Revert three commits due to cpu-profiler failures

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index b45cf2543a4cb09c7d813514b49c6344b3608142..fc0cef022bbc34352702370420982499ded9cd93 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -7656,13 +7656,20 @@ bool Isolate::GetHeapCodeAndMetadataStatistics(
 
 void Isolate::GetStackSample(const RegisterState& state, void** frames,
                              size_t frames_limit, SampleInfo* sample_info) {
-  if (TickSample::GetStackSample(this, state, TickSample::kSkipCEntryFrame,
-                                 frames, frames_limit, sample_info)) {
+#if defined(USE_SIMULATOR)
+  RegisterState regs;
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
+  if (!i::SimulatorHelper::FillRegisters(isolate, &regs)) {
+    sample_info->frames_count = 0;
+    sample_info->vm_state = OTHER;
+    sample_info->external_callback_entry = nullptr;
     return;
   }
-  sample_info->frames_count = 0;
-  sample_info->vm_state = OTHER;
-  sample_info->external_callback_entry = nullptr;
+#else
+  const RegisterState& regs = state;
+#endif
+  TickSample::GetStackSample(this, regs, TickSample::kSkipCEntryFrame, frames,
+                             frames_limit, sample_info);
 }
 
 size_t Isolate::NumberOfPhantomHandleResetsSinceLastCall() {