Simplify isolates access during stack iteration (WAS: Move SafeStackFrameIterator::active_count_...)

test/cctest/test-accessors.cc

 // Copyright 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 379 matching lines @@
       "}"))->Run();
 }
 
 
 static v8::Handle<Value> StackCheck(Local<String> name,
                                     const AccessorInfo& info) {
   i::StackFrameIterator iter;
   for (int i = 0; !iter.done(); i++) {
     i::StackFrame* frame = iter.frame();
     CHECK(i != 0 || (frame->type() == i::StackFrame::EXIT));
-    i::Code* code = frame->LookupCode(i::Isolate::Current());
+    i::Code* code = frame->LookupCode();
     CHECK(code->IsCode());
     i::Address pc = frame->pc();
     CHECK(code->contains(pc));
     iter.Advance();
   }
   return v8::Undefined();
 }
 
 
 THREADED_TEST(StackIteration) {
@@ skipping 30 matching lines @@
   obj->SetAccessor(v8_str("xxx"), AllocateHandles);
   LocalContext env;
   env->Global()->Set(v8_str("obj"), obj->NewInstance());
   v8::Handle<v8::Value> result = Script::Compile(String::New(
       "var result;"
       "for (var i = 0; i < 4; i++)"
       "  result = obj.xxx;"
       "result;"))->Run();
   CHECK_EQ(100, result->Int32Value());
 }