✀ Remove postMessage plumbing for swappedout:// ✀

third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 106 matching lines @@
         , m_window(window)
     {
     }
 
     Member<LocalDOMWindow> m_window;
 };
 
 class PostMessageTimer final : public GarbageCollectedFinalized<PostMessageTimer>, public SuspendableTimer {
     USING_GARBAGE_COLLECTED_MIXIN(PostMessageTimer);
 public:
-    PostMessageTimer(LocalDOMWindow& window, MessageEvent* event, SecurityOrigin* targetOrigin, PassRefPtr<ScriptCallStack> stackTrace, UserGestureToken* userGestureToken)
+    PostMessageTimer(LocalDOMWindow& window, MessageEvent* event, PassRefPtr<SecurityOrigin> targetOrigin, PassRefPtr<ScriptCallStack> stackTrace, UserGestureToken* userGestureToken)
         : SuspendableTimer(window.document())
         , m_event(event)
         , m_window(&window)
         , m_targetOrigin(targetOrigin)
         , m_stackTrace(stackTrace)
         , m_userGestureToken(userGestureToken)
         , m_disposalAllowed(true)
     {
         InspectorInstrumentation::asyncTaskScheduled(window.document(), "postMessage", this);
     }
@@ skipping 518 matching lines @@
     return m_applicationCache.get();
 }
 
 Navigator* LocalDOMWindow::navigator() const
 {
     if (!m_navigator)
         m_navigator = Navigator::create(frame());
     return m_navigator.get();
 }
 
-void LocalDOMWindow::schedulePostMessage(MessageEvent* event, SecurityOrigin* target, PassRefPtr<ScriptCallStack> stackTrace)
+void LocalDOMWindow::schedulePostMessage(MessageEvent* event, PassRefPtr<SecurityOrigin> target, Document* source)
 {
     // Allowing unbounded amounts of messages to build up for a suspended context
     // is problematic; consider imposing a limit or other restriction if this
     // surfaces often as a problem (see crbug.com/587012).
 
+    // Capture stack trace only when inspector front-end is loaded as it may be time consuming.
+    RefPtr<ScriptCallStack> stackTrace;
+    if (InspectorInstrumentation::consoleAgentEnabled(source))
+        stackTrace = ScriptCallStack::capture();
+
     // Schedule the message.
-    PostMessageTimer* timer = new PostMessageTimer(*this, event, target, stackTrace, UserGestureIndicator::currentToken());
+    PostMessageTimer* timer = new PostMessageTimer(*this, event, target, stackTrace.release(), UserGestureIndicator::currentToken());
     timer->startOneShot(0, BLINK_FROM_HERE);
     timer->suspendIfNeeded();
     m_postMessageTimers.add(timer);
 }
 
 void LocalDOMWindow::postMessageTimerFired(PostMessageTimer* timer)
 {
     if (!isCurrentlyDisplayedInFrame())
         return;
 
@@ skipping 846 matching lines @@
 {
     // If the LocalDOMWindow still has a frame reference, that frame must point
     // back to this LocalDOMWindow: otherwise, it's easy to get into a situation
     // where script execution leaks between different LocalDOMWindows.
     if (m_frameObserver->frame())
         ASSERT_WITH_SECURITY_IMPLICATION(m_frameObserver->frame()->domWindow() == this);
     return m_frameObserver->frame();
 }
 
 } // namespace blink