DevTools: Add context menu option for objects to save to temp variable.

LayoutTests/http/tests/inspector/console-test.js

 var initialize_ConsoleTest = function() {
 
 
 InspectorTest.showConsolePanel = function()
 {
     WebInspector.inspectorView.showPanel("console");
 }
 
 InspectorTest.prepareConsoleMessageText = function(messageElement)
 {
@@ skipping 138 matching lines @@
             InspectorTest.addResult("FAILED: didn't find _parameters field in the message.");
         }
     }
 }
 
 InspectorTest.waitUntilMessageReceived = function(callback)
 {
     InspectorTest.addSniffer(WebInspector.console, "addMessage", callback, false);
 }
 
+InspectorTest.waitUntilNthMessageReceived = function(count, callback)
+{
+    function override()
+    {
+        if (--count === 0)
+            InspectorTest.safeWrap(callback)();
+        else
+            InspectorTest.addSniffer(WebInspector.console, "addMessage", override, false);
+    }
+    InspectorTest.addSniffer(WebInspector.console, "addMessage", override, false);
 }
+
+}