Mechanical rename of base::debug -> base::trace_event [final pass].

Mechanical rename of base::debug -> base::trace_event [final pass]

This is the last stage of the trace_event directory restructuring.
This is part of a set of 3 CLs which is moving tracing clients to use
the new base::trace_debug namespace.
See crrev.com/837303004 and the related bug for motivations.

BUG=451032
TBR=jam@chromium.org

Committed: https://crrev.com/759dd8c5b9b2ece67ac0dc8e406436eff5b69d4f
Cr-Commit-Position: refs/heads/master@{#315397}

[ssid, 2015-01-27 17:59:44]

ssid@chromium.org changed reviewers:
+ picksi@chromium.org, primiano@chromium.org

[ssid, 2015-02-03 07:41:00]

Should I split this into small CLs, like what you did for the includes?

[Primiano Tucci (use gerrit), 2015-02-03 10:50:50]

On 2015/02/03 07:41:00, ssid wrote:
> Should I split this into small CLs, like what you did for the includes?

Hmm, I am a bit confused. This is not dealing with ALL the renames, right?
For instance, I can tell this is not renaming namespaces in cc/

[Primiano Tucci (use gerrit), 2015-02-03 11:17:07]

On 2015/02/03 10:50:50, Primiano Tucci wrote:
> On 2015/02/03 07:41:00, ssid wrote:
> > Should I split this into small CLs, like what you did for the includes?
> 
> Hmm, I am a bit confused. This is not dealing with ALL the renames, right?
> For instance, I can tell this is not renaming namespaces in cc/

Ok I just realized that there is another one to deal with cc/.
At this point I would just move the content/ changes here to a separate CL, so
you'd have 3 namespaces rename CLs in total (+ the one where you change the
trace_event files + fwd declaration).

It should be fairly easy to split this.
Just git reset HEAD^, than git add -- content/, commit and send the first CL,
then git add -A and commit and send the remaining CL.

Also please consider having a better title for this CLs, something like

mechanical rename of base::debug -> base::trace_event for /cc

This is a mechanical rename of the namespace used for tracing classes.
This is part of a set of 3 CLs which is moving tracing clients to use
the new base::trace_debug namespace.
See crrev.com/837303004 and the related bug for motivations.

BUG=451032

[ssid, 2015-02-03 15:55:39]

Split the CL. PTAL.

[Primiano Tucci (use gerrit), 2015-02-09 12:07:05]

On 2015/02/03 15:55:39, ssid wrote:
> Split the CL. PTAL.

There are 3 namespaces leftover in
chrome/test/logging/win/log_file_reader.cc
(base::debug::kTraceEventTypeBegin) and friends.
Can you please fix them and add to this cl?

[Primiano Tucci (use gerrit), 2015-02-09 12:17:37]

On 2015/02/09 12:07:05, Primiano Tucci wrote:
> On 2015/02/03 15:55:39, ssid wrote:
> > Split the CL. PTAL.
> 
> There are 3 namespaces leftover in
> chrome/test/logging/win/log_file_reader.cc
> (base::debug::kTraceEventTypeBegin) and friends.
> Can you please fix them and add to this cl?

Also can you remove the  TODO(ssid) and the aliases in trace_event?
If we did everything correctly, at this point nobody should be using them.

[Primiano Tucci (use gerrit), 2015-02-09 12:17:45]

https://codereview.chromium.org/868603007/diff/40001/base/test/trace_event_an...
File base/test/trace_event_analyzer.h (left):

https://codereview.chromium.org/868603007/diff/40001/base/test/trace_event_an...
base/test/trace_event_analyzer.h:75: 
Nit: You accidentally ate this line.

[ssid, 2015-02-09 13:25:36]

On 2015/02/09 12:17:45, Primiano Tucci wrote:
>
https://codereview.chromium.org/868603007/diff/40001/base/test/trace_event_an...
> File base/test/trace_event_analyzer.h (left):
> 
>
https://codereview.chromium.org/868603007/diff/40001/base/test/trace_event_an...
> base/test/trace_event_analyzer.h:75: 
> Nit: You accidentally ate this line.

Made changes, PTAL. 
By mistake ran the try bots, before the other patches land.

[Primiano Tucci (use gerrit), 2015-02-09 18:34:36]

primiano@chromium.org changed reviewers:
+ jam@chromium.org

[Primiano Tucci (use gerrit), 2015-02-09 18:38:55]

PS4 (#60001) LGTM.
I think with this one we are finally done!

TBR-ing jam@ for the miscellaneous changes. Reason for TBR:
 - This consists of purely mechanical changes.
 - The changes are of the same nature made in the other similar CLs, which have
been approved by tracing OWNERs (e.g., crrev.com/882673002, crrev.com/879913002)
 - I have reviewed the CL and verified that after that, no more references to
base::debug::*trace* are left in content/ and the all the remaining TODOs
introduced in
crrev.com/882673002 have been removed.

[Primiano Tucci (use gerrit), 2015-02-09 18:39:01]

The CQ bit was checked by primiano@chromium.org

[commit-bot: I haz the power, 2015-02-09 18:39:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/868603007/60001

[ssid, 2015-02-09 20:13:00]

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

[Primiano Tucci (use gerrit), 2015-02-09 20:31:54]

PS5 LGTM

[Primiano Tucci (use gerrit), 2015-02-09 20:32:03]

The CQ bit was checked by primiano@chromium.org

[commit-bot: I haz the power, 2015-02-09 20:34:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/868603007/80001

[commit-bot: I haz the power, 2015-02-09 21:26:02]

Committed patchset #5 (id:80001)

[commit-bot: I haz the power, 2015-02-09 21:26:52]

Patchset 5 (id:??) landed as
https://crrev.com/759dd8c5b9b2ece67ac0dc8e406436eff5b69d4f
Cr-Commit-Position: refs/heads/master@{#315397}