Replace all NULL with nullptr

Bug: angleproject:1695

Change-Id: Ide0591ffdad5815385a4d805b320a32533bcc03a
Reviewed-on: https://chromium-review.googlesource.com/883681
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Luc Ferron <lucferron@google.com>
diff --git a/src/tests/perf_tests/MultiviewPerf.cpp b/src/tests/perf_tests/MultiviewPerf.cpp
index 8c106b4..b733c29 100644
--- a/src/tests/perf_tests/MultiviewPerf.cpp
+++ b/src/tests/perf_tests/MultiviewPerf.cpp
@@ -182,11 +182,11 @@
 
     glBindTexture(GL_TEXTURE_2D, mColorTexture);
     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, params->windowWidth, params->windowHeight, 0, GL_RGBA,
-                 GL_UNSIGNED_BYTE, NULL);
+                 GL_UNSIGNED_BYTE, nullptr);
 
     glBindTexture(GL_TEXTURE_2D, mDepthTexture);
     glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32F, params->windowWidth, params->windowHeight,
-                 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
+                 0, GL_DEPTH_COMPONENT, GL_FLOAT, nullptr);
 
     glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);