Revert of Add record-as-much-as-possible mode for about://tracing.

Revert of Add record-as-much-as-possible mode for about://tracing. (patchset #1 id:1 of https://codereview.chromium.org/1033223008/)

Reason for revert:
Speculative revert to see if this cause 340kb increase in size (BUG=471610
)

Original issue's description:
> Add record-as-much-as-possible mode for about://tracing.
>
> Update DEPS for trace-viewer to include the 3 tracing modes selector.
>
> BUG=396081
> TEST=
>
> Committed: https://crrev.com/8e752353b04c52cb3ba1d54b79fce241c0be53d3
> Cr-Commit-Position: refs/heads/master@{#322689}

TBR=nduca@chromium.org,nduca@google.com

BUG=396081
Committed: https://crrev.com/bd28da0bfa3c2105937e61c6fe806c7ba7d43f01
Cr-Commit-Position: refs/heads/master@{#322853}

[nednguyen, 2015-03-30 18:59:57]

Created Revert of Add record-as-much-as-possible mode for about://tracing.

[nednguyen, 2015-03-30 19:00:13]

The CQ bit was checked by nednguyen@google.com

[commit-bot: I haz the power, 2015-03-30 19:00:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1043973003/1

[commit-bot: I haz the power, 2015-03-30 20:28:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-30 20:30:54]

Patchset 1 (id:??) landed as
https://crrev.com/bd28da0bfa3c2105937e61c6fe806c7ba7d43f01
Cr-Commit-Position: refs/heads/master@{#322853}

[nednguyen, 2015-03-30 23:49:37]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1045123003/ by nednguyen@google.com.

The reason for reverting is: Size increase in
https://code.google.com/p/chromium/issues/detail?id=471610 is WAI..