add "always allow" option to the mediastream infobar and allow user to allow/not allow acces to devi

chrome/browser/resources/options2/content_settings_exceptions_area.js

 // Copyright (c) 2012 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.
 
 cr.define('options.contentSettings', function() {
   /** @const */ var InlineEditableItemList = options.InlineEditableItemList;
   /** @const */ var InlineEditableItem = options.InlineEditableItem;
   /** @const */ var ArrayDataModel = cr.ui.ArrayDataModel;
 
   /**
@@ skipping 93 matching lines @@
       // This one tracks the actual validity of the pattern in the input. This
       // starts off as true so as not to annoy the user when he adds a new and
       // empty input.
       this.inputIsValid = true;
 
       this.input = input;
       this.select = select;
 
       this.updateEditables();
 
-      // Editing notifications and geolocation is disabled for now.
+      // Editing notifications, geolocation and mediastream is disabled for now.
       if (this.contentType == 'notifications' ||
-          this.contentType == 'location') {
+          this.contentType == 'location' ||
+          this.contentType == 'mediastream') {
         this.editable = false;
       }
 
       // If the source of the content setting exception is not the user
       // preference, then the content settings exception is managed and the user
       // can't edit it.
       if (this.dataItem.source &&
           this.dataItem.source != 'preference') {
         this.setAttribute('managedby', this.dataItem.source);
         this.deletable = false;
@@ skipping 307 matching lines @@
         // changed since we sent the request to analyze it).
         if (pattern == listItem.input.value)
           listItem.setPatternValid(valid);
       }
     },
 
     /**
      * Returns whether the rows are editable in this list.
      */
     isEditable: function() {
-      // Editing notifications and geolocation is disabled for now.
+      // Editing notifications, geolocation and mediastream is disabled for now.
       return !(this.contentType == 'notifications' ||
                this.contentType == 'location' ||
-               this.contentType == 'fullscreen');
+               this.contentType == 'fullscreen' ||
+               this.contentType == 'mediastream');
     },
 
     /**
      * Removes all exceptions from the js model.
      */
     reset: function() {
       if (this.isEditable()) {
         // The null creates the Add New Exception row.
         this.dataModel = new ArrayDataModel([null]);
       } else {
@@ skipping 101 matching lines @@
     }
   };
 
   return {
     ExceptionsListItem: ExceptionsListItem,
     ExceptionsAddRowListItem: ExceptionsAddRowListItem,
     ExceptionsList: ExceptionsList,
     ContentSettingsExceptionsArea: ContentSettingsExceptionsArea,
   };
 });