Add some interfaces to the GC that allow us to reserve space. This is needed...

src/frames.cc

Index: src/frames.cc
===================================================================
--- src/frames.cc	(revision 3575)
+++ src/frames.cc	(working copy)
@@ -306,7 +306,7 @@
 
 
 void StackHandler::Uncook(Code* code) {
-  ASSERT(MarkCompactCollector::IsCompacting());
+  ASSERT(MarkCompactCollector::HasCompacted());
   set_pc(code->instruction_start() + OffsetFrom(pc()));
   ASSERT(code->contains(pc()));
 }
@@ -336,7 +336,7 @@
 void StackFrame::UncookFramesForThread(ThreadLocalTop* thread) {
   // Only uncooking frames when the collector is compacting and thus moving code
   // around.
-  ASSERT(MarkCompactCollector::IsCompacting());
+  ASSERT(MarkCompactCollector::HasCompacted());
   ASSERT(thread->stack_is_cooked());
   for (StackFrameIterator it(thread); !it.done(); it.Advance()) {
     it.frame()->Uncook();