Add some tracing for Profiles and Extensions.

Add some tracing for Profiles and Extensions.

This is from investigation on PreMainMessageLoopRunImpl

BUG=454789
Committed: https://crrev.com/e65c2ff204265d61af3734c6be6e7eb3fa8c3e66
Cr-Commit-Position: refs/heads/master@{#316391}

[rkaplow, 2015-02-13 22:51:19]

rkaplow@chromium.org changed reviewers:
+ thestig@chromium.org

[Lei Zhang, 2015-02-13 23:22:48]

lgtm

I guess whoever is doing the trace will want both the "browser" and "startup"
categories.

[rkaplow, 2015-02-13 23:30:50]

New patchsets have been uploaded after l-g-t-m from thestig@chromium.org

[rkaplow, 2015-02-13 23:32:34]

On 2015/02/13 23:22:48, Lei Zhang wrote:
> lgtm
> 
> I guess whoever is doing the trace will want both the "browser" and "startup"
> categories.

Good point. I left all the profile ones as simply browser as they can get
triggered when opening a new profile which can happen outside of startup. I
think it'll be less confusing this way.
LMK, I'll hold off on submitting for a bit.

[Lei Zhang, 2015-02-13 23:33:35]

On 2015/02/13 23:32:34, rkaplow wrote:
> On 2015/02/13 23:22:48, Lei Zhang wrote:
> > lgtm
> > 
> > I guess whoever is doing the trace will want both the "browser" and
"startup"
> > categories.
> 
> Good point. I left all the profile ones as simply browser as they can get
> triggered when opening a new profile which can happen outside of startup. I
> think it'll be less confusing this way.
> LMK, I'll hold off on submitting for a bit.

SG, still lgtm.

[rkaplow, 2015-02-13 23:34:01]

The CQ bit was checked by rkaplow@chromium.org

[commit-bot: I haz the power, 2015-02-13 23:35:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/928633002/20001

[commit-bot: I haz the power, 2015-02-14 00:28:17]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-02-14 00:28:18]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[rkaplow, 2015-02-14 15:58:06]

The CQ bit was checked by rkaplow@chromium.org

[commit-bot: I haz the power, 2015-02-14 15:59:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/928633002/20001

[commit-bot: I haz the power, 2015-02-14 16:30:02]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-14 16:31:01]

Patchset 2 (id:??) landed as
https://crrev.com/e65c2ff204265d61af3734c6be6e7eb3fa8c3e66
Cr-Commit-Position: refs/heads/master@{#316391}