[DevTools] Shows Manifest file in Sources tab

third_party/WebKit/Source/devtools/front_end/bindings/NetworkProject.js

 /*
  * Copyright (C) 2012 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 324 matching lines @@
 
     /**
      * @param {!WebInspector.Resource} resource
      */
     _addResource: function(resource)
     {
         var resourceType = resource.resourceType();
         // Only load selected resource types from resources.
         if (resourceType !== WebInspector.resourceTypes.Image &&
             resourceType !== WebInspector.resourceTypes.Font &&
-            resourceType !== WebInspector.resourceTypes.Document) {
+            resourceType !== WebInspector.resourceTypes.Document &&
+            resourceType !== WebInspector.resourceTypes.Manifest) {
             return;
         }
 
         // Ignore non-images and non-fonts.
         if (resourceType === WebInspector.resourceTypes.Image && resource.mimeType && !resource.mimeType.startsWith("image"))
             return;
         if (resourceType === WebInspector.resourceTypes.Font && resource.mimeType && !resource.mimeType.includes("font"))
             return;
         if ((resourceType === WebInspector.resourceTypes.Image || resourceType === WebInspector.resourceTypes.Font) && resource.contentURL().startsWith("data:"))
             return;
@@ skipping 68 matching lines @@
 
     _reset: function()
     {
         for (var project of this._workspaceProjects.values())
             project.reset();
         this._workspaceProjects.clear();
     },
 
     __proto__: WebInspector.SDKObject.prototype
 }