chrome: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

chrome: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

This patch was mostly autogenerated with https://codereview.chromium.org/1010073002/.

BUG=465354
Committed: https://crrev.com/140473b16767c66fc00fd7b0e6f6cc034a6712a8
Cr-Commit-Position: refs/heads/master@{#333745}

[Sami, 2015-06-08 18:42:35]

skyostil@chromium.org changed reviewers:
+ jochen@chromium.org

[jochen (gone - plz use gerrit), 2015-06-09 08:03:01]

lgtm

[Sami, 2015-06-10 15:48:19]

The CQ bit was checked by skyostil@chromium.org

[Sami, 2015-06-10 15:48:20]

The patchset sent to the CQ was uploaded after l-g-t-m from jochen@chromium.org
Link to the patchset: https://codereview.chromium.org/1167163002/#ps20001
(title: "Added some missing message_loop.h includes.")

[commit-bot: I haz the power, 2015-06-10 15:49:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1167163002/20001

[commit-bot: I haz the power, 2015-06-10 16:45:02]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-06-10 16:46:23]

Patchset 2 (id:??) landed as
https://crrev.com/140473b16767c66fc00fd7b0e6f6cc034a6712a8
Cr-Commit-Position: refs/heads/master@{#333745}