Remove message_loop_helpers.h and update the includes to point to the new location.

Remove message_loop_helpers.h and update the includes to point to the new location.

Note: This was a TODO for akalin@.

This patch was generated by:
$ find . -name '*.h' -o -name '*.cc' -o -name '*.mm' | xargs sed -i -e "s/base\/message_loop_helpers.h/base\/sequenced_task_runner_helpers.h/g"

R=akalin@chromium.org
TBR=willchan@chromium.org,ben@chromium.org,jam@chromium.org,tony@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=143174

[tfarina, 2012-06-19 22:43:38]

Please, take a look.

[akalin, 2012-06-20 08:51:52]

LGTM!

You probably wanna TBR all the owners.

[tfarina, 2012-06-20 15:09:42]

On 2012/06/20 08:51:52, akalin wrote:
> LGTM!
> 
> You probably wanna TBR all the owners.

Yup, TBRing... ;)