[Interpreter] Remove unnecessary const specifiers on scalar types.

[Interpreter] Remove unnecessary const specifiers on scalar types.

BUG=v8:4280
LOG=N

Committed: https://crrev.com/e6e3c6a840035588811f0a208cbe6f9c0f3d53cc
Cr-Commit-Position: refs/heads/master@{#29961}

[oth, 2015-07-31 10:01:43]

oth@chromium.org changed reviewers:
+ rmcilroy@chromium.org, titzer@chromium.org

[oth, 2015-07-31 10:01:43]

PTAL, thanks!

[rmcilroy, 2015-07-31 10:35:21]

On 2015/07/31 10:01:43, oth wrote:
> PTAL, thanks!

lgtm, thanks!

[titzer, 2015-07-31 11:10:32]

lgtm

[oth, 2015-08-01 06:54:59]

The CQ bit was checked by oth@chromium.org

[commit-bot: I haz the power, 2015-08-01 06:55:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1269813006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1269813006/1

[commit-bot: I haz the power, 2015-08-01 06:57:16]

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

[commit-bot: I haz the power, 2015-08-01 06:57:17]

Try jobs failed on following builders:
  v8_presubmit on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_presubmit/builds/4613)

[oth, 2015-08-01 07:23:20]

The CQ bit was checked by oth@chromium.org

[commit-bot: I haz the power, 2015-08-01 07:23:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1269813006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1269813006/1

[commit-bot: I haz the power, 2015-08-01 07:25:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-01 07:25:39]

Patchset 1 (id:??) landed as
https://crrev.com/e6e3c6a840035588811f0a208cbe6f9c0f3d53cc
Cr-Commit-Position: refs/heads/master@{#29961}