Use CheckedNumerics in AsyncPixelTransfersCompletedQuery, add tests

Use CheckedNumerics in AsyncPixelTransfersCompletedQuery, add tests

This is a follow-up to https://codereview.chromium.org/198253002/
1- It converts the code to use CheckedNumerics
2- It adds unit tests:
  * converts existing tests to exercise all query types
  * adds an additional test to exercise overflow explicitly
3- Fixes a minor issue with GL_ASYNC_PIXEL_PACK_COMPLETED_CHROMIUM, where
out-of-bounds access would be silently failing instead of losing the context.

BUG=351852
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=256918

[piman, 2014-03-13 00:22:48]

(this was separated out for easier merging of the previous CL)

[jschuh, 2014-03-13 01:57:11]

lgtm on the security side

[jbauman, 2014-03-13 02:45:14]

lgtm

[piman, 2014-03-13 04:48:16]

The CQ bit was checked by piman@chromium.org

[commit-bot: I haz the power, 2014-03-13 04:48:23]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/piman@chromium.org/196633009/10001

[commit-bot: I haz the power, 2014-03-13 05:41:40]

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

[commit-bot: I haz the power, 2014-03-13 05:41:41]

Retried try job too often on win_rel for step(s) app_list_unittests,
ash_unittests, aura_unittests, base_unittests, browser_tests,
cacheinvalidation_unittests, cc_unittests, check_deps, check_deps2git,
chrome_elf_unittests, chromedriver_unittests, components_unittests,
compositor_unittests, content_browsertests, content_unittests, crypto_unittests,
events_unittests, gfx_unittests, google_apis_unittests, gpu_unittests,
installer_util_unittests, interactive_ui_tests, ipc_tests, jingle_unittests,
media_unittests, mini_installer_test, nacl_integration, net_unittests,
ppapi_unittests, printing_unittests, remoting_unittests, sql_unittests,
sync_integration_tests, sync_unit_tests, telemetry_perf_unittests,
telemetry_unittests, unit_tests, views_unittests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[piman, 2014-03-13 18:12:07]

The CQ bit was checked by piman@chromium.org

[commit-bot: I haz the power, 2014-03-13 18:15:06]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/piman@chromium.org/196633009/20001

[commit-bot: I haz the power, 2014-03-13 20:35:28]

Change committed as 256918