Add GL_PROGRAM_COMPLETION_QUERY_CHROMIUM

This makes the query of GL_COMPLETION_STATUS_KHR to programs much
cheaper by minimizing the round-trip to the GPU thread.

Bug: 881152, 957001
Change-Id: Iadfa798af29225e752c710ca5c25f50b3dd3101a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1586630
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#657568}
GLint GLES2Implementation::GetAttribLocation(GLuint program, const char* name) {
  GPU_CLIENT_SINGLE_THREAD_CHECK();
  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glGetAttribLocation(" << program
                     << ", " << name << ")");
  TRACE_EVENT0("gpu", "GLES2::GetAttribLocation");
  GLint loc = share_group_->program_info_manager()->GetAttribLocation(
      this, program, name);
  GPU_CLIENT_LOG("returned " << loc);
  CheckGLError();
  return loc;
}

GLint GLES2Implementation::GetAttribLocation(GLuint program, const char* name) {
  GPU_CLIENT_SINGLE_THREAD_CHECK();
  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glGetAttribLocation(" << program
                     << ", " << name << ")");
  TRACE_EVENT0("gpu", "GLES2::GetAttribLocation");
  GLint loc = share_group_->program_info_manager()->GetAttribLocation(
      this, program, name);
  GPU_CLIENT_LOG("returned " << loc);
  CheckGLError();
  return loc;
}
