[DevTools] Move main target/connection to TargetManager.

third_party/WebKit/Source/devtools/front_end/sdk/SubTargetsManager.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @constructor
  * @extends {WebInspector.SDKModel}
  * @param {!WebInspector.Target} target
  */
 WebInspector.SubTargetsManager = function(target)
@@ skipping 334 matching lines @@
 
 /**
  * @constructor
  * @param {!TargetAgent.TargetInfo} payload
  */
 WebInspector.TargetInfo = function(payload)
 {
     this.id = payload.targetId;
     this.url = payload.url;
     this.type = payload.type;
-    if (this.type !== "page" && this.type !== "iframe") {
+    this.canActivate = this.type === "page" || this.type === "iframe";
+    if (this.type === "node")
+        this.title = WebInspector.UIString("Node: %s", this.url);
+    else if (this.type === "page" || this.type === "iframe")
+        this.title = payload.title;
+    else
         this.title = WebInspector.UIString("Worker: %s", this.url);
-        this.canActivate = false;
-    } else {
-        this.title = payload.title;
-        this.canActivate = true;
-    }
 };