Fix the stack limits setting API so it is usable.

src/compiler.cc

Index: src/compiler.cc
===================================================================
--- src/compiler.cc	(revision 2982)
+++ src/compiler.cc	(working copy)
@@ -121,8 +121,6 @@
                                        ScriptDataImpl* pre_data) {
   CompilationZoneScope zone_scope(DELETE_ON_EXIT);
 
-  // Make sure we have an initial stack limit.
-  StackGuard guard;
   PostponeInterruptsScope postpone;
 
   ASSERT(!i::Top::global_context().is_null());
@@ -351,8 +349,6 @@
   // The VM is in the COMPILER state until exiting this function.
   VMState state(COMPILER);
 
-  // Make sure we have an initial stack limit.
-  StackGuard guard;
   PostponeInterruptsScope postpone;
 
   // Compute name, source code and script data.