Refactor mixed content checks against the top frame into MixedContentChecker.

Source/modules/websockets/MainThreadWebSocketChannel.cpp

 /*
  * 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 79 matching lines @@
 }
 
 bool MainThreadWebSocketChannel::connect(const KURL& url, const String& protocol)
 {
     WTF_LOG(Network, "MainThreadWebSocketChannel %p connect()", this);
     ASSERT(!m_handle);
     ASSERT(!m_suspended);
 
     if (m_document->frame() && !m_document->frame()->loader().mixedContentChecker()->canConnectInsecureWebSocket(m_document->securityOrigin(), url))
         return false;
-    Frame* top = m_document->frame()->tree().top();
-    if (top != m_document->frame() && !toLocalFrame(top)->loader().mixedContentChecker()->canConnectInsecureWebSocket(toLocalFrame(top)->document()->securityOrigin(), url))
-        return false;
     if (MixedContentChecker::isMixedContent(m_document->securityOrigin(), url)) {

[Mike West, 2014/06/30 12:24:37]

This is here in case the user has flipped the about:flag we're talking about in
the other CL. I'm not at all sure that it's necessary, since we'll still be
throwing the passive-content warning, but it's our current behavior.

         String message = "Connecting to a non-secure WebSocket server from a secure origin is deprecated.";
         m_document->addConsoleMessage(JSMessageSource, WarningMessageLevel, message);
     }
 
     m_handshake = adoptPtrWillBeNoop(new WebSocketHandshake(url, protocol, m_document));
     m_handshake->reset();
     m_handshake->addExtensionProcessor(m_perMessageDeflate.createExtensionProcessor());
     m_handshake->addExtensionProcessor(m_deflateFramer.createExtensionProcessor());
     if (m_identifier) {
         TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "WebSocketCreate", "data", InspectorWebSocketCreateEvent::data(m_document, m_identifier, url, protocol));
@@ skipping 760 matching lines @@
 {
     visitor->trace(m_document);
     visitor->trace(m_client);
     visitor->trace(m_handshake);
     visitor->trace(m_handle);
     WebSocketChannel::trace(visitor);
     SocketStreamHandleClient::trace(visitor);
 }
 
 } // namespace WebCore