Reland 'Additional HandleScopes to limit Handle consumption.'

Reland 'Additional HandleScopes to limit Handle consumption.'

v8 builds with --no-snap were hitting handle limits compiling natives for handle count unit tests that run with --check_handle_count. Patch now has higher handle limits (~4k more than required for failing natives compilation).

Original issue: https://codereview.chromium.org/1185633002/

Original issue's description:
    > Additional HandleScopes to limit Handle consumption.
    >
    > erikcorry@chromium.org suggested digging into v8 handle usage. Found potential scopes in ast.cc and runtime-literals.cc and added tests.
    >
    > The runtime-literals.cc change reduces peak handles in imaging-darkroom.js from 1,282,610 to 428,218. The ast.cc change reduces the peak handles in string-t
agcloud.js from 80,738 to 8,176.
    >
    > No significant handle count issues found with major websites, but substantial savings on some benchmarks and demos:
    >
    > Kraken's imaging-darkroom.js down from 1,282,610 to 428,218 due to runtime-literals.cc scope.
    > SunSpider's string-tagcloud.js down from 80,738 to 8.176 due to ast.cc
    >
    > http://www.flohofwoe.net/demos/dragons_asmjs.html (738,906 -> 478,296)
    > http://www.flohofwoe.net/demos/instancing_asmjs.html (737,884 -> 477,274)
    > https://dl.dropboxusercontent.com/u/16662598/Ports/DOSBox-web/doom.html?engine=dosbox-growth.js (1,724,114 -> 1,087,408)
    > https://kripken.github.io/ammo.js/examples/new/ammo.html (175,784 -> 142,058)
    >
    > BUG=
    >
    > Committed: https://crrev.com/3a4c7538839186aa38910c66c986abb563f4ccd2
    > Cr-Commit-Position: refs/heads/master@{#29155}

BUG=

Committed: https://crrev.com/af4c4b0427c44e74520d61f328f258b365ba233d
Cr-Commit-Position: refs/heads/master@{#29322}

[oth, 2015-06-22 10:10:56]

oth@chromium.org changed reviewers:
+ erikcorry@chromium.org, rmcilroy@chromium.org, yangguo@chromium.org

[oth, 2015-06-22 10:11:07]

The CQ bit was checked by oth@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-06-22 10:11:14]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1192743005/1

[commit-bot: I haz the power, 2015-06-22 10:11:17]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-22 10:11:17]

Dry run: No L-G-T-M from a valid reviewer yet. Only full committers are
accepted.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[oth, 2015-06-22 10:29:13]

oth@chromium.org changed reviewers:
- erikcorry@chromium.org, rmcilroy@chromium.org, yangguo@chromium.org

[oth, 2015-06-22 10:38:24]

oth@chromium.org changed reviewers:
+ erikcorry@chromium.org, rmcilroy@chromium.org, yangguo@chromium.org

[oth, 2015-06-22 10:38:24]

PTAL - attempting to reland handle count patch. This change just increases
handle count limit from 16K to 30K. This is ample to compile natives and run the
check_handle_count unit tests on failing bots.

[rmcilroy, 2015-06-26 08:27:28]

On 2015/06/22 10:38:24, orion wrote:
> PTAL - attempting to reland handle count patch. This change just increases
> handle count limit from 16K to 30K. This is ample to compile natives and run
the
> check_handle_count unit tests on failing bots.

lgtm.

[oth, 2015-06-26 09:47:07]

The CQ bit was checked by oth@chromium.org to run a CQ dry run

[oth, 2015-06-26 09:47:08]

The patchset sent to the CQ was uploaded after l-g-t-m from
rmcilroy@chromium.org
Link to the patchset: https://codereview.chromium.org/1192743005/#ps20001
(title: "Rebase")

[commit-bot: I haz the power, 2015-06-26 09:47:21]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1192743005/20001

[commit-bot: I haz the power, 2015-06-26 10:29:22]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-26 10:29:22]

Dry run: This issue passed the CQ dry run.

[oth, 2015-06-26 10:56:01]

The CQ bit was checked by oth@chromium.org

[commit-bot: I haz the power, 2015-06-26 10:56:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1192743005/20001

[commit-bot: I haz the power, 2015-06-26 10:58:13]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-06-26 10:58:33]

Patchset 2 (id:??) landed as
https://crrev.com/af4c4b0427c44e74520d61f328f258b365ba233d
Cr-Commit-Position: refs/heads/master@{#29322}