Add isPausedWorker command to Runtime and use it to auto attach DevTools to ServiceWorker.

Source/devtools/front_end/main/Main.js

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.com).
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 117 matching lines @@
             if (error || wasThrown) {
                 console.error(error);
                 return;
             }
             InspectorFrontendHost.inspectedURLChanged(result.value);
         }
     },
 
     _loadCompletedForWorkers: function()
     {
-        // Make sure script execution of dedicated worker is resumed and then paused
-        // on the first script statement in case we autoattached to it.
+        // Make sure script execution of dedicated worker or service worker is
+        // resumed and then paused on the first script statement in case we
+        // autoattached to it.
         if (WebInspector.queryParam("workerPaused")) {
-            DebuggerAgent.pause();
-            RuntimeAgent.run(calculateTitle.bind(this));
-        } else if (!Capabilities.isMainFrontend) {
-            calculateTitle.call(this);
+            pauseAndResume.call(this);
+        } else{
+            RuntimeAgent.isPausedWorker(isPausedWorkerCallback.bind(this));
         }
 
         /**
+         * @this {WebInspector.Main}
+         */
+        function isPausedWorkerCallback(error, result)
+        {
+            if (result) {
+                pauseAndResume.call(this);
+            } else if (!Capabilities.isMainFrontend) {
+                calculateTitle.call(this);
+            }
+        }
+
+        /**
+         * @this {WebInspector.Main}
+         */
+        function pauseAndResume()
+        {
+            DebuggerAgent.pause();
+            RuntimeAgent.run(calculateTitle.bind(this));
+        }
+
+        /**
          * @this {WebInspector.Main}
          */
         function calculateTitle()
         {
             this._calculateWorkerInspectorTitle();
         }
     },
 
     _resetErrorAndWarningCounts: function()
     {
@@ skipping 646 matching lines @@
 
 WebInspector.__defineGetter__("inspectedPageURL", function()
 {
     return WebInspector.resourceTreeModel.inspectedPageURL();
 });
 
 WebInspector.panel = function(name)
 {
     return WebInspector.inspectorView.panel(name);
 }