Plumbing blink::Interface{Provider|Registry} through WebLocalFrame's constructor.

third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp

 /*
  * Copyright (C) 2013 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 281 matching lines @@
   WebSettings* settings = m_webView->settings();
   // FIXME: http://crbug.com/363843. This needs to find a better way to
   // not create graphics layers.
   settings->setAcceleratedCompositingEnabled(false);
   // Currently we block all mixed-content requests from a ServiceWorker.
   // FIXME: When we support FetchEvent.default(), we should relax this
   // restriction.
   settings->setStrictMixedContentChecking(true);
   settings->setAllowRunningOfInsecureContent(false);
   settings->setDataSaverEnabled(m_workerStartData.dataSaverEnabled);
-  m_mainFrame = toWebLocalFrameImpl(
-      WebLocalFrame::create(WebTreeScopeType::Document, this));
+  m_mainFrame = toWebLocalFrameImpl(WebLocalFrame::create(
+      WebTreeScopeType::Document, this, nullptr, nullptr));

[Łukasz Anforowicz, 2017/01/23 23:38:16]

blink::WebEmbeddedWorkerImpl doesn't override interface{Provider|Registry}, so
it just inherits the default implementation from blink::WebFrameClient which
used to return nullptr.

   m_webView->setMainFrame(m_mainFrame.get());
   m_mainFrame->setDevToolsAgentClient(this);
 
   // If we were asked to wait for debugger then it is the good time to do that.
   m_workerContextClient->workerReadyForInspection();
   if (m_workerStartData.waitForDebuggerMode ==
       WebEmbeddedWorkerStartData::WaitForDebugger) {
     m_waitingForDebuggerState = WaitingForDebugger;
     return;
   }
@@ skipping 161 matching lines @@
       *this, *document, *m_workerContextClient);
   m_loaderProxy = WorkerLoaderProxy::create(this);
   m_workerThread =
       ServiceWorkerThread::create(m_loaderProxy, *m_workerGlobalScopeProxy);
   m_workerThread->start(std::move(startupData));
   m_workerInspectorProxy->workerThreadCreated(document, m_workerThread.get(),
                                               scriptURL);
 }
 
 }  // namespace blink