Ensure that relocinfo's host code object is correctly reset on GC in TypeFeedbackOracle::RelocateRe…

Ensure that relocinfo's host code object is correctly reset on GC in TypeFeedbackOracle::RelocateRelocInfos

TBR=ulan@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=19860

[rmcilroy, 2014-03-12 16:48:27]

Ulan: this should fix the tree-closing red bots on the waterfall after my cl
r19856 landed.  If you are happy with this fix then I will land it to get the
bots green again, otherwise I will revert r19856 - let me know which you would
prefer?

[rmcilroy, 2014-03-12 17:17:51]

On 2014/03/12 16:48:27, rmcilroy wrote:
> Ulan: this should fix the tree-closing red bots on the waterfall after my cl
> r19856 landed.  If you are happy with this fix then I will land it to get the
> bots green again, otherwise I will revert r19856 - let me know which you would
> prefer?

I'm going to TBR this to try and get the tree green just now - if you have any
comments I will address them in a different CL.

[rmcilroy, 2014-03-12 17:18:57]

Committed patchset #1 manually as r19860 (tree was closed).

[ulan, 2014-03-13 08:42:24]

lgtm, thanks for fixing it!