Revert of Properly escape node names in DependencyGraph Graphviz export

Revert of Properly escape node names in DependencyGraph Graphviz export (patchset #4 id:80001 of https://codereview.chromium.org/1414053004/ )

Reason for revert:
Broke win 64 builds:

e:\b\build\slave\win_x64_gn__dbg_\build\src\components\keyed_service\core\dependency_graph_unittest.cc(175) : error C2220: warning treated as error - no 'object' file generated
e:\b\build\slave\win_x64_gn__dbg_\build\src\components\keyed_service\core\dependency_graph_unittest.cc(175) : warning C4267: 'argument' : conversion from 'size_t' to 'int', possible loss of data
e:\b\build\slave\win_x64_gn__dbg_\build\src\components\keyed_service\core\dependency_graph_unittest.cc(184) : warning C4267: 'argument' : conversion from 'size_t' to 'int', possible loss of data

http://build.chromium.org/p/chromium.win/builders/Win%20x64%20GN%20%28dbg%29/builds/12333

Original issue's description:
> Properly escape node names in DependencyGraph Graphviz export
>
> BUG=546954
>
> Committed: https://crrev.com/6918fc7520a841b427e97f45f2f250480b93556b
> Cr-Commit-Position: refs/heads/master@{#356255}

TBR=erg@chromium.org,tfarina@chromium.org,vabr@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=546954
Committed: https://crrev.com/943cfb5e8fb4d9237f202ddf1843e27828c1d72a
Cr-Commit-Position: refs/heads/master@{#356355}

[dcaiafa, 2015-10-27 18:47:00]

Created Revert of Properly escape node names in DependencyGraph Graphviz export

[commit-bot: I haz the power, 2015-10-27 18:47:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1419843006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1419843006/1

[commit-bot: I haz the power, 2015-10-27 18:49:37]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-27 18:50:31]

Patchset 1 (id:??) landed as
https://crrev.com/943cfb5e8fb4d9237f202ddf1843e27828c1d72a
Cr-Commit-Position: refs/heads/master@{#356355}

[vabr (Chromium), 2015-10-28 11:09:10]

On 2015/10/27 18:50:31, commit-bot: I haz the power wrote:
> Patchset 1 (id:??) landed as
> https://crrev.com/943cfb5e8fb4d9237f202ddf1843e27828c1d72a
> Cr-Commit-Position: refs/heads/master@{#356355}

Thanks for the revert, LGTM.