[interpreter] Add tests for translating PC from optimized frame.

test/mjsunit/ignition/optimized-debug-frame.js

Index: test/mjsunit/ignition/optimized-debug-frame.js
diff --git a/test/mjsunit/ignition/optimized-debug-frame.js b/test/mjsunit/ignition/optimized-debug-frame.js
new file mode 100644
index 0000000000000000000000000000000000000000..be316ad6f49280d5f931f38c5d28319cc702725b
--- /dev/null
+++ b/test/mjsunit/ignition/optimized-debug-frame.js
@@ -0,0 +1,38 @@
+// 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: --allow-natives-syntax --expose-debug-as debug
+
+// Test that PC in optimized frame would correctly translate into
+// unoptimized frame when retrieving frame information in the debugger.
+
+function f() {
+  debugger;
+}
+
+function g(x) {
+  return f();
+}
+
+var break_count = 0;
+
+function listener(event, exec_state, event_data, data) {
+  if (event != Debug.DebugEvent.Break) return;
+  assertEquals(14, exec_state.frame(1).sourceLine());
+  assertEquals(9, exec_state.frame(1).sourceColumn());
+  break_count++;
+}
+
+g();
+g();
+%OptimizeFunctionOnNextCall(g);
+
+var Debug = debug.Debug;
+Debug.setListener(listener);
+
+g();
+
+Debug.setListener(null);
+
+assertEquals(1, break_count);