Fix some -Werror=sign-compare errors

Fix some -Werror=sign-compare errors

R=svenpanne@chromium.org
LOG=N
BUG=

Committed: https://crrev.com/fe031978cbd4fbe589cf6d5e6aca291b611f1adb
Cr-Commit-Position: refs/heads/master@{#27752}

[wingo, 2015-04-10 08:15:57]

Found while compiling with GCC 4.9.2.

[Sven Panne, 2015-04-10 13:09:28]

The CQ bit was checked by svenpanne@chromium.org

[Sven Panne, 2015-04-10 13:09:28]

lgtm

https://codereview.chromium.org/1072333002/diff/1/test/cctest/test-cpu-profil...
File test/cctest/test-cpu-profiler.cc (right):

https://codereview.chromium.org/1072333002/diff/1/test/cctest/test-cpu-profil...
test/cctest/test-cpu-profiler.cc:1724: CHECK_EQ(1U,
iopt_function->deopt_infos().size());
To *really* be on the safe side, one would have to use:

   static_cast<std::vector<CpuProfileDeoptInfo>::size_type>(1)

But I think the "U" suffix is good enough for now. :-)

[commit-bot: I haz the power, 2015-04-10 13:09:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1072333002/1

[commit-bot: I haz the power, 2015-04-10 13:59:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-10 13:59:55]

Patchset 1 (id:??) landed as
https://crrev.com/fe031978cbd4fbe589cf6d5e6aca291b611f1adb
Cr-Commit-Position: refs/heads/master@{#27752}