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

test/debugger/debug/debug-evaluate-no-side-effect.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;
 let a = 1;
 var object = { property : 2,
                get getter() { return 3; }
              };
 var string1 = { toString() { return "x"; } };
 var string2 = { toString() { print("x"); return "x"; } };
 var array = [4, 5];
 var error = new Error();
 
 function set_a() { a = 2; }
 
 function get_a() { return a; }
 
 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);
     }
     // Simple test.
     success(3, "1 + 2");
     // Dymanic load.
     success(array, "array");
     // Context load.
     success(1, "a");
     // Global and named property load.
     success(2, "object.property");
     // Load via read-only getter.
@@ skipping 33 matching lines @@
 Debug.setListener(listener);
 
 function f() {
   debugger;
 };
 
 f();
 
 assertNull(exception);
 assertEquals(1, a);