[chrome/browser] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

Replace MessageLoopProxy usage with ThreadTaskRunnerHandle in icon_loader files of chrome/browser module.

MessageLoopProxy is deprecated.
This basically does a search and replace of:

MessageLoopProxy::current() -> ThreadTaskRunnerHandle::Get().

MessageLoopProxy -> SingleThreadTaskRunner

BUG=391045
Committed: https://crrev.com/4b8db4d04e9604f90f6e616689e936d0b7262622
Cr-Commit-Position: refs/heads/master@{#327470}

[Pranay, 2015-04-29 05:53:32]

pranay.kumar@samsung.com changed reviewers:
+ thestig@chromium.org

[Pranay, 2015-04-29 05:53:33]

PTAL

Thanks

[Lei Zhang, 2015-04-29 07:48:17]

https://codereview.chromium.org/1110313002/diff/1/chrome/browser/icon_loader.h
File chrome/browser/icon_loader.h (right):

https://codereview.chromium.org/1110313002/diff/1/chrome/browser/icon_loader....
chrome/browser/icon_loader.h:90: // The message loop object of the thread in
which we notify the delegate.
Please update the comment.

[Pranay, 2015-04-29 07:56:27]

Thanks Lei for the review. Updated the comments.

PTAL

[Lei Zhang, 2015-04-29 08:01:41]

lgtm

Feel free to do the conversion for more than a single class in a CL.

[Pranay, 2015-04-29 09:21:38]

The CQ bit was checked by pranay.kumar@samsung.com

[commit-bot: I haz the power, 2015-04-29 09:21:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1110313002/20001

[commit-bot: I haz the power, 2015-04-29 11:12:14]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-04-29 11:13:09]

Patchset 2 (id:??) landed as
https://crrev.com/4b8db4d04e9604f90f6e616689e936d0b7262622
Cr-Commit-Position: refs/heads/master@{#327470}

[Pranay, 2015-05-04 03:29:08]

Done

https://codereview.chromium.org/1110313002/diff/1/chrome/browser/icon_loader.h
File chrome/browser/icon_loader.h (right):

https://codereview.chromium.org/1110313002/diff/1/chrome/browser/icon_loader....
chrome/browser/icon_loader.h:90: // The message loop object of the thread in
which we notify the delegate.
On 2015/04/29 07:48:17, Lei Zhang wrote:
> Please update the comment.

Done.