Add CopyTexSubImage3D to GPU command buffer.

gpu/command_buffer/client/gles2_cmd_helper_autogen.h

Index: gpu/command_buffer/client/gles2_cmd_helper_autogen.h
diff --git a/gpu/command_buffer/client/gles2_cmd_helper_autogen.h b/gpu/command_buffer/client/gles2_cmd_helper_autogen.h
index 2b9cd8b90bb374128e4d0751e9642403a9d31159..186a5a520f25f3824315f978191e8caf0515b05c 100644
--- a/gpu/command_buffer/client/gles2_cmd_helper_autogen.h
+++ b/gpu/command_buffer/client/gles2_cmd_helper_autogen.h
@@ -359,6 +359,22 @@ void CopyTexSubImage2D(GLenum target,
   }
 }
 
+void CopyTexSubImage3D(GLenum target,
+                       GLint level,
+                       GLint xoffset,
+                       GLint yoffset,
+                       GLint zoffset,
+                       GLint x,
+                       GLint y,
+                       GLsizei width,
+                       GLsizei height) {
+  gles2::cmds::CopyTexSubImage3D* c =
+      GetCmdSpace<gles2::cmds::CopyTexSubImage3D>();
+  if (c) {
+    c->Init(target, level, xoffset, yoffset, zoffset, x, y, width, height);
+  }
+}
+
 void CreateProgram(uint32_t client_id) {
   gles2::cmds::CreateProgram* c = GetCmdSpace<gles2::cmds::CreateProgram>();
   if (c) {