[DevTools] Improved console.copy command to handle JSON.stringifyable objects.

LayoutTests/inspector/console/console-command-copy.html

Index: LayoutTests/inspector/console/console-command-copy.html
diff --git a/LayoutTests/inspector/console/console-command-copy.html b/LayoutTests/inspector/console/console-command-copy.html
index 6e21c2a9e3ef883914355d7d82ef964939f6c97d..b4e785878bbb247264f53a38e35c20f9a159f2bf 100644
--- a/LayoutTests/inspector/console/console-command-copy.html
+++ b/LayoutTests/inspector/console/console-command-copy.html
@@ -6,12 +6,20 @@
 
 function test()
 {
-    InspectorTest.evaluateInConsole("copy('qwerty')");
+    var pendingCount = 5;
     InspectorFrontendHost.copyText = copyText;
-
+    
+    InspectorTest.evaluateInConsole("copy('qwerty')");
+    InspectorTest.evaluateInConsole("copy(document.querySelector('p'))");
+    InspectorTest.evaluateInConsole("copy({foo:'bar'})");
+    // Check cyclic references in objects
+    InspectorTest.evaluateInConsole("var a = {}; a.b = a; copy(a)");
+    InspectorTest.evaluateInConsole("copy(document.all)");
+    
     function copyText(text) {
         InspectorTest.addResult("InspectorFrontendHost.copyText: " + text);
-        InspectorTest.completeTest();
+        if (--pendingCount === 0)
+            InspectorTest.completeTest();
     }
 }