DevTools: prefix node.js scripts's sourceURL with "file://" to make them a valid url

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

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 456 matching lines @@
      * @param {string=} sourceMapURL
      * @param {boolean=} hasSourceURL
      * @param {boolean=} hasSyntaxError
      * @return {!WebInspector.Script}
      */
     _parsedScriptSource: function(scriptId, sourceURL, startLine, startColumn, endLine, endColumn, executionContextId, hash, executionContextAuxData, isLiveEdit, sourceMapURL, hasSourceURL, hasSyntaxError)
     {
         var isContentScript = false;
         if (executionContextAuxData && ("isDefault" in executionContextAuxData))
             isContentScript = !executionContextAuxData["isDefault"];
+        // Support file URL for node.js.
+        if (Runtime.queryParam("v8only") && sourceURL && sourceURL.startsWith("/"))

[pfeldman, 2016/10/15 00:42:35]

- In case when Node target is attached from within regular DevTools, this does
not work.
- In case Windows decides to use C:\Documents and Settings\ that also does not
work (it does not start with "/")

So you need to check whether you are talking to Node target. We need target
metainfo available here :(

[lushnikov, 2016/10/15 00:59:03]

Handled (1) via the Target.isNodeJS()

We're in a poor position to address (2) - looks like it should be
handled on the node.js side

+            sourceURL = "file://" + sourceURL;
         var script = new WebInspector.Script(this, scriptId, sourceURL, startLine, startColumn, endLine, endColumn, executionContextId, hash, isContentScript, isLiveEdit, sourceMapURL, hasSourceURL);
         this._registerScript(script);
         if (!hasSyntaxError)
             this.dispatchEventToListeners(WebInspector.DebuggerModel.Events.ParsedScriptSource, script);
         else
             this.dispatchEventToListeners(WebInspector.DebuggerModel.Events.FailedToParseScriptSource, script);
         return script;
     },
 
     /**
@@ skipping 783 matching lines @@
 /**
  * @param {?WebInspector.Target} target
  * @return {?WebInspector.DebuggerModel}
  */
 WebInspector.DebuggerModel.fromTarget = function(target)
 {
     if (!target || !target.hasJSCapability())
         return null;
     return /** @type {?WebInspector.DebuggerModel} */ (target.model(WebInspector.DebuggerModel));
 }