Revert of [Tracing] Create TracingCategoryObserver in gin/.

Revert of [Tracing] Create TracingCategoryObserver in gin/. (patchset #2 id:20001 of https://codereview.chromium.org/2456073004/ )

Reason for revert:
Revert this patch because clusterfuzz complains about bad casting.

Original issue's description:
> [Tracing] Create TracingCategoryObserver in gin/.
>
> Previously we implemented TracingCategoryObserver in V8 in order to do fast
> category check when we enable V8 specific tracing feature in a unified way.
> This patch calls the the creation of TracingCategoryObserver from chrome and
> adds it to observer list.
>
> BUG=v8:5590
>
> Committed: https://crrev.com/f3b25db89a2dfaad59a90573fe355bc60db0a899
> Cr-Commit-Position: refs/heads/master@{#428756}

TBR=jochen@chromium.org,fmeawad@chromium.org,alph@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:5590
Committed: https://crrev.com/241ab2fc21762ba47c4a3a088c10338f47a87359
Cr-Commit-Position: refs/heads/master@{#429160}

[lpy, 2016-11-01 22:32:10]

The CQ bit was checked by lpy@chromium.org

[lpy, 2016-11-01 22:32:11]

Created Revert of [Tracing] Create TracingCategoryObserver in gin/.

[commit-bot: I haz the power, 2016-11-01 22:32:58]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-01 22:33:00]

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

[commit-bot: I haz the power, 2016-11-01 22:33:00]

No L-G-T-M from a valid reviewer yet. 
CQ run can only be started by full committers or once the patch has
received an L-G-T-M from a full committer.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[fmeawad, 2016-11-01 22:33:32]

lgtm

[lpy, 2016-11-01 22:33:52]

The CQ bit was checked by lpy@chromium.org

[commit-bot: I haz the power, 2016-11-01 22:34:41]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-01 23:02:54]

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

[commit-bot: I haz the power, 2016-11-01 23:02:55]

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

[lpy, 2016-11-01 23:04:06]

The CQ bit was checked by lpy@chromium.org

[commit-bot: I haz the power, 2016-11-01 23:04:33]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-02 00:28:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-02 00:31:02]

Description was changed from

==========
Revert of [Tracing] Create TracingCategoryObserver in gin/. (patchset #2
id:20001 of https://codereview.chromium.org/2456073004/ )

Reason for revert:
Revert this patch because clusterfuzz complains about bad casting.

Original issue's description:
> [Tracing] Create TracingCategoryObserver in gin/.
> 
> Previously we implemented TracingCategoryObserver in V8 in order to do fast
> category check when we enable V8 specific tracing feature in a unified way.
> This patch calls the the creation of TracingCategoryObserver from chrome and
> adds it to observer list.
> 
> BUG=v8:5590
> 
> Committed: https://crrev.com/f3b25db89a2dfaad59a90573fe355bc60db0a899
> Cr-Commit-Position: refs/heads/master@{#428756}

TBR=jochen@chromium.org,fmeawad@chromium.org,alph@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:5590
==========

to

==========
Revert of [Tracing] Create TracingCategoryObserver in gin/. (patchset #2
id:20001 of https://codereview.chromium.org/2456073004/ )

Reason for revert:
Revert this patch because clusterfuzz complains about bad casting.

Original issue's description:
> [Tracing] Create TracingCategoryObserver in gin/.
>
> Previously we implemented TracingCategoryObserver in V8 in order to do fast
> category check when we enable V8 specific tracing feature in a unified way.
> This patch calls the the creation of TracingCategoryObserver from chrome and
> adds it to observer list.
>
> BUG=v8:5590
>
> Committed: https://crrev.com/f3b25db89a2dfaad59a90573fe355bc60db0a899
> Cr-Commit-Position: refs/heads/master@{#428756}

TBR=jochen@chromium.org,fmeawad@chromium.org,alph@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:5590

Committed: https://crrev.com/241ab2fc21762ba47c4a3a088c10338f47a87359
Cr-Commit-Position: refs/heads/master@{#429160}
==========

[commit-bot: I haz the power, 2016-11-02 00:31:03]

Patchset 1 (id:??) landed as
https://crrev.com/241ab2fc21762ba47c4a3a088c10338f47a87359
Cr-Commit-Position: refs/heads/master@{#429160}