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

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

Index: third_party/WebKit/Source/devtools/front_end/resources/DatabaseModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/resources/DatabaseModel.js b/third_party/WebKit/Source/devtools/front_end/resources/DatabaseModel.js
index 89aa63bd3c466d2819bb9679dfd32218d0136b7d..157e995c19c52b3d9b738dda160afeb49213f3b1 100644
--- a/third_party/WebKit/Source/devtools/front_end/resources/DatabaseModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/resources/DatabaseModel.js
@@ -143,10 +143,12 @@ WebInspector.DatabaseModel = function(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 = {
@@ -154,11 +156,20 @@ WebInspector.DatabaseModel.prototype = {
     {
         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>}
      */