Devtools: get rid of ProjectWillReset event, introduce ProjectRemoved instead of it

Source/devtools/front_end/sdk/SnippetStorage.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 110 matching lines @@
     },
 
     /**
      * @param {!WebInspector.Snippet} snippet
      */
     _snippetAdded: function(snippet)
     {
         this._snippets[snippet.id] = snippet;
     },
 
-    reset: function()
-    {
-        this._lastSnippetIdentifierSetting.set(0);
-        this._snippetsSetting.set([]);
-        this._snippets = {};
-    },
-
     __proto__: WebInspector.Object.prototype
 }
 
 /**
  * @constructor
  * @extends {WebInspector.Object}
  * @param {!WebInspector.SnippetStorage} storage
  * @param {string} id
  * @param {string=} name
  * @param {string=} content
@@ skipping 66 matching lines @@
     {
         var serializedSnippet = {};
         serializedSnippet.id = this.id;
         serializedSnippet.name = this.name;
         serializedSnippet.content = this.content;
         return serializedSnippet;
     },
 
     __proto__: WebInspector.Object.prototype
 }