Add EGL_NV_n_buffer extensions.
diff --git a/api/EGL/egl.h b/api/EGL/egl.h
index aef3596..7ed0e32 100644
--- a/api/EGL/egl.h
+++ b/api/EGL/egl.h
@@ -33,7 +33,7 @@
 ** used to make the header, and the header can be found at
 **   http://www.khronos.org/registry/egl
 **
-** Khronos $Git commit SHA1: 7829ea3302 $ on $Git commit date: 2019-03-20 17:32:00 +0530 $
+** Khronos $Git commit SHA1: 9d1b9028d2 $ on $Git commit date: 2019-03-21 10:38:41 +0530 $
 */
 
 #include <EGL/eglplatform.h>
diff --git a/api/EGL/eglext.h b/api/EGL/eglext.h
index 16e78ea..be6548e 100644
--- a/api/EGL/eglext.h
+++ b/api/EGL/eglext.h
@@ -33,7 +33,7 @@
 ** used to make the header, and the header can be found at
 **   http://www.khronos.org/registry/egl
 **
-** Khronos $Git commit SHA1: 7829ea3302 $ on $Git commit date: 2019-03-20 17:32:00 +0530 $
+** Khronos $Git commit SHA1: 9d1b9028d2 $ on $Git commit date: 2019-03-21 10:38:41 +0530 $
 */
 
 #include <EGL/eglplatform.h>
@@ -1108,12 +1108,6 @@
 #define EGL_CUDA_DEVICE_NV                0x323A
 #endif /* EGL_NV_device_cuda */
 
-#ifndef EGL_NV_n_buffer
-#define EGL_NV_n_buffer 1
-#define EGL_TRIPLE_BUFFER_NV              0x3230
-#define EGL_QUADRUPLE_BUFFER_NV           0x3231
-#endif /* EGL_NV_n_buffer */
-
 #ifndef EGL_NV_native_query
 #define EGL_NV_native_query 1
 typedef EGLBoolean (EGLAPIENTRYP PFNEGLQUERYNATIVEDISPLAYNVPROC) (EGLDisplay dpy, EGLNativeDisplayType *display_id);
diff --git a/api/egl.xml b/api/egl.xml
index cb61c47..01b6c25 100644
--- a/api/egl.xml
+++ b/api/egl.xml
@@ -2926,12 +2926,6 @@
                 <enum name="EGL_CUDA_DEVICE_NV"/>
             </require>
         </extension>
-        <extension name="EGL_NV_n_buffer" supported="egl">
-            <require>
-                <enum name="EGL_TRIPLE_BUFFER_NV"/>
-                <enum name="EGL_QUADRUPLE_BUFFER_NV"/>
-            </require>
-        </extension>
         <extension name="EGL_NV_native_query" supported="egl">
             <require>
                 <command name="eglQueryNativeDisplayNV"/>