Service CreateNewWindow on the UI thread with a new mojo interface

content/public/browser/content_browser_client.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_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 483 matching lines @@
   virtual MediaObserver* GetMediaObserver();
 
   // Returns the platform notification service, capable of displaying Web
   // Notifications to the user. The embedder can return a nullptr if they don't
   // support this functionality. May be called from any thread.
   virtual PlatformNotificationService* GetPlatformNotificationService();
 
   // Returns true if the given page is allowed to open a window of the given
   // type. If true is returned, |no_javascript_access| will indicate whether
   // the window that is created should be scriptable/in the same process.
-  // This is called on the IO thread.
+  // This is called on the UI thread.
   virtual bool CanCreateWindow(
-      int opener_render_process_id,
-      int opener_render_frame_id,
+      RenderFrameHost* opener,
       const GURL& opener_url,
       const GURL& opener_top_level_frame_url,
       const GURL& source_origin,
       content::mojom::WindowContainerType container_type,
       const GURL& target_url,
       const Referrer& referrer,
       const std::string& frame_name,
       WindowOpenDisposition disposition,
       const blink::mojom::WindowFeatures& features,
       bool user_gesture,
       bool opener_suppressed,
-      ResourceContext* context,
       bool* no_javascript_access);
 
   // Notifies the embedder that the ResourceDispatcherHost has been created.
   // This is when it can optionally add a delegate.
   virtual void ResourceDispatcherHostCreated() {}
 
   // Allows the embedder to return a delegate for the SpeechRecognitionManager.
   // The delegate will be owned by the manager. It's valid to return nullptr.
   virtual SpeechRecognitionManagerDelegate*
       CreateSpeechRecognitionManagerDelegate();
@@ skipping 297 matching lines @@
   virtual bool ShouldRedirectDOMStorageTaskRunner();
 
   // If this returns true, all BrowserThreads (but UI/IO) that support it on
   // this platform will experimentally be redirected to TaskScheduler.
   virtual bool RedirectNonUINonIOBrowserThreadsToTaskScheduler();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_