Revert 222826 "Copy the thread name to the stack for debugging p..."

Revert 222826 "Copy the thread name to the stack for debugging p..."

> Copy the thread name to the stack for debugging purposes.
> 
> The this ptr in Thread is getting smashed after the MessageLoop ends, which
> leaves very little to go on. This is kind of a stab in the dark, but hopefully
> it makes something bleed in a general direction.
> 
> BUG=274705
> TEST=Minidumps contain 47 bytes of thread name data way high on the stack.
> R=mark@chromium.org
> 
> Review URL: https://codereview.chromium.org/23606030

TBR=rsesek@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=225228

[Robert Sesek, 2013-09-25 19:31:46]

Committed patchset #1 manually as r225228.