Implement PermissionService::GetNextPermissionChange.

content/public/browser/content_browser_client.cc

 // 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.
 
 #include "content/public/browser/content_browser_client.h"
 
 #include "base/files/file_path.h"
 #include "content/public/browser/client_certificate_delegate.h"
 #include "ui/gfx/image/image_skia.h"
 #include "url/gurl.h"
@@ skipping 223 matching lines @@
 }
 
 PermissionStatus ContentBrowserClient::GetPermissionStatus(
     PermissionType permission,
     BrowserContext* browser_context,
     const GURL& requesting_origin,
     const GURL& embedding_origin) {
   return PERMISSION_STATUS_DENIED;
 }
 
+int ContentBrowserClient::SubscribePermissionStatusChange(
+    PermissionType permission,
+    BrowserContext* browser_context,
+    const GURL& requesting_origin,
+    const GURL& embedding_origin,
+    const base::Callback<void(PermissionStatus)>& callback) {
+  return 0;
+}
+
 bool ContentBrowserClient::CanCreateWindow(
     const GURL& opener_url,
     const GURL& opener_top_level_frame_url,
     const GURL& source_origin,
     WindowContainerType container_type,
     const GURL& target_url,
     const Referrer& referrer,
     WindowOpenDisposition disposition,
     const blink::WebWindowFeatures& features,
     bool user_gesture,
@@ skipping 106 matching lines @@
 
 #if defined(VIDEO_HOLE)
 ExternalVideoSurfaceContainer*
 ContentBrowserClient::OverrideCreateExternalVideoSurfaceContainer(
     WebContents* web_contents) {
   return nullptr;
 }
 #endif
 
 }  // namespace content