Set the profiler's thread name at a central place

Set the profiler's thread name at a central place

This will automatically catch thread names in several of the
child processes we are after, and it also catches the name
for a webkcore thread.

The underlying function uses a try/catch clause, which
contaminates the entire function.  As a result, I needed
to factor out that section, so that I could still call
to set the profiler thread name.  Without this, the
shared dbg build will fail to compile.

r=rtenneti
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=110003

[jar (doing other things), 2011-11-15 00:49:22]

Sky: Please rubber stamp minor content change.

Raman: Please review this relanding (with a subtle change to factor out the try
code, per suggestion/explanation by rvargas).

[sky, 2011-11-15 00:56:59]

Rubber stamp LGTM

[Ben Goodger (Google), 2011-11-15 01:00:41]

lgtm

[ramant (doing other things), 2011-11-15 01:14:30]

lgtm