What steps will reproduce the problem?
(1) open chrome with command line: --enable-unsafe-es3-apis
(2) go to https://www.khronos.org/registry/webgl/sdk/tests/deqp/functional/gles3/shaderstatequery.html?webglVersion=2

What is the expected output?
All tests should pass.

What do you see instead?
shader.transform_feedback test fails.


This test is simple:
first it create a program: var shaderProg = gl.createProgram();
then it check default transform feedback buffer mode is INTERLEAVED_ATTRIBS:
this.check(glsStateQuery.verifyProgram(shaderProg, gl.TRANSFORM_FEEDBACK_BUFFER_MODE, gl.INTERLEAVED_ATTRIBS));

This fails at the following command buffer client code:
gpu/command_buffer/client/gles2_implementation_impl_autogen.h
GLES2Implementation::GetTexParameteriv() {
...
  result->SetNumResults(0);                                                                                                                                                                
  helper_->GetTexParameteriv(target, pname, GetResultShmId(),
                             GetResultShmOffset());
  WaitForCmd();
  result->CopyResult(params);
...
}

result->data do get the query data from GetTexParameteriv, but the number of results is set to 0 by "result->SetNumResults(0); ", so "result->CopyResult(params);" doesn't copy data to params.

Any reasons for setting number of the reuslts to 0?