Only allow TexStorage2DEXT if we expose the extension

gpu/command_buffer/service/gles2_cmd_decoder_autogen.h

Index: gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
index ac09b95e26eae31c70bb2f69887e9cb8c8df003b..abb9749086a7b4a5d35fdd2ee843a6da8cf85883 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
@@ -4408,6 +4408,10 @@ error::Error GLES2DecoderImpl::HandleTexStorage2DEXT(
   const gles2::cmds::TexStorage2DEXT& c =
       *static_cast<const gles2::cmds::TexStorage2DEXT*>(cmd_data);
   (void)c;
+  if (!features().ext_texture_storage) {
+    return error::kUnknownCommand;
+  }
+
   GLenum target = static_cast<GLenum>(c.target);
   GLsizei levels = static_cast<GLsizei>(c.levels);
   GLenum internalFormat = static_cast<GLenum>(c.internalFormat);