Plumb document's strict mixed content checking for RemoteFrames

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 5749 matching lines @@
 {
     if (frame())
         return m_frame->frameScheduler()->timerTaskRunner();
     if (m_importsController)
         return m_importsController->master()->timerTaskRunner();
     if (m_contextDocument)
         return m_contextDocument->timerTaskRunner();
     return Platform::current()->currentThread()->scheduler()->timerTaskRunner();
 }
 
+void Document::enforceStrictMixedContentChecking()
+{
+    securityContext().setShouldEnforceStrictMixedContentChecking(true);
+    if (frame())

[dcheng, 2015/12/16 10:18:19]

So I have a dumb question.

It looks like the only time frame() will be null is if we're creating a detached
Document via something like document.implementation.createDocument().

What is the effect of enabling CSP on a detached Document? Is there a way to
load this detached Document directly?

[estark, 2015/12/16 21:01:18]

Hmmm... I have no idea. Mike, do you know the answer to this? 

+        frame()->loader().client()->didEnforceStrictMixedContentChecking();
+}
+
 DEFINE_TRACE(Document)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_importsController);
     visitor->trace(m_docType);
     visitor->trace(m_implementation);
     visitor->trace(m_autofocusElement);
     visitor->trace(m_focusedElement);
     visitor->trace(m_hoverNode);
     visitor->trace(m_activeHoverElement);
@@ skipping 58 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     Document::WeakDocumentSet& set = Document::liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif