Implement the infrastructure of creating WorkerFetchContext in worker global scope.

third_party/WebKit/public/web/WebFrameClient.h

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 81 matching lines @@
 class WebPresentationClient;
 class WebPushClient;
 class WebRTCPeerConnectionHandler;
 class WebRelatedAppsFetcher;
 class WebScreenOrientationClient;
 class WebString;
 class WebURL;
 class WebURLResponse;
 class WebUserMediaClient;
 class WebWorkerContentSettingsClientProxy;
+class WebWorkerFetchContext;
 struct WebColorSuggestion;
 struct WebConsoleMessage;
 struct WebContextMenuData;
 struct WebPluginParams;
 struct WebPopupMenuInfo;
 struct WebRect;
 struct WebURLError;
 
 class BLINK_EXPORT WebFrameClient {
  public:
@@ skipping 27 matching lines @@
 
   // May return null.
   virtual WebServiceWorkerProvider* CreateServiceWorkerProvider() { return 0; }
 
   // May return null.
   virtual WebWorkerContentSettingsClientProxy*
   CreateWorkerContentSettingsClientProxy() {
     return 0;
   }
 
+  // Returns a new WebWorkerFetchContext for a dedicated (or shared) worker.
+  // Ownership of the returned object is transferred to the caller. This is used
+  // only when off-main-thread-fetch is enabled.
+  virtual WebWorkerFetchContext* CreateWorkerFetchContext() { return 0; }

[kinuko, 2017/04/19 11:08:14]

nit: return nullptr for new code

[horo, 2017/04/19 13:52:27]

Done.

+
   // Create a new WebPopupMenu. In the "createExternalPopupMenu" form, the
   // client is responsible for rendering the contents of the popup menu.
   virtual WebExternalPopupMenu* CreateExternalPopupMenu(
       const WebPopupMenuInfo&,
       WebExternalPopupMenuClient*) {
     return 0;
   }
 
   // Services ------------------------------------------------------------
 
@@ skipping 598 matching lines @@
   // Overwrites the given URL to use an HTML5 embed if possible.
   // An empty URL is returned if the URL is not overriden.
   virtual WebURL OverrideFlashEmbedWithHTML(const WebURL& url) {
     return WebURL();
   }
 };
 
 }  // namespace blink
 
 #endif