Read all integer op parameters using a signed integer type.

Read all integer op parameters using a signed integer type.

The code was previously reading unsigned integers by performing an invalid cast
of Operator1<intNN_t> objects to Operator1<uintNN_t> and reading the integer
directly. To fix the invalid cast, we cast to the correct type and static_cast
the integer to uintNN_t, which is a no-op on every reasonable target.

Cleanup for cfi_vptr=1; see https://www.chromium.org/developers/testing/control-flow-integrity

BUG=chromium:457523
R=bmeurer@chromium.org
LOG=N

Committed: https://crrev.com/e67f5cf4b8211a2d12e1ce50ab1ee5ec0d00c3ce
Cr-Commit-Position: refs/heads/master@{#30499}

[Benedikt Meurer, 2015-09-01 04:03:58]

LGTM

[pcc1, 2015-09-01 04:16:30]

The CQ bit was checked by pcc@chromium.org

[commit-bot: I haz the power, 2015-09-01 04:16:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1310633004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1310633004/1

[commit-bot: I haz the power, 2015-09-01 06:16:46]

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

[commit-bot: I haz the power, 2015-09-01 06:16:47]

Try jobs failed on following builders:
  v8_linux_rel on tryserver.v8 (JOB_TIMED_OUT, no build URL)

[pcc1, 2015-09-01 08:50:25]

The CQ bit was checked by pcc@chromium.org

[commit-bot: I haz the power, 2015-09-01 08:50:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1310633004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1310633004/1

[commit-bot: I haz the power, 2015-09-01 09:11:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-01 09:11:18]

Patchset 1 (id:??) landed as
https://crrev.com/e67f5cf4b8211a2d12e1ce50ab1ee5ec0d00c3ce
Cr-Commit-Position: refs/heads/master@{#30499}