Add inspection of arguments for optimized frames

test/mjsunit/debug-evaluate-locals-optimized-double.js

Index: test/mjsunit/debug-evaluate-locals-optimized-double.js
diff --git a/test/mjsunit/debug-evaluate-locals-optimized-double.js b/test/mjsunit/debug-evaluate-locals-optimized-double.js
index 781e3ac821e13a6e617a293485bc89a770af009e..bbe78d62360abdf83258b25bb53f9e28d6f981ac 100644
--- a/test/mjsunit/debug-evaluate-locals-optimized-double.js
+++ b/test/mjsunit/debug-evaluate-locals-optimized-double.js
@@ -41,14 +41,22 @@ function listener(event, exec_state, event_data, data) {
 
       for (var i = 0; i < exec_state.frameCount(); i++) {
         var frame = exec_state.frame(i);
-        // All frames except the bottom one has normal variables a and b.
         if (i < exec_state.frameCount() - 1) {
+        // All frames except the bottom one has normal variables a and b.
           assertEquals('a', frame.localName(0));
           assertEquals('b', frame.localName(1));
           assertEquals(i * 2 + 1 + (i * 2 + 1) / 100,
                        frame.localValue(0).value());
           assertEquals(i * 2 + 2 + (i * 2 + 2) / 100,
                        frame.localValue(1).value());
+
+          // All frames except the bottom one has arguments variables x and y.
+          assertEquals('x', frame.argumentName(0));
+          assertEquals('y', frame.argumentName(1));
+          assertEquals((i + 1) * 2 + 1 + ((i + 1) * 2 + 1) / 100,
+                       frame.argumentValue(0).value());
+          assertEquals((i + 1) * 2 + 2 + ((i + 1) * 2 + 2) / 100,
+                       frame.argumentValue(1).value());
         }
 
         // Check the frame function.