MIPS: Parsing: Make Scope not know about Isolate.

MIPS: Parsing: Make Scope not know about Isolate.

Port 5d68529be240a1fc9fcc67c8950ead4baf7604e4

Original commit message:
Scope, like Parser, must be able to operate independent of Isolate and the V8
heap (for background parsing). After the heap-independent phase, there is a heap
dependent phase, during which we do operations such as scope anaylysis.

This CL makes the phases explicit by not telling Scope about the Isolate too
early (during the heap-independent phase, Scope should know nothing about
Isolate). This decreases the probability of accidental code changes which would
add heap-dependent operations into the heap-independent phase.

BUG=

Committed: https://crrev.com/4dbfde37110b7108842829ee3cc17104816b1392
Cr-Commit-Position: refs/heads/master@{#26553}

[balazs.kilvady, 2015-02-10 17:57:53]

balazs.kilvady@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, danno@chromium.org, dusan.milosavljevic@imgtec.com,
gergely.kis@imgtec.com, marja@chromium.org, paul.lind@imgtec.com

[dusmil.imgtec, 2015-02-10 17:59:34]

lgtm.

[marja, 2015-02-10 18:00:05]

lgtm

[balazs.kilvady, 2015-02-10 18:00:12]

The CQ bit was checked by balazs.kilvady@imgtec.com

[commit-bot: I haz the power, 2015-02-10 18:00:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/911073004/1

[commit-bot: I haz the power, 2015-02-10 19:09:34]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-10 19:09:49]

Patchset 1 (id:??) landed as
https://crrev.com/4dbfde37110b7108842829ee3cc17104816b1392
Cr-Commit-Position: refs/heads/master@{#26553}