Detach old frame on WebFrame::swap.

Source/core/frame/FrameClient.h

Index: Source/core/frame/FrameClient.h
diff --git a/Source/core/frame/FrameClient.h b/Source/core/frame/FrameClient.h
index 70e5d959f52a689721518d99ad9f27fdef0ac34c..945c71419481175f0671a72c7d2285018c169c87 100644
--- a/Source/core/frame/FrameClient.h
+++ b/Source/core/frame/FrameClient.h
@@ -13,6 +13,7 @@ class Frame;
 class LocalFrame;
 class MessageEvent;
 class SecurityOrigin;
+enum class FrameDetachType;
 
 class CORE_EXPORT FrameClient {
 public:
@@ -21,7 +22,7 @@ public:
     // TODO(dcheng): Move this into FrameLoaderClient, since remote frames don't
     // need this.
     virtual void willBeDetached() = 0;
-    virtual void detached() = 0;
+    virtual void detached(FrameDetachType) = 0;
 
     virtual Frame* opener() const = 0;
     virtual void setOpener(Frame*) = 0;