DevTools: Make VM script names less noisy.

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

 var initialize_ConsoleTest = function() {
 
 InspectorTest.showConsolePanel = function()
 {
     WebInspector.showPanel("console");
     WebInspector.drawer.immediatelyFinishAnimation();
 }
 
 InspectorTest.prepareConsoleMessageText = function(messageElement)
 {
     var messageText = messageElement.textContent.replace(/\u200b/g, "");
     // Replace scriptIds with generic scriptId string to avoid flakiness.
-    messageText = messageText.replace(/\[VM\]\s+\(\d+\)/g, "[VM] (scriptId)");
+    messageText = messageText.replace(/VM\d+/g, "VM");
     // Strip out InjectedScript from stack traces to avoid rebaselining each time InjectedScriptSource is edited.
-    messageText = messageText.replace(/InjectedScript[\.a-zA-Z_]+ \[VM\] \(scriptId\):\d+/g, "");
+    messageText = messageText.replace(/InjectedScript[\.a-zA-Z_]+ VM:\d+/g, "");
     // The message might be extremely long in case of dumping stack overflow message.
     messageText = messageText.substring(0, 1024);
     return messageText;
 }
 
 InspectorTest.dumpConsoleMessages = function(printOriginatingCommand, dumpClassNames)
 {
     var result = [];
     var visibleMessagesIndices = WebInspector.consoleView._visibleMessagesIndices;
     for (var i = 0; i < visibleMessagesIndices.length; ++i) {
@@ skipping 77 matching lines @@
         }
     }
 }
 
 InspectorTest.waitUntilMessageReceived = function(callback)
 {
     InspectorTest.addSniffer(WebInspector.console, "addMessage", callback, false);
 }
 
 }