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

LayoutTests/dart/inspector/scope-variables-expected.txt

+Example div
 Debugger was enabled.
 
 Running: testScopeChain
 Script execution paused.
 Call stack:
     0) handleMessage2 (scope-variables.dart:22)
     1) handleMessage (scope-variables.dart:10)
 
 Dump scope sections:
 Local
     _s: "foo"
     a1: A
     a2: null
     b: false
     d: 1.618
     event: MessageEvent
     i: 42
-    l: Array[3]
+    l: List[3]
     this: undefined
-ObjectGlobal
-    A: A [Dart Class]
-    core: Object
+[Dart Library]Global
+    A: A
+    core: [Dart Library]
+    exampleDivGetter: div#example_div
+    globalArrayVariable: List[6]
+    globalMapVariable: LinkedHashMap
     globalVariable: "globalString"
-    handleMessage: function invoke()
-    handleMessage2: function invoke()
-    html: Object
-    main: function invoke()
-    throwingGetter: "<Exception thrown>"
+    handleMessage: [Dart Function]
+    handleMessage2: [Dart Function]
+    html: [Dart Library]
+    main: [Dart Function]
+    throwingGetter: [Exception: Unhandled exception:
+only the best reviews
+#0      throwingGetter (file:///usr/local/google/home/jacobr/src/dartium6/src/third_party/WebKit/LayoutTests/dart/inspector/scope-variables.dart:42:3)]

[vsm, 2013/07/15 18:40:29]

Note: stack trace has 'jacobr' in here.

[Jacob, 2013/07/15 22:23:54]

Added logic to scope-variables.html to strip source locations.
It looks like the layout-test code doesn't provide generic wild card support and
that instead each test that needs to strip paths does their own normalization in
the test file instead of the expectation file.

 Inspected value toString(): [Instance of A, d = 3.14]
 Script execution resumed.
 Debugger was disabled.