",
                                          "textureCubeGradEXT",
                                          "textureCubeGradARB",
-                                         NULL,
-                                         NULL};
+                                         nullptr,
+                                         nullptr};
     static const char *legacyToCoreRename[] = {
         "texture2D", "texture", "texture2DProj", "textureProj", "texture2DLod", "textureLod",
         "texture2DProjLod", "textureProjLod", "texture2DRect", "texture", "textureCube", "texture",
@@ -89,7 +89,8 @@
         // Extensions
         "texture2DLodEXT", "textureLod", "texture2DProjLodEXT", "textureProjLod",
         "textureCubeLodEXT", "textureLod", "texture2DGradEXT", "textureGrad",
-        "texture2DProjGradEXT", "textureProjGrad", "textureCubeGradEXT", "textureGrad", NULL, NULL};
+        "texture2DProjGradEXT", "textureProjGrad", "textureCubeGradEXT", "textureGrad", nullptr,
+        nullptr};
     const char **mapping =
         (sh::IsGLSL130OrNewer(getShaderOutput())) ? legacyToCoreRename : simpleRename;