Correctly materialize arguments object in Runtime_DebugEvaluate.

test/mjsunit/regress/regress-crbug-222893.js

Index: test/mjsunit/regress/regress-crbug-222893.js
diff --git a/test/mjsunit/regress/regress-147497.js b/test/mjsunit/regress/regress-crbug-222893.js
similarity index 77%
copy from test/mjsunit/regress/regress-147497.js
copy to test/mjsunit/regress/regress-crbug-222893.js
index 92e29d12589984b0cf34a91d7cac3479a04bfbaa..714c033df6a9057d39dedde98bd4a901ec683bdb 100644
--- a/test/mjsunit/regress/regress-147497.js
+++ b/test/mjsunit/regress/regress-crbug-222893.js
@@ -27,19 +27,33 @@
 
 // Flags: --expose-debug-as debug
 
-Debug = debug.Debug;
+Debug = debug.Debug
+
+var error = null;
+var array = ["a", "b", "c"];
 
 function listener(event, exec_state, event_data, data) {
-  if (event == Debug.DebugEvent.Break) {
-    exec_state.prepareStep(Debug.StepAction.StepNext, 10);
+  try {
+    if (event == Debug.DebugEvent.Break) {
+      assertArrayEquals(array,
+                        exec_state.frame(0).evaluate('arguments').value());
+    }
+  } catch (e) {
+    error = e;
   }
 };
 
 Debug.setListener(listener);
 
-var statement = "";
-for (var i = 0; i < 1024; i++) statement += "z";
-statement = 'with(0)' + statement + '=function foo(){}';
 
-debugger;
-eval(statement);
+(function(a, b) {
+  arguments;
+  debugger;  // Arguments is already materialized.
+}).apply(this, array);
+assertNull(error);
+
+(function(a, b) {
+  debugger;  // Arguments is not yet materialized.
+}).apply(this, array);
+assertNull(error);
+