[debugger] expose side-effect free evaluate to inspector.

src/inspector/java-script-call-frame.cc

 /*
  * Copyright (c) 2010, Google Inc. 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
@@ skipping 80 matching lines @@
           .ToLocalChecked());
   v8::TryCatch try_catch(m_isolate);
   v8::Local<v8::Value> details;
   if (func->Call(context, callFrame, 0, nullptr).ToLocal(&details)) {
     return v8::Local<v8::Object>::Cast(details);
   }
   return v8::MaybeLocal<v8::Object>();
 }
 
 v8::MaybeLocal<v8::Value> JavaScriptCallFrame::evaluate(
-    v8::Local<v8::Value> expression) {
+    v8::Local<v8::Value> expression, bool throwOnSideEffect) {
   v8::MicrotasksScope microtasks(m_isolate,
                                  v8::MicrotasksScope::kRunMicrotasks);
   v8::Local<v8::Context> context =
       v8::Local<v8::Context>::New(m_isolate, m_debuggerContext);
   v8::Local<v8::Object> callFrame =
       v8::Local<v8::Object>::New(m_isolate, m_callFrame);
   v8::Local<v8::Function> evalFunction = v8::Local<v8::Function>::Cast(
       callFrame->Get(context, toV8StringInternalized(m_isolate, "evaluate"))
           .ToLocalChecked());
-  return evalFunction->Call(context, callFrame, 1, &expression);
+  v8::Local<v8::Value> argv[] = {
+      expression, v8::Boolean::New(m_isolate, throwOnSideEffect)};
+  return evalFunction->Call(context, callFrame, arraysize(argv), argv);
 }
 
 v8::MaybeLocal<v8::Value> JavaScriptCallFrame::restart() {
   v8::MicrotasksScope microtasks(m_isolate,
                                  v8::MicrotasksScope::kDoNotRunMicrotasks);
   v8::Local<v8::Context> context =
       v8::Local<v8::Context>::New(m_isolate, m_debuggerContext);
   v8::Local<v8::Object> callFrame =
       v8::Local<v8::Object>::New(m_isolate, m_callFrame);
   v8::Local<v8::Function> restartFunction = v8::Local<v8::Function>::Cast(
@@ skipping 24 matching lines @@
               .ToLocalChecked());
   v8::Local<v8::Value> argv[] = {
       v8::Local<v8::Value>(v8::Integer::New(m_isolate, scopeNumber)),
       variableName, newValue};
   v8::TryCatch try_catch(m_isolate);
   return setVariableValueFunction->Call(context, callFrame, arraysize(argv),
                                         argv);
 }
 
 }  // namespace v8_inspector