Add inspection of arguments for optimized frames

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

Index: test/mjsunit/debug-evaluate-locals-optimized.js
diff --git a/test/mjsunit/debug-evaluate-locals-optimized.js b/test/mjsunit/debug-evaluate-locals-optimized.js
index 3cf311d6689ac7943c3f1bf51bd2af0b4f741b1b..7a77c0d32a55bf62f2707eed922ba6331dc6254f 100644
--- a/test/mjsunit/debug-evaluate-locals-optimized.js
+++ b/test/mjsunit/debug-evaluate-locals-optimized.js
@@ -41,12 +41,18 @@ 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, frame.localValue(0).value());
           assertEquals(i * 2 + 2, 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, frame.argumentValue(0).value());
+          assertEquals((i + 1) * 2 + 2, frame.argumentValue(1).value());
         }
 
         // Check the frame function.