Upgrade insecure requests: Pipe navigational hosts down into nested documents.

Source/core/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 1399 matching lines @@
 {
     Frame* parentFrame = m_frame->tree().parent();
     if (!parentFrame)
         return SecurityContext::InsecureRequestsDoNotUpgrade;
 
     // FIXME: We need a way to propagate insecure requests policy flags to
     // out-of-process frames. For now, we'll always use default behavior.
     if (!parentFrame->isLocalFrame())
         return SecurityContext::InsecureRequestsDoNotUpgrade;
 
+    ASSERT(toLocalFrame(parentFrame)->document());
     return toLocalFrame(parentFrame)->document()->insecureRequestsPolicy();
 }
 
+SecurityContext::InsecureNavigationsSet* FrameLoader::insecureNavigationsToUpgrade() const
+{
+    ASSERT(m_frame);
+    Frame* parentFrame = m_frame->tree().parent();
+    if (!parentFrame)
+        return nullptr;
+
+    // FIXME: We need a way to propagate insecure requests policy flags to
+    // out-of-process frames. For now, we'll always use default behavior.
+    if (!parentFrame->isLocalFrame())
+        return nullptr;
+
+    return toLocalFrame(parentFrame)->document()->insecureNavigationsToUpgrade();

[Yoav Weiss, 2015/03/18 09:48:35]

Yeah, obviously parentFrame should have a document. That's what 3 hour of sleep
nights get you... :)

Can you add an ASSERT above this line as well? 

+}
+
 } // namespace blink