Recommit coderanges putting code objects within a 2 GB range, reserving only ...

Recommit coderanges putting code objects within a 2 GB range, reserving only a 256 MB range of virtual memory for the code range.

Committed: http://code.google.com/p/v8/source/detail?r=3018

[William Hesse, 2009-10-03 14:11:08]

This does not break the 64-bit Linux Chromium build.  It runs with more than 25
tabs, with 2GB of unshared virtual memory reserved for each.  The debug chromium
build with debuggers attached to each renderer cannot run more than about 5
tabs, and that gave a false indication that something was broken.

This now only reserves 256 MB of address space for code objects.

[Mads Ager (chromium), 2009-10-05 12:33:57]

Still LGTM