[Isolates] More handle improvements:

[Isolates] More handle improvements:

 o Automatically extract the current isolate when creating heap object
   handles.

 o Pass isolate to HandleScope.

 o Pass isolate to more runtime functions and prefer Isolate* to
   Heap*.

Committed: http://code.google.com/p/v8/source/detail?r=5546

[yurys, 2010-09-28 13:06:58]

On 2010/09/28 12:41:19, Vitaly wrote:
> 

LGTM