Update gl2.h and update entry points.

Some method signatures were updated. Types like GLclampf and GLvoid
were replaced with other equivalents.

BUG=angleproject:1309

Change-Id: I05e8e2072c5a063d87ad96a855b907424661e680
Reviewed-on: https://chromium-review.googlesource.com/475011
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libANGLE/validationES3.cpp b/src/libANGLE/validationES3.cpp
index 1b1961f..f37e60e 100644
--- a/src/libANGLE/validationES3.cpp
+++ b/src/libANGLE/validationES3.cpp
@@ -101,7 +101,7 @@
                                        GLenum format,
                                        GLenum type,
                                        GLsizei imageSize,
-                                       const GLvoid *pixels)
+                                       const void *pixels)
 {
     // Validate image size
     if (!ValidImageSizeParameters(context, target, level, width, height, depth, isSubImage))
@@ -350,7 +350,7 @@
                                      GLenum format,
                                      GLenum type,
                                      GLsizei imageSize,
-                                     const GLvoid *pixels)
+                                     const void *pixels)
 {
     if (!ValidTexture2DDestinationTarget(context, target))
     {
@@ -379,7 +379,7 @@
                                      GLenum format,
                                      GLenum type,
                                      GLsizei bufSize,
-                                     const GLvoid *pixels)
+                                     const void *pixels)
 {
     if (!ValidTexture3DDestinationTarget(context, target))
     {
@@ -1080,7 +1080,7 @@
                                GLuint end,
                                GLsizei count,
                                GLenum type,
-                               const GLvoid *indices)
+                               const void *indices)
 {
     if (context->getClientMajorVersion() < 3)
     {
@@ -1190,7 +1190,7 @@
                                   GLsizei depth,
                                   GLint border,
                                   GLsizei imageSize,
-                                  const GLvoid *data)
+                                  const void *data)
 {
     if (context->getClientMajorVersion() < 3)
     {
@@ -1260,7 +1260,7 @@
                                              GLint border,
                                              GLsizei imageSize,
                                              GLsizei dataSize,
-                                             const GLvoid *data)
+                                             const void *data)
 {
     if (!ValidateRobustCompressedTexImageBase(context, imageSize, dataSize))
     {
@@ -1726,7 +1726,7 @@
                         GLint border,
                         GLenum format,
                         GLenum type,
-                        const GLvoid *pixels)
+                        const void *pixels)
 {
     if (context->getClientMajorVersion() < 3)
     {
@@ -1750,7 +1750,7 @@
                                    GLenum format,
                                    GLenum type,
                                    GLsizei bufSize,
-                                   const GLvoid *pixels)
+                                   const void *pixels)
 {
     if (context->getClientMajorVersion() < 3)
     {
@@ -1779,7 +1779,7 @@
                            GLsizei depth,
                            GLenum format,
                            GLenum type,
-                           const GLvoid *pixels)
+                           const void *pixels)
 {
     if (context->getClientMajorVersion() < 3)
     {
@@ -1804,7 +1804,7 @@
                                       GLenum format,
                                       GLenum type,
                                       GLsizei bufSize,
-                                      const GLvoid *pixels)
+                                      const void *pixels)
 {
     if (context->getClientMajorVersion() < 3)
     {
@@ -1833,7 +1833,7 @@
                                      GLsizei depth,
                                      GLenum format,
                                      GLsizei imageSize,
-                                     const GLvoid *data)
+                                     const void *data)
 {
     if (context->getClientMajorVersion() < 3)
     {
@@ -1882,7 +1882,7 @@
                                                 GLenum format,
                                                 GLsizei imageSize,
                                                 GLsizei dataSize,
-                                                const GLvoid *data)
+                                                const void *data)
 {
     if (!ValidateRobustCompressedTexImageBase(context, imageSize, dataSize))
     {
@@ -2003,7 +2003,7 @@
     return true;
 }
 
-bool ValidateGetBufferPointerv(Context *context, GLenum target, GLenum pname, GLvoid **params)
+bool ValidateGetBufferPointerv(Context *context, GLenum target, GLenum pname, void **params)
 {
     return ValidateGetBufferPointervBase(context, target, pname, nullptr, params);
 }
@@ -2013,7 +2013,7 @@
                                           GLenum pname,
                                           GLsizei bufSize,
                                           GLsizei *length,
-                                          GLvoid **params)
+                                          void **params)
 {
     if (!ValidateRobustEntryPoint(context, bufSize))
     {
@@ -2455,7 +2455,7 @@
                                   GLint size,
                                   GLenum type,
                                   GLsizei stride,
-                                  const GLvoid *pointer)
+                                  const void *pointer)
 {
     if (context->getClientMajorVersion() < 3)
     {
@@ -2567,7 +2567,7 @@
                                    GLenum mode,
                                    GLsizei count,
                                    GLenum type,
-                                   const GLvoid *indices,
+                                   const void *indices,
                                    GLsizei instanceCount)
 {
     if (context->getClientMajorVersion() < 3)