Do you know what this means?
"Only slight movement was seen in the ethic compensation of Google's workforce."
What is "ethic compensation"? Maybe the article was written on a mobile device with autocorrection and then never reviewed by an editor. If you meant "ethnic composition" then you should have written that. I give the benefit of doubt that this is an oversight. Now that it is pointed out please fix it in the article. Otherwise it remains a piece that comes across as written by someone clueless who loves throwing around words without knowing what they mean.
As far as unconscious bias and ethnic composition, this is a problem in all tech companies. I haven't been to all, but worked for or was in extensive contact with quite many. I think that at the time people seek employment in tech companies adjusting for unconcious bias is already too late. That has to happen way earlier.
What tech companies can do is give more candidates a chance. There are positions that require a basic skill set that cannot be acquired within a short time, but there are plenty of positions where this does not apply. Don't hire only the top graduates who did already a dozen successful projects, have 10 years experience, 10 years overseas, and are 23 year old white males. My last hire was interested in technology, but had zero experience in the area of expertise of the position to fill. During the short interview process (not the 12 weeks ordeal that many tech companies make people go through!) he showed clearly that he can look at a problem, grasp what the issue is, come to a proposal, and explain why he figured that this is how it should be solved. Yes, he missed a few aspects, but that was due to missing domain knowledge. It's not even a year since then and he is one of the most creative and productive members on the team, his contributions have the quality that one would expect from someone who did this for decades.
We also started a few years back creating paid positions for interns. One we hired right out of college, the others we often bring in for special assignments while they continue with the path they want to take. And as it turns out, all of them fall into one or more of the minority groups. We now also started hiring folks who are mid 50s or older, even a few who are more or less retired. They work part time or on special assignments and bring a lot of experience, some are full time and are happy to get a real chance to show what they can do even if they retire in a few years.
Fixing the diversity problem is easy when the often ridiculous skill requirements are dialed back. It matters what people can do for the company, not which certificates and degrees they have. That only shows they operate well in a classroom setting and managed to get enough money to pay for it. That may or may not relate well to the real world.