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

Source/web/RemoteFrameClientImpl.h

Index: Source/web/RemoteFrameClientImpl.h
diff --git a/Source/web/RemoteFrameClientImpl.h b/Source/web/RemoteFrameClientImpl.h
index c1e189677ec51535f967a64416e0dd81eb353db0..38d20f5f15f8a9a1b45cde350108fb14f6f35fb0 100644
--- a/Source/web/RemoteFrameClientImpl.h
+++ b/Source/web/RemoteFrameClientImpl.h
@@ -10,11 +10,13 @@
 namespace blink {
 class WebRemoteFrameImpl;
 
-class RemoteFrameClientImpl : public RemoteFrameClient {
+class RemoteFrameClientImpl final : public RemoteFrameClient {
 public:
     explicit RemoteFrameClientImpl(WebRemoteFrameImpl*);
 
     // FrameClient overrides:
+    virtual bool inShadowTree() const override;
+

[hayato, 2015/05/18 05:08:50]

Remove this empty line? The comment L17 applies to L20-L21?

[dcheng, 2015/05/18 05:19:14]

Done.

     virtual void willBeDetached() override;
     virtual void detached() override;