Improve Dart Debugger performance and robustness by creating Dart wrappers using the standard SetNa…

LayoutTests/dart/inspector/evaluate-in-console-expected.txt

 CONSOLE MESSAGE: line 1: foo
 Debugger was enabled.
 
 Running: testScopeChain
 Script execution paused.
 Call stack:
     0) handleMessage (evaluate-in-console.dart:12)
 test.instanceField = "Test.instanceField"
 test.instanceField = "new value" = "new value"
 test.foo = null
 test.foo = 3 = 3
 test.foo = 3
 test.toString() = "<Test instance with instanceField = new value>"
-test.toString(1) = "NoSuchMethodException: incorrect number of arguments passed to function named 'toString'"
+test.toString(1) = "Unhandled exception:
+Closure call with mismatched arguments: function 'call'
+
+NoSuchMethodError: incorrect number of arguments passed to method named 'call'
+Receiver: Closure: () => String from Function 'toString':.
+Tried calling: call(1)
+Found: call()
+#0      Object.noSuchMethod (SOURCE_LOCATION)"
 test.create("x").instanceField = "x"
 test.concat(test.create("x"), test.create("y")) = "new value:x:y"
 _private = "private"
 globalField = null
 calculateSquareRoot(25) = 5
-document.$dom_createElement("div").tagName = "DIV"
+new Element.tag("div").outerHtml = "<div></div>"
+new Element.tag("div").tagName = "DIV"
 
 Running: testPrint
 Script execution resumed.
 Debugger was disabled.