Revert of Make ui/gl depend on the necessary runtime targets on Windows.

Revert of Make ui/gl depend on the necessary runtime targets on Windows. (patchset #3 id:40001 of https://codereview.chromium.org/1070933002/)

Reason for revert:
This CL introduces a typo to the GN build file, so that Windows GN builds fail.

It should be possible to reland after below line is changed from appending to assignment.

ERROR at //ui/gl/BUILD.gn:203:5: Undefined variable for +=.
    data_deps += [
    ^--------
I don't have something with this name in scope now.

See: http://build.chromium.org/p/chromium.win/builders/Win8%20GN

Original issue's description:
> Make ui/gl depend on the necessary runtime targets on Windows.
>
> Committed: https://crrev.com/f4a6e44ff20c29a6410a698a06a45dd11666ef53
> Cr-Commit-Position: refs/heads/master@{#324320}

TBR=brettw@chromium.org,scottmg@chromium.org,jam@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/be9f5401881a86655d188802c8f54e67ddc4e538
Cr-Commit-Position: refs/heads/master@{#324404}

[engedy, 2015-04-09 09:43:21]

Created Revert of Make ui/gl depend on the necessary runtime targets on Windows.

[commit-bot: I haz the power, 2015-04-09 09:43:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1071113002/1

[commit-bot: I haz the power, 2015-04-09 09:44:20]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-09 09:45:10]

Patchset 1 (id:??) landed as
https://crrev.com/be9f5401881a86655d188802c8f54e67ddc4e538
Cr-Commit-Position: refs/heads/master@{#324404}

[engedy, 2015-04-09 09:49:51]

On second thought, it is probably a better idea to define this as an empty list
before the platform-specific sections.

[engedy, 2015-04-09 10:49:57]

Also, we could consider adding a Windows GN trybot so that these kinds of
mistakes can be caught in the future.