Patch for allowing several V8 instances in process:...

src/rewriter.cc

Index: src/rewriter.cc
===================================================================
--- src/rewriter.cc	(revision 3427)
+++ src/rewriter.cc	(working copy)
@@ -820,7 +820,7 @@
 
 
 bool Rewriter::Process(FunctionLiteral* function) {
-  HistogramTimerScope timer(&Counters::rewriting);
+  HistogramTimerScope timer(&COUNTER(rewriting));
   Scope* scope = function->scope();
   if (scope->is_function_scope()) return true;
 
@@ -841,7 +841,7 @@
   ZoneList<Statement*>* body = function->body();
 
   if (FLAG_optimize_ast && !body->is_empty()) {
-    HistogramTimerScope timer(&Counters::ast_optimization);
+    HistogramTimerScope timer(&COUNTER(ast_optimization));
     AstOptimizer optimizer(function->name());
     optimizer.Optimize(body);
     if (optimizer.HasStackOverflow()) {