Plumb whether or not a frame is in shadow DOM to the embedder.

public/web/WebFrameClient.h

 /*
  * 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 37 matching lines @@
 #include "public/platform/WebFileSystemType.h"
 #include "public/platform/WebSecurityOrigin.h"
 #include "public/platform/WebStorageQuotaCallbacks.h"
 #include "public/platform/WebStorageQuotaType.h"
 #include "public/platform/WebURLError.h"
 #include "public/platform/WebURLRequest.h"
 #include <v8.h>
 
 namespace blink {
 
+enum class WebTreeScopeType;
 class WebApplicationCacheHost;
 class WebApplicationCacheHostClient;
 class WebAppBannerClient;
 class WebCachedURLRequest;
 class WebColorChooser;
 class WebColorChooserClient;
 class WebContentDecryptionModule;
 class WebCookieJar;
 class WebDataSource;
 class WebEncryptedMediaClient;
@@ skipping 74 matching lines @@
     // document of a main frame. After this, it is no longer safe to show a
     // pending navigation's URL, because a URL spoof is possible.
     virtual void didAccessInitialDocument(WebLocalFrame*) { }
 
     // A child frame was created in this frame. This is called when the frame
     // is created and initialized. Takes the name of the new frame, the parent
     // frame and returns a new WebFrame. The WebFrame is considered in-use
     // until frameDetached() is called on it.
     // Note: If you override this, you should almost certainly be overriding
     // frameDetached().
+    virtual WebFrame* createChildFrame(WebLocalFrame* parent, WebTreeScopeType, const WebString& frameName, WebSandboxFlags sandboxFlags) { return nullptr; }
+    // TODO(dcheng): Remove this overload, since it's deprecated.
     virtual WebFrame* createChildFrame(WebLocalFrame* parent, const WebString& frameName, WebSandboxFlags sandboxFlags) { return nullptr; }
 
     // This frame set its opener to null, disowning it.
     // See http://html.spec.whatwg.org/#dom-opener.
     virtual void didDisownOpener(WebLocalFrame*) { }
 
     // This frame has been detached from the view, but has not been closed yet.
     virtual void frameDetached(WebFrame*) { }
 
     // This frame has become focused..
@@ skipping 490 matching lines @@
     // App Banners ---------------------------------------------------------
     virtual WebAppBannerClient* appBannerClient() { return 0; }
 
 protected:
     virtual ~WebFrameClient() { }
 };
 
 } // namespace blink
 
 #endif