Add function literal variable to declaration list.

Add function literal variable to declaration list.

This adds the implicit function variable for a function literal to the
declarations list in scope analysis, instead of specially handling it
throughout all back-ends.

R=rossberg@chromium.org

Committed: https://crrev.com/ce6d2241bcf4647315337b60f98dee3b07ac82bd
Cr-Commit-Position: refs/heads/master@{#29754}

[rossberg, 2015-07-20 14:09:56]

lgtm

[Michael Starzinger, 2015-07-20 14:13:05]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2015-07-20 14:13:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1245603003/1

[commit-bot: I haz the power, 2015-07-20 14:15:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-20 14:15:24]

Patchset 1 (id:??) landed as
https://crrev.com/ce6d2241bcf4647315337b60f98dee3b07ac82bd
Cr-Commit-Position: refs/heads/master@{#29754}