Correct handling of temporaries as parameters.

Correct handling of temporaries as parameters.

They need to be properly recorded in the scope's temps set, otherwise allocation doesn't know about them and can break. (Not observable right now, but necessary for follow-up changes to parameter destructuring.)

Also, print temporary variables in a useful manner.

R=adamk@chromium.org
BUG=

Committed: https://crrev.com/222b70d10ff00e67183f1779022e404f1bf9d746
Cr-Commit-Position: refs/heads/master@{#29998}

[adamk, 2015-07-30 17:08:52]

lgtm

[rossberg, 2015-08-04 12:38:20]

The CQ bit was checked by rossberg@chromium.org

[commit-bot: I haz the power, 2015-08-04 12:38:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1263563002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1263563002/1

[commit-bot: I haz the power, 2015-08-04 13:03:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-04 13:04:04]

Patchset 1 (id:??) landed as
https://crrev.com/222b70d10ff00e67183f1779022e404f1bf9d746
Cr-Commit-Position: refs/heads/master@{#29998}