Enable devtools via context menu in platform apps and popup extensions.

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 173 matching lines @@
   // browsers have closed. This is sent if the user chooses to exit
   // (via exit menu item or keyboard shortcut) or to restart the process
   // (such as in flags page), not if Chrome exists by some other means
   // (such as the user closing the last window). Note that receiving this
   // notification does not necessarily mean the process will exit
   // because the shutdown process can be cancelled by unload handler.
   // Use APP_TERMINATING for such needs.
   //  The source and details are unspecified.
   NOTIFICATION_APP_EXITING,
 
+  // Indicates that a devtools window is opening. The source is the
+  // content::BrowserContext* and the details is the inspected RenderViewHost*.
+  NOTIFICATION_DEVTOOLS_WINDOW_OPENING,
+
   // Indicates that a devtools window is closing. The source is the
   // content::BrowserContext* and the details is the inspected RenderViewHost*.
   NOTIFICATION_DEVTOOLS_WINDOW_CLOSING,
 
   // Tabs --------------------------------------------------------------------
 
   // Sent when a tab is added to a WebContentsDelegate. The source is the
   // WebContentsDelegate and the details is the added content::WebContents.
   NOTIFICATION_TAB_ADDED,
 
@@ skipping 208 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_