Use stored Isolate pointer instead of Isolate::Current()

src/cpu-profiler.cc

 // Copyright 2012 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 44 matching lines @@
       enqueue_order_(0) {
 }
 
 
 void ProfilerEventsProcessor::Enqueue(const CodeEventsContainer& event) {
   event.generic.order = ++enqueue_order_;
   events_buffer_.Enqueue(event);
 }
 
 
-void ProfilerEventsProcessor::AddCurrentStack() {
+void ProfilerEventsProcessor::AddCurrentStack(Isolate* isolate) {
   TickSampleEventRecord record(enqueue_order_);
   TickSample* sample = &record.sample;
-  Isolate* isolate = Isolate::Current();
   sample->state = isolate->current_vm_state();
   sample->pc = reinterpret_cast<Address>(sample);  // Not NULL.
   for (StackTraceFrameIterator it(isolate);
        !it.done() && sample->frames_count < TickSample::kMaxFramesCount;
        it.Advance()) {
     sample->stack[sample->frames_count++] = it.frame()->pc();
   }
   ticks_from_vm_buffer_.Enqueue(record);
 }
 
@@ skipping 342 matching lines @@
 
 void CpuProfiler::ResetProfiles() {
   delete profiles_;
   profiles_ = new CpuProfilesCollection();
 }
 
 void CpuProfiler::StartProfiling(const char* title, bool record_samples) {
   if (profiles_->StartProfiling(title, next_profile_uid_++, record_samples)) {
     StartProcessorIfNotStarted();
   }
-  processor_->AddCurrentStack();
+  processor_->AddCurrentStack(isolate_);
 }
 
 
 void CpuProfiler::StartProfiling(String* title, bool record_samples) {
   StartProfiling(profiles_->GetName(title), record_samples);
 }
 
 
 void CpuProfiler::StartProcessorIfNotStarted() {
   if (processor_ == NULL) {
@@ skipping 81 matching lines @@
     ReportBuiltinEventRecord* rec = &evt_rec.ReportBuiltinEventRecord_;
     Builtins::Name id = static_cast<Builtins::Name>(i);
     rec->start = builtins->builtin(id)->address();
     rec->builtin_id = id;
     processor_->Enqueue(evt_rec);
   }
 }
 
 
 } }  // namespace v8::internal