Move SimulatorHelper into V8 out of profiler clients.

test/cctest/trace-extension.cc

 // Copyright 2014 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 85 matching lines @@
   trace_env.sample = sample;
 }
 
 
 void TraceExtension::DoTrace(Address fp) {
   RegisterState regs;
   regs.fp = fp;
   // sp is only used to define stack high bound
   regs.sp =
       reinterpret_cast<Address>(trace_env.sample) - 10240;
-  trace_env.sample->Init(CcTest::isolate(), regs,
+  RegisterState updated_regs;
+  trace_env.sample->Init(CcTest::isolate(), regs, updated_regs,
                          v8::TickSample::kSkipCEntryFrame, true);
 }
 
 
 void TraceExtension::Trace(const v8::FunctionCallbackInfo<v8::Value>& args) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate());
   i::VMState<EXTERNAL> state(isolate);
   Address address = reinterpret_cast<Address>(
       reinterpret_cast<intptr_t>(&TraceExtension::Trace));
   i::ExternalCallbackScope call_scope(isolate, address);
@@ skipping 40 matching lines @@
   v8::HandleScope scope(args.GetIsolate());
   const Address js_entry_sp = GetJsEntrySp();
   CHECK(js_entry_sp);
   CompileRun("js_entry_sp();");
   CHECK_EQ(js_entry_sp, GetJsEntrySp());
 }
 
 
 }  // namespace internal
 }  // namespace v8