Fix zlib_uncompress_fuzzer failure on Windows

Fix zlib_uncompress_fuzzer failure on Windows

- fix zlib_uncompress_fuzzer build failure on Windows:
  change buffer_length from size_t to uLongf
- fix zlib_uncompress_fuzzer run failure on Windows:
  use buffer from heap instead of stack to avoid _chkstk failure

R=aizatsky@chromium.org
BUG=NONE

Committed: https://crrev.com/8c375fbf2c234840400f28e8cf0303eddaa1dfca
Cr-Commit-Position: refs/heads/master@{#371320}

[aizatsky, 2016-01-25 20:38:52]

lgtm

[zhaoqin1, 2016-01-25 21:08:35]

The CQ bit was checked by zhaoqin@chromium.org

[commit-bot: I haz the power, 2016-01-25 21:10:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1635703002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1635703002/1

[commit-bot: I haz the power, 2016-01-25 21:40:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-25 21:41:00]

Description was changed from

==========
Fix zlib_uncompress_fuzzer failure on Windows

- fix zlib_uncompress_fuzzer build failure on Windows:
  change buffer_length from size_t to uLongf
- fix zlib_uncompress_fuzzer run failure on Windows:
  use buffer from heap instead of stack to avoid _chkstk failure

R=aizatsky@chromium.org
BUG=NONE
==========

to

==========
Fix zlib_uncompress_fuzzer failure on Windows

- fix zlib_uncompress_fuzzer build failure on Windows:
  change buffer_length from size_t to uLongf
- fix zlib_uncompress_fuzzer run failure on Windows:
  use buffer from heap instead of stack to avoid _chkstk failure

R=aizatsky@chromium.org
BUG=NONE

Committed: https://crrev.com/8c375fbf2c234840400f28e8cf0303eddaa1dfca
Cr-Commit-Position: refs/heads/master@{#371320}
==========

[commit-bot: I haz the power, 2016-01-25 21:41:01]

Patchset 1 (id:??) landed as
https://crrev.com/8c375fbf2c234840400f28e8cf0303eddaa1dfca
Cr-Commit-Position: refs/heads/master@{#371320}