Support idle time in CPU profiler

test/cctest/test-log-stack-tracer.cc

 // Copyright 2011 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 139 matching lines @@
 }
 
 
 void TraceExtension::JSTrace(const v8::FunctionCallbackInfo<v8::Value>& args) {
   DoTraceHideCEntryFPAddress(GetFP(args));
 }
 
 
 static Address GetJsEntrySp() {
   CHECK_NE(NULL, i::Isolate::Current()->thread_local_top());
-  return Isolate::js_entry_sp(i::Isolate::Current()->thread_local_top());
+  return i::Isolate::Current()->js_entry_sp();
 }
 
 
 void TraceExtension::JSEntrySP(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   CHECK_NE(0, GetJsEntrySp());
 }
 
 
 void TraceExtension::JSEntrySPLevel2(
@@ skipping 218 matching lines @@
   CcTest::InitializeVM(TRACE_EXTENSION);
   v8::HandleScope scope(CcTest::isolate());
   CHECK_EQ(0, GetJsEntrySp());
   CompileRun("a = 1; b = a + 1;");
   CHECK_EQ(0, GetJsEntrySp());
   CompileRun("js_entry_sp();");
   CHECK_EQ(0, GetJsEntrySp());
   CompileRun("js_entry_sp_level2();");
   CHECK_EQ(0, GetJsEntrySp());
 }