Add an iframe permissions= attribute for implementing permission delegation

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 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 1490 matching lines @@
 }
 
 LocalFrame* WebLocalFrameImpl::createChildFrame(const FrameLoadRequest& request,
     const AtomicString& name, HTMLFrameOwnerElement* ownerElement)
 {
     DCHECK(m_client);
     TRACE_EVENT0("blink", "WebLocalFrameImpl::createChildframe");
     WebTreeScopeType scope = frame()->document() == ownerElement->treeScope()
         ? WebTreeScopeType::Document
         : WebTreeScopeType::Shadow;
-    WebFrameOwnerProperties ownerProperties(ownerElement->scrollingMode(), ownerElement->marginWidth(), ownerElement->marginHeight(), ownerElement->allowFullscreen());
+    WebFrameOwnerProperties ownerProperties(ownerElement->scrollingMode(), ownerElement->marginWidth(), ownerElement->marginHeight(), ownerElement->allowFullscreen(), *ownerElement->delegatedPermissions());

[tkent, 2016/06/23 04:57:28]

Can ownerElement->delegatePermission() be nullptr?

[raymes, 2016/06/27 08:09:50]

Same here.

     // FIXME: Using subResourceAttributeName as fallback is not a perfect
     // solution. subResourceAttributeName returns just one attribute name. The
     // element might not have the attribute, and there might be other attributes
     // which can identify the element.
     AtomicString uniqueName = frame()->tree().calculateUniqueNameForNewChildFrame(
         name, ownerElement->getAttribute(ownerElement->subResourceAttributeName()));
     WebLocalFrameImpl* webframeChild = toWebLocalFrameImpl(m_client->createChildFrame(this, scope, name, uniqueName, static_cast<WebSandboxFlags>(ownerElement->getSandboxFlags()), ownerProperties));
     if (!webframeChild)
         return nullptr;
 
@@ skipping 592 matching lines @@
 {
     frame()->loader().forceSandboxFlags(static_cast<SandboxFlags>(flags));
 }
 
 void WebLocalFrameImpl::clearActiveFindMatch()
 {
     ensureTextFinder().clearActiveFindMatch();
 }
 
 } // namespace blink