Remove redundant usages of some macros and functions in debug.cc

Remove redundant usages of some macros and functions in debug.cc

Cleanup of HEAP and FACTORY macros and use isolate_ member of classes where it is possible.
Cleanup of debugger(), debug() and global_handles() functions.
Pass the isolate pointer to the HandleScope constructor.

BUG=none
TEST=none

Committed: http://code.google.com/p/v8/source/detail?r=7416

[Mads Ager (chromium), 2011-03-29 13:57:16]

LGTM, I will fix this comment and land.

http://codereview.chromium.org/6708108/diff/1/src/debug.cc
File src/debug.cc (right):

http://codereview.chromium.org/6708108/diff/1/src/debug.cc#newcode1038
src/debug.cc:1038: Factory* factory = Isolate::Current()->factory();
Use isolate_ here as well.