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

test/debugger/debug/debug-evaluate-no-side-effect-builtins.js

 // Copyright 2017 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --ignition --side-effect-free-debug-evaluate
+// Flags: --ignition
 
 Debug = debug.Debug
 
 var exception = null;
 
 function listener(event, exec_state, event_data, data) {
   if (event != Debug.DebugEvent.Break) return;
   try {
     function success(expectation, source) {
-      assertEquals(expectation, exec_state.frame(0).evaluate(source).value());
+      assertEquals(expectation,
+                   exec_state.frame(0).evaluate(source, true).value());
     }
     function fail(source) {
-      assertThrows(() => exec_state.frame(0).evaluate(source), EvalError);
+      assertThrows(() => exec_state.frame(0).evaluate(source, true),
+                   EvalError);
     }
 
     // Test Math functions.
     for (f of Object.getOwnPropertyNames(Math)) {
       if (typeof Math[f] === "function") {
         var result = exec_state.frame(0).evaluate(
                          `Math.${f}(0.5, -0.5);`).value();
         if (f != "random") assertEquals(Math[f](0.5, -0.5), result);
       }
     }
@@ skipping 51 matching lines @@
 // Add the debug event listener.
 Debug.setListener(listener);
 
 function f() {
   debugger;
 };
 
 f();
 
 assertNull(exception);