Fix lo_space initialization for external snapshot

Fix lo_space initialization for external snapshot

R=rmcilroy@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=24998

[baixo1, 2014-10-29 18:25:52]

baixo@google.com changed reviewers:
+ baixo@google.com, rmcilroy@chromium.org

[baixo1, 2014-10-29 18:25:52]

Please take a look.

[rmcilroy, 2014-10-29 23:25:26]

rmcilroy@chromium.org changed reviewers:
+ vogelheim@chromium.org, yangguo@chromium.org
- baixo@google.com

[rmcilroy, 2014-10-29 23:25:27]

lgtm, thanks.

+vogelheim / yangguo - could we add some external snapshot tests to ensure that
changes to the snapshot code don't break the external snapshot in the future now
that we will be using it in Chrome?

[rmcilroy, 2014-10-29 23:27:15]

Committed patchset #1 (id:1) manually as 24998 (presubmit successful).

[Yang, 2014-10-30 06:09:30]

On 2014/10/29 23:27:15, rmcilroy wrote:
> Committed patchset #1 (id:1) manually as 24998 (presubmit successful).

Yup. It sounds like we need more test coverage for external snapshots. Daniel,
do you want to do this?