Revert of Reland [Startup Tracing] Add --trace-config-file flag

Revert of Reland [Startup Tracing] Add --trace-config-file flag (patchset #2 id:20001 of https://codereview.chromium.org/1317333002/ )

Reason for revert:
Broke build at Win x64 GN. Failure sample:
http://build.chromium.org/p/chromium.win/builders/Win%20x64%20GN%20%28dbg%29/builds/8575

Original issue's description:
> Reland [Startup Tracing] Add --trace-config-file flag
>
> Original CL: https://codereview.chromium.org/1315463002/
>
> This CL adds --trace-config-file flag. Please see trace_config_file.h for details.
>
> Design doc:
> https://docs.google.com/document/d/1PgdXUOJF3WtEmYWUyGRbC2Fz2ICCZKO9jPvpLPRSHH8/edit?usp=sharing
>
> BUG=317481, 482098
> TBR=dsinclair@chromium.org,blundell@chromium.org,sievers@chromium.org,sky@chromium.org,msw@chromium.org
>
> Committed: https://crrev.com/a556ab616a3817468a9bd2163383dafe24ffdc96
> Cr-Commit-Position: refs/heads/master@{#346189}

TBR=dsinclair@chromium.org,blundell@chromium.org,sievers@chromium.org,msw@chromium.org,sky@chromium.org,zhenw@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=317481, 482098
Committed: https://crrev.com/1eab556bee2e0ff9c2d2cec7983253d52bc998d9
Cr-Commit-Position: refs/heads/master@{#346206}

[sergeyv, 2015-08-28 19:09:39]

Created Revert of Reland [Startup Tracing] Add --trace-config-file flag

[commit-bot: I haz the power, 2015-08-28 19:10:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1312833007/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1312833007/1

[commit-bot: I haz the power, 2015-08-28 19:12:19]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-28 19:13:11]

Patchset 1 (id:??) landed as
https://crrev.com/1eab556bee2e0ff9c2d2cec7983253d52bc998d9
Cr-Commit-Position: refs/heads/master@{#346206}