Fix format string to handle pointers correctly.

Fix format string to handle pointers correctly.

I chose to use %Id and a cast rather than %p in order to continue
printing as decimal -- %p typically prints as hex.

%Id is not portable, but this is Windows only code and %zd is not yet
supported in VC++.

BUG=427616
Committed: https://crrev.com/447ac5e77775c03acb6513e69c05ba1e6aceab47
Cr-Commit-Position: refs/heads/master@{#307156}

[brucedawson, 2014-12-05 20:05:18]

brucedawson@chromium.org changed reviewers:
+ cpu@chromium.org

[cpu_(ooo_6.6-7.5), 2014-12-05 21:48:41]

lgtm

[cpu_(ooo_6.6-7.5), 2014-12-05 21:48:43]

The CQ bit was checked by cpu@chromium.org

[commit-bot: I haz the power, 2014-12-05 21:50:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/786493003/1

[commit-bot: I haz the power, 2014-12-05 22:11:24]

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

[commit-bot: I haz the power, 2014-12-05 22:11:25]

Try jobs failed on following builders:
  win8_chromium_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_rel...)
  win_chromium_rel_ng on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[brucedawson, 2014-12-05 22:28:08]

I just fixed a compile error which I introduced at the last minute in the
previous version -- now it uses reinterpret_cast instead of static_cast,
necessary to convert from pointer to size_t.

Take another look?

[cpu_(ooo_6.6-7.5), 2014-12-06 03:37:48]

still lgtm

[cpu_(ooo_6.6-7.5), 2014-12-06 03:37:51]

The CQ bit was checked by cpu@chromium.org

[commit-bot: I haz the power, 2014-12-06 03:38:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/786493003/20001

[commit-bot: I haz the power, 2014-12-06 04:35:40]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-12-06 04:36:19]

Patchset 2 (id:??) landed as
https://crrev.com/447ac5e77775c03acb6513e69c05ba1e6aceab47
Cr-Commit-Position: refs/heads/master@{#307156}