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

test/mjsunit/ignition/optimized-stack-trace.js

Index: test/mjsunit/ignition/optimized-stack-trace.js
diff --git a/test/mjsunit/ignition/optimized-stack-trace.js b/test/mjsunit/ignition/optimized-stack-trace.js
new file mode 100644
index 0000000000000000000000000000000000000000..77f9acf3c8507bc66c9ef9adbd3217b23a402df9
--- /dev/null
+++ b/test/mjsunit/ignition/optimized-stack-trace.js
@@ -0,0 +1,22 @@
+// 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
+
+// Test that PC in optimized frame would correctly translate into
+// unoptimized frame when collecting stack trace.
+
+function f() {
+  return new Error().stack;
+}
+
+function g(x) {
+  return f();
+}
+
+g();
+g();
+%OptimizeFunctionOnNextCall(g);
+print(g());
+assertTrue(/g \(.*?\.js:15:10\)/.test(g()));