Browser Plugin: WebContents should notify when it's restored

content/public/browser/notification_types.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_
 #define CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_
 #pragma once
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
@@ skipping 194 matching lines @@
   // This message is sent after a WebContents is disconnected from the
   // renderer process.  The source is a Source<WebContents> with a pointer to
   // the WebContents (the pointer is usable).  No details are expected.
   NOTIFICATION_WEB_CONTENTS_DISCONNECTED,
 
   // This notification is sent after WebContents' title is updated. The source
   // is a Source<WebContents> with a pointer to the WebContents. The details
   // is a std::pair<NavigationEntry*, bool> that contains more information.
   NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED,
 
-  // This notification is sent when a WebContents is being hidden, e.g. due
-  // to switching away from this tab.  The source is a Source<WebContents>.
-  NOTIFICATION_WEB_CONTENTS_HIDDEN,
+  // Indicates a WebContents has been hidden or restored.  The source is
+  // a Source<WebContents>. The details is a bool set to true if the new
+  // state is visible.
+  NOTIFICATION_WEB_CONTENTS_VISIBILITY_CHANGED,
 
   // This notification is sent when a WebContents is being destroyed. Any
   // object holding a reference to a WebContents can listen to that
   // notification to properly reset the reference. The source is a
   // Source<WebContents>.
   NOTIFICATION_WEB_CONTENTS_DESTROYED,
 
   // A RenderViewHost was created for a WebContents. The source is the
   // associated WebContents, and the details is the RenderViewHost
   // pointer.
@@ skipping 154 matching lines @@
   // of a temporary zoom level change, the details is an empty string.
   NOTIFICATION_ZOOM_LEVEL_CHANGED,
 
   // Custom notifications used by the embedder should start from here.
   NOTIFICATION_CONTENT_END,
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_