Processes don't really result in CPU overhead. 3 processes vs 1 process is a bunch of kernel entries for the processes and that's it. For the scheduler, it creates what is called "a drop in the ocean" type of impact.
And now we're back to Flash. So back to my original comment. Disable or make Flash on demand and Chrome won't use more CPU. That was my whole point when I replied to you the first time, you said "but it's not about Flash!" then you came back and say it is.
Which is it ? Safari vs Chrome idling on a Webpage. It is about Flash or not ? Because just siting there, Safari vs Chrome, both are equally draining the battery and equaling using the CPU. Don't change the variables on me everytime you post, that's just insane and can't ever lead to proper discussion.
Blaming Google for what ? Bugs in software happen all the time, Apple's own is riddled with it, hence all the patches they put out. Software on the scale both Google and Apple write will always have tons of bugs that are triggered by edge conditions not trapped by unit tests in Q&A. There's just no way to account for all the variables all the time. Sometimes, a condition may never even be triggered for the entire life of the software.
You keep saying Chrome is a hog, but everyone that switched to Chrome did so because of the contrary : it's blazingly fast and light. What do you feel Chrome hogs exactly ?
Looking at Chrome's task manager (yes, Chrome provides its own) you can see the break down :
View attachment 346066
As you can see, very very little CPU is being used. Memory is also quite low on the browser itself, it's the tabs which contain heavy Web 2.0 code (Facebook/Gmail) that are more memory heavy since these tend to dynamically load and reload a ton of stuff in the background, but then again, total seems to be low for a modern browser (I've seen Safari use Gigabytes of memory).
Also notice how the Flash plugin is missing. It is enabled though. Chrome only loads it if a web page asks for it. So just by virtue of Flash being there, it's not using any ressources at all. Making it completely on-demand with FlashBlock prevents it from loading unless you want to on top. So you can't even use that to say "Chrome is a hog".
Again, the more you talk about this, the more I'm thinking there's either something very wrong with your computer, or you just don't understand modern OSes and how they work exactly. Hence I'm left puzzled by how you think you are tooled to even be making the claims you are making.