[debugger] add test case for debug-evaluate for values in TDZ.

R=jkummerow@chromium.org
BUG=chromium:605581
LOG=N

Review URL: https://codereview.chromium.org/1920953003

Cr-Commit-Position: refs/heads/master@{#35794}

test/mjsunit/regress/regress-crbug-605581.js

+// Copyright 2016 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: --expose-debug-as debug
+
+var Debug = debug.Debug;
+var exception = null;
+
+function listener(event, exec_state, event_data, data) {
+  if (event != Debug.DebugEvent.Break) return;
+  try {
+    assertThrows(() => exec_state.frame(0).evaluate("bar.baz"), ReferenceError);
+  } catch (e) {
+    exception = e;
+  }
+}
+
+Debug.setListener(listener);
+
+(function() {
+  debugger;    // bar is still in TDZ at this point.
+  let bar = 1;
+  (x => bar);  // force bar to be context-allocated.
+})();
+
+Debug.setListener(null);
+assertNull(exception);