[Intepreter] Don't throw reference errors for globals in typeof.

[Intepreter] Don't throw reference errors for globals in typeof.

Corrects LdaGlobal to deal with TypeofMode::INSIDE_TYPEOF so that it
doesn't throw a reference error on undefined globals.

BUG=v8:4280
LOG=N

Committed: https://crrev.com/6eb5dae5361773597723dca88e95208dac0b93fe
Cr-Commit-Position: refs/heads/master@{#31757}

[rmcilroy, 2015-11-03 11:01:20]

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

[commit-bot: I haz the power, 2015-11-03 11:01:29]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1422443006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1422443006/1

[rmcilroy, 2015-11-03 11:01:50]

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

[rmcilroy, 2015-11-03 11:01:51]

Orion, PTAL at the interpreter/ changes.
Benedikt, PTAL at the compiler/ changes. 

Thanks.

[commit-bot: I haz the power, 2015-11-03 11:22:26]

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

[commit-bot: I haz the power, 2015-11-03 11:22:26]

Dry run: This issue passed the CQ dry run.

[Benedikt Meurer, 2015-11-03 11:25:38]

LGTM on compiler.

[oth, 2015-11-03 14:02:38]

lgtm for interpreter and tests.

[rmcilroy, 2015-11-03 14:32:44]

The CQ bit was checked by rmcilroy@chromium.org

[commit-bot: I haz the power, 2015-11-03 14:32:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1422443006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1422443006/1

[commit-bot: I haz the power, 2015-11-03 14:35:06]

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

[commit-bot: I haz the power, 2015-11-03 14:35:07]

Try jobs failed on following builders:
  v8_presubmit on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_presubmit/builds/7351)

[rmcilroy, 2015-11-03 16:44:18]

The CQ bit was checked by rmcilroy@chromium.org

[rmcilroy, 2015-11-03 16:44:18]

The patchset sent to the CQ was uploaded after l-g-t-m from
bmeurer@chromium.org, oth@chromium.org
Link to the patchset: https://codereview.chromium.org/1422443006/#ps20001
(title: "Rebased")

[commit-bot: I haz the power, 2015-11-03 16:44:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1422443006/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1422443006/20001

[commit-bot: I haz the power, 2015-11-03 17:03:32]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-11-03 17:03:45]

Patchset 2 (id:??) landed as
https://crrev.com/6eb5dae5361773597723dca88e95208dac0b93fe
Cr-Commit-Position: refs/heads/master@{#31757}