DevTools: introduce the Clear storage pane in the resources panel.

third_party/WebKit/Source/devtools/front_end/resources/DatabaseModel.js

 /*
  * Copyright (C) 2007, 2008 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 125 matching lines @@
  * @constructor
  * @extends {WebInspector.SDKModel}
  * @param {!WebInspector.Target} target
  */
 WebInspector.DatabaseModel = function(target)
 {
     WebInspector.SDKModel.call(this, WebInspector.DatabaseModel, target);
 
     this._databases = [];
     this._agent = target.databaseAgent();
+    this.target().registerDatabaseDispatcher(new WebInspector.DatabaseDispatcher(this));
 }
 
 WebInspector.DatabaseModel.Events = {
-    DatabaseAdded: "DatabaseAdded"
+    DatabaseAdded: "DatabaseAdded",
+    DatabasesRemoved: "DatabasesRemoved"
 }
 
 WebInspector.DatabaseModel.prototype = {
     enable: function()
     {
         if (this._enabled)
             return;
-        this.target().registerDatabaseDispatcher(new WebInspector.DatabaseDispatcher(this));
         this._agent.enable();
         this._enabled = true;
     },
 
+    disable: function()
+    {
+        if (!this._enabled)
+            return;
+        this._enabled = false;
+        this._databases = [];
+        this._agent.disable();
+        this.dispatchEventToListeners(WebInspector.DatabaseModel.Events.DatabasesRemoved);
+    },
+
     /**
      * @return {!Array.<!WebInspector.Database>}
      */
     databases: function()
     {
         var result = [];
         for (var database of this._databases)
             result.push(database);
         return result;
     },
@@ skipping 41 matching lines @@
  * @param {!WebInspector.Target} target
  * @return {!WebInspector.DatabaseModel}
  */
 WebInspector.DatabaseModel.fromTarget = function(target)
 {
     if (!target[WebInspector.DatabaseModel._symbol])
         target[WebInspector.DatabaseModel._symbol] = new WebInspector.DatabaseModel(target);
 
     return target[WebInspector.DatabaseModel._symbol];
 }