Fix stack overflow in cctest/test-api/Threadin2 after r3613.

test/cctest/test-api.cc

 // Copyright 2007-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1133 matching lines @@
 THREADED_TEST(UndefinedIsNotEnumerable) {
   v8::HandleScope scope;
   LocalContext env;
   v8::Handle<Value> result = Script::Compile(v8_str(
       "this.propertyIsEnumerable(undefined)"))->Run();
   CHECK(result->IsFalse());
 }
 
 
 v8::Handle<Script> call_recursively_script;
-static const int kTargetRecursionDepth = 300;  // near maximum
+static const int kTargetRecursionDepth = 200;  // near maximum
 
 
 static v8::Handle<Value> CallScriptRecursivelyCall(const v8::Arguments& args) {
   ApiTestFuzzer::Fuzz();
   int depth = args.This()->Get(v8_str("depth"))->Int32Value();
   if (depth == kTargetRecursionDepth) return v8::Undefined();
   args.This()->Set(v8_str("depth"), v8::Integer::New(depth + 1));
   return call_recursively_script->Run();
 }
 
@@ skipping 7547 matching lines @@
     CompileRun(source_exception);
     other_context->Exit();
     v8::internal::Heap::CollectAllGarbage(false);
     if (GetGlobalObjectsCount() == 1) break;
   }
   CHECK_GE(2, gc_count);
   CHECK_EQ(1, GetGlobalObjectsCount());
 
   other_context.Dispose();
 }