Enable MSVC warning C4018 for various directories that seem to pass as-is.

Enable MSVC warning C4018 for various directories that seem to pass as-is.

BUG=398202
TEST=none
TBR=brettw

Committed: https://crrev.com/513df87e8724587dc7be0d27a5f79652275c0767
Cr-Commit-Position: refs/heads/master@{#339602}

[Peter Kasting, 2015-07-20 23:22:19]

pkasting@chromium.org changed reviewers:
+ brettw@chromium.org

[Peter Kasting, 2015-07-21 02:04:45]

(TBRing this since it's mechanical)

[Peter Kasting, 2015-07-21 02:04:47]

The CQ bit was checked by pkasting@chromium.org

[commit-bot: I haz the power, 2015-07-21 02:05:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1246863002/20001

[commit-bot: I haz the power, 2015-07-21 02:46:30]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-07-21 02:47:18]

Patchset 2 (id:??) landed as
https://crrev.com/513df87e8724587dc7be0d27a5f79652275c0767
Cr-Commit-Position: refs/heads/master@{#339602}

[Matt Giuca, 2015-07-21 03:13:41]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/1242333005/ by mgiuca@chromium.org.

The reason for reverting is: Got a signed/unsigned mismatch warning on GPU Win
Builder:
http://build.chromium.org/p/chromium.gpu/builders/GPU%20Win%20Builder/builds/...

c:\b\build\slave\gpu_win_builder\build\src\third_party\gles2_conform\gtf_es\glsl\gtf\source\gl2fixedtests\gtffixedtestvertexorder.c(58)
:error C2220: warning treated as error - no 'object' file generated
c:\b\build\slave\gpu_win_builder\build\src\third_party\gles2_conform\gtf_es\glsl\gtf\source\gl2fixedtests\gtffixedtestvertexorder.c(58)
: warning C4018: '<' : signed/unsigned mismatch

Please re-land without the change to gles2_conform_test.gyp..

[Matt Giuca, 2015-07-21 03:19:45]

> Please re-land without the change to gles2_conform_test.gyp..

Actually, I just reverted that one file so no need to reland the other changes.