Re-enable blink_perf.canvas on Windows

Re-enable blink_perf.canvas on Windows

Did 50 runs locally to confirm that this is working.

BUG=455796
CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:linux_perf_bisect;tryserver.chromium.perf:mac_perf_bisect;tryserver.chromium.perf:win_perf_bisect;tryserver.chromium.perf:android_nexus5_perf_bisect
NOTRY=true

Committed: https://crrev.com/5f96344d51668f35d7a1ba4f701b4eabf0718dd3
Cr-Commit-Position: refs/heads/master@{#330097}

[Sami, 2015-05-14 12:49:25]

skyostil@chromium.org changed reviewers:
+ primiano@chromium.org

[Primiano Tucci (use gerrit), 2015-05-14 14:45:11]

lgtm

[Sami, 2015-05-15 14:23:29]

The CQ bit was checked by skyostil@chromium.org

[commit-bot: I haz the power, 2015-05-15 14:23:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1129203004/1

[commit-bot: I haz the power, 2015-05-15 15:02:35]

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

[commit-bot: I haz the power, 2015-05-15 15:02:36]

Try jobs failed on following builders:
  linux_perf_bisect on tryserver.chromium.perf (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.perf/builders/linux_perf_bisec...)

[Sami, 2015-05-15 15:22:03]

The CQ bit was checked by skyostil@chromium.org

[commit-bot: I haz the power, 2015-05-15 15:22:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1129203004/1

[commit-bot: I haz the power, 2015-05-15 15:25:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-15 15:26:49]

Patchset 1 (id:??) landed as
https://crrev.com/5f96344d51668f35d7a1ba4f701b4eabf0718dd3
Cr-Commit-Position: refs/heads/master@{#330097}