Debugger: correctly find closure to recompile eval for debugging.

test/mjsunit/regress/regress-crbug-517592.js

+// Copyright 2015 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 --min-preparse-length=10
+
+var source =
+  "var foo = function foo() {\n" +
+  "  return 1;\n" +
+  "}\n" +
+  "//@ sourceURL=test";
+
+Debug = debug.Debug;
+Debug.setListener(listener);
+var exception = null;
+var break_count = 0;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.Break) break_count++;
+  if (event != Debug.DebugEvent.AfterCompile) return;
+  try {
+    var name = event_data.script().name();
+    var id = event_data.script().id();
+    assertEquals("test", name);
+    Debug.setScriptBreakPointById(id, 2);
+  } catch (e) {
+    exception = e;
+  }
+}
+
+eval(source);
+
+assertEquals(0, break_count);
+foo();
+assertEquals(1, break_count);
+assertNull(exception);