wtf: Eliminate inliner abuse in saturatedSet function.

wtf: Eliminate inliner abuse in saturatedSet function.

The two overloads of the saturateSet function previously took an argument,
FractionalShift, of type int, which they passed to an inline asm block using
an "n" (integer immediate) constraint. This meant that the function could
not be compiled on its own if its address was taken (either directly or via
e.g. -finstrument-functions), as FractionalShift would not be a constant.

Fix this by passing FractionalShift as a template parameter. This lets us
remove its header file from the -finstrument-functions blacklist.

BUG=539408
R=thakis@chromium.org

Committed: https://crrev.com/3f68f09657fbab2d69bd253f163c8c1ec08d9759
Cr-Commit-Position: refs/heads/master@{#360696}

[Nico, 2015-11-19 05:06:20]

Huh, so this only compiled by accident 'cause this function was inlined at every
call site?

lgtm

[pcc1, 2015-11-19 21:07:29]

The CQ bit was checked by pcc@chromium.org

[commit-bot: I haz the power, 2015-11-19 21:09:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1456173004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1456173004/1

[commit-bot: I haz the power, 2015-11-19 23:15:37]

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

[commit-bot: I haz the power, 2015-11-19 23:15:38]

Try jobs failed on following builders:
  ios_dbg_simulator_ninja on tryserver.chromium.mac (JOB_TIMED_OUT, no build
URL)

[pcc1, 2015-11-19 23:16:25]

The CQ bit was checked by pcc@chromium.org

[commit-bot: I haz the power, 2015-11-19 23:19:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1456173004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1456173004/1

[commit-bot: I haz the power, 2015-11-20 00:33:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-20 00:34:37]

Patchset 1 (id:??) landed as
https://crrev.com/3f68f09657fbab2d69bd253f163c8c1ec08d9759
Cr-Commit-Position: refs/heads/master@{#360696}