Reenable map collection.

Reenable map collection.

Fix bug in in-object property slack tracking that was causing poor RayTrace performance: initial maps should be reattached to SharedFunctionInfo object at the end of GC even if map collection is not enabled.

Fix presubmit error in objects.cc


R=lrn@chromium.org
BUG=
TEST=

Committed: http://code.google.com/p/v8/source/detail?r=8662

[Lasse Reichstein, 2011-07-15 07:00:14]

LGTM

http://codereview.chromium.org/7381003/diff/1/src/mark-compact.cc
File src/mark-compact.cc (right):

http://codereview.chromium.org/7381003/diff/1/src/mark-compact.cc#newcode409
src/mark-compact.cc:409: // This will allow map transition tree to die from both
root and leaves.
"a map transition tree" or "map transition trees"?

http://codereview.chromium.org/7381003/diff/1/src/mark-compact.h
File src/mark-compact.h (right):

http://codereview.chromium.org/7381003/diff/1/src/mark-compact.h#newcode622
src/mark-compact.h:622: void ReattachInitialMaps();
Make a comment saying what the function does, and possibly when it's called.