Changes to content/ to facilitate new zoom extension API

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_
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
 //
@@ skipping 110 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.
   // DEPRECATED: This is fired in two situations: when the render process
   // crashes, in which case use WebContentsObserver::RenderProcessGone, and when
   // the WebContents is being torn down, in which case use
   // WebContentsObserver::WebContentsDestroyed()
   NOTIFICATION_WEB_CONTENTS_DISCONNECTED,
 
+  // This notification is sent when a WebContents no longer needs a temporary
+  // zoom level maintained for it. This happens when the Webcontents
+  // returns to the default zoom mode.
+  NOTIFICATION_WEB_CONTENTS_NO_TEMPORARY_ZOOM_LEVEL,
+
   // 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.
   // DEPRECATED: Use WebContentsObserver::TitleWasSet()
   NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED,
 
   // 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>.
   // DEPRECATED: Use WebContentsObserver::WebContentsDestroyed()
   NOTIFICATION_WEB_CONTENTS_DESTROYED,
 
+  // This notification is sent when a WebContents's zoom level is being changed.
+  NOTIFICATION_WEB_CONTENTS_ZOOM_CHANGE,

[Fady Samuel, 2014/04/07 21:27:24]

I think we can get rid of this notification if we have a callback?

[paulmeyer, 2014/04/08 21:13:20]

No, this is the one that needs to be replaced using observers, which I will do
in my next big edit.

+
   // A RenderViewHost was created for a WebContents. The source is the
   // associated WebContents, and the details is the RenderViewHost
   // pointer.
   NOTIFICATION_WEB_CONTENTS_RENDER_VIEW_HOST_CREATED,
 
   // Indicates that a RenderProcessHost was created and its handle is now
   // available. The source will be the RenderProcessHost that corresponds to
   // the process.
   NOTIFICATION_RENDERER_PROCESS_CREATED,
 
@@ skipping 60 matching lines @@
   // the RenderViewHost, and the details is a DomOperationNotificationDetails.
   NOTIFICATION_DOM_OPERATION_RESPONSE,
 
   // Custom notifications used by the embedder should start from here.
   NOTIFICATION_CONTENT_END,
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_