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

Source/web/WebRemoteFrameImpl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebRemoteFrameImpl_h
 #define WebRemoteFrameImpl_h
 
 #include "core/frame/FrameOwner.h"
 #include "platform/heap/Handle.h"
 #include "public/web/WebRemoteFrame.h"
 #include "public/web/WebRemoteFrameClient.h"
 #include "web/RemoteFrameClientImpl.h"
 #include "wtf/HashMap.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
 class FrameHost;
 class FrameOwner;
 class RemoteFrame;
 
 class WebRemoteFrameImpl final : public RefCountedWillBeGarbageCollectedFinalized<WebRemoteFrameImpl>, public WebRemoteFrame {
 public:
-    explicit WebRemoteFrameImpl(WebRemoteFrameClient*);
+    static WebRemoteFrame* create(WebTreeScopeType, WebRemoteFrameClient*);
     virtual ~WebRemoteFrameImpl();
 
     // WebRemoteFrame methods.
     virtual bool isWebLocalFrame() const override;
     virtual WebLocalFrame* toWebLocalFrame() override;
     virtual bool isWebRemoteFrame() const override;
     virtual WebRemoteFrame* toWebRemoteFrame() override;
     virtual void close() override;
     virtual WebString uniqueName() const override;
     virtual WebString assignedName() const override;
@@ skipping 126 matching lines @@
     virtual WebString contentAsText(size_t maxChars) const override;
     virtual WebString contentAsMarkup() const override;
     virtual WebString layoutTreeAsText(LayoutAsTextControls toShow = LayoutAsTextNormal) const override;
     virtual WebString markerTextForListItem(const WebElement&) const override;
     virtual WebRect selectionBoundsRect() const override;
 
     virtual bool selectionStartHasSpellingMarkerFor(int from, int length) const override;
     virtual WebString layerTreeAsText(bool showDebugInfo = false) const override;
 
     virtual WebLocalFrame* createLocalChild(const WebString& name, WebSandboxFlags, WebFrameClient*, WebFrame* previousSibling) override;
+    virtual WebLocalFrame* createLocalChild(WebTreeScopeType, const WebString& name, WebSandboxFlags, WebFrameClient*, WebFrame* previousSibling) override;
     virtual WebRemoteFrame* createRemoteChild(const WebString& name, WebSandboxFlags, WebRemoteFrameClient*) override;
+    virtual WebRemoteFrame* createRemoteChild(WebTreeScopeType, const WebString& name, WebSandboxFlags, WebRemoteFrameClient*) override;
 
     void initializeCoreFrame(FrameHost*, FrameOwner*, const AtomicString& name);
 
     void setCoreFrame(PassRefPtrWillBeRawPtr<RemoteFrame>);
     RemoteFrame* frame() const { return m_frame.get(); }
 
     WebRemoteFrameClient* client() const { return m_client; }
 
     static WebRemoteFrameImpl* fromFrame(RemoteFrame&);
 
     virtual void initializeFromFrame(WebLocalFrame*) const override;
 
     virtual void setReplicatedOrigin(const WebSecurityOrigin&) const override;
     virtual void setReplicatedSandboxFlags(WebSandboxFlags) const override;
     virtual void setReplicatedName(const WebString&) const override;
     virtual void DispatchLoadEventForFrameOwner() const override;
 
     void didStartLoading() override;
     void didStopLoading() override;
 
 #if ENABLE(OILPAN)
     DECLARE_TRACE();
 #endif
 
 private:
+    WebRemoteFrameImpl(WebTreeScopeType, WebRemoteFrameClient*);
+
     RemoteFrameClientImpl m_frameClient;
     RefPtrWillBeMember<RemoteFrame> m_frame;
     WebRemoteFrameClient* m_client;
 
     WillBeHeapHashMap<WebFrame*, OwnPtrWillBeMember<FrameOwner>> m_ownersForChildren;
 
 #if ENABLE(OILPAN)
     // Oilpan: to provide the guarantee of having the frame live until
     // close() is called, an instance keep a self-persistent. It is
     // cleared upon calling close(). This avoids having to assume that
     // an embedder's WebFrame references are all discovered via thread
     // state (stack, registers) should an Oilpan GC strike while we're
     // in the process of detaching.
     GC_PLUGIN_IGNORE("340522")
     Persistent<WebRemoteFrameImpl> m_selfKeepAlive;
 #endif
 };
 
 DEFINE_TYPE_CASTS(WebRemoteFrameImpl, WebFrame, frame, frame->isWebRemoteFrame(), frame.isWebRemoteFrame());
 
 } // namespace blink
 
 #endif // WebRemoteFrameImpl_h