DevTools: Refactor linkifyRawLocation to use fallback url

Source/devtools/front_end/sdk/InspectorBackend.js

Index: Source/devtools/front_end/sdk/InspectorBackend.js
diff --git a/Source/devtools/front_end/sdk/InspectorBackend.js b/Source/devtools/front_end/sdk/InspectorBackend.js
index 65458e4bc0bbdc9f5b6b555c079c3925c06a8d59..6b6cae5221f79111372736c7d8ae8f5599a4e278 100644
--- a/Source/devtools/front_end/sdk/InspectorBackend.js
+++ b/Source/devtools/front_end/sdk/InspectorBackend.js
@@ -583,6 +583,14 @@ InspectorBackendClass.Connection.prototype = {
         setTimeout(InspectorBackendClass.AgentPrototype.prototype.dispatchResponse.bind(this.agent(domain), messageObject, methodName, callback), 0);
     },
 
+    /**
+     * @return {boolean}
+     */
+    isClosed: function()
+    {
+        return !this._isConnected;
+    },
+
     __proto__: WebInspector.Object.prototype
 
 }