[PartitionAlloc] Fix type names in fast malloc macro

[PartitionAlloc] Fix type names in fast malloc macro

The type name in the |USING_FAST_MALLOC| macro is currently not used,
which allowed a few typos to sneak in. This fixes those to prevent
compile errors in case the type name is used in the future.

Committed: https://crrev.com/ddc763cdec5788f27da528d35ab31a3428a1fc84
Cr-Commit-Position: refs/heads/master@{#360569}

[Ruud van Asseldonk, 2015-11-19 12:03:13]

ruuda@google.com changed reviewers:
+ haraken@chromium.org

[Ruud van Asseldonk, 2015-11-19 12:03:13]

haraken, can you please take a look at this four-line change?

[haraken, 2015-11-19 12:05:11]

LGTM

[haraken, 2015-11-19 12:05:15]

LGTM

[Ruud van Asseldonk, 2015-11-19 12:08:11]

The CQ bit was checked by ruuda@google.com

[commit-bot: I haz the power, 2015-11-19 12:08:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1461743004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1461743004/1

[commit-bot: I haz the power, 2015-11-19 13:05:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-19 13:05:58]

Patchset 1 (id:??) landed as
https://crrev.com/ddc763cdec5788f27da528d35ab31a3428a1fc84
Cr-Commit-Position: refs/heads/master@{#360569}