Remove lots of code from the WebWidget/WebView/WebFrame layer.

sky/engine/core/page/Page.h

Index: sky/engine/core/page/Page.h
diff --git a/sky/engine/core/page/Page.h b/sky/engine/core/page/Page.h
index 03b074e41a52a7e78ba63a43eb75ecdddfa6e650..92508d505f874295473adb9bc790b60270a70689 100644
--- a/sky/engine/core/page/Page.h
+++ b/sky/engine/core/page/Page.h
@@ -96,9 +96,6 @@ public:
 
     void documentDetached(Document*);
 
-    bool openedByDOM() const;
-    void setOpenedByDOM();
-
     PageAnimator& animator() { return m_animator; }
     Chrome& chrome() const { return *m_chrome; }
     AutoscrollController& autoscrollController() const { return *m_autoscrollController; }
@@ -185,8 +182,6 @@ private:
 
     UseCounter m_useCounter;
 
-    bool m_openedByDOM;
-
     bool m_tabKeyCyclesThroughElements;
 
     float m_deviceScaleFactor;