URLFetcher uses a TaskRunner instead of a message loop.

URLFetcher uses a TaskRunner instead of a message loop.

Note that with this change, the URLFetcher can still be used with a MessageLoop,
since MessageLoop is a task runner.

BUG=NONE


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=157545

[wtc, 2012-09-17 22:45:10]

Patch set 2 LGTM.

[wtc, 2012-09-17 22:47:13]

Nit: the CL's description says:
  This allow the URLFetcher to be used in conjunction with
  the blocking pool.

Since the CL is entirely within src/net, it is better to
avoid mentioning "the blocking pool", which I think is the
blocking pool of the browser thread, something outside src/net.

[commit-bot: I haz the power, 2012-09-19 09:27:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/droger@chromium.org/10915307/2001

[commit-bot: I haz the power, 2012-09-19 13:48:07]

Change committed as 157545