Revert of Update Blink to use the tree scope info on WebFrame for scoping checks.

Source/core/frame/LocalFrame.cpp

Index: Source/core/frame/LocalFrame.cpp
diff --git a/Source/core/frame/LocalFrame.cpp b/Source/core/frame/LocalFrame.cpp
index 2417e620887fbacb9c14128f7992983558fb301c..b3010ce4c8a6ba0c95bf9042a085ea3818b86d15 100644
--- a/Source/core/frame/LocalFrame.cpp
+++ b/Source/core/frame/LocalFrame.cpp
@@ -409,6 +409,19 @@
     return curFrame;
 }
 
+bool LocalFrame::inScope(TreeScope* scope) const
+{
+    ASSERT(scope);
+    Document* doc = document();
+    if (!doc)
+        return false;
+    // FIXME: This check is broken in for OOPI.
+    HTMLFrameOwnerElement* owner = doc->ownerElement();
+    if (!owner)
+        return false;
+    return owner->treeScope() == scope;
+}
+
 String LocalFrame::layerTreeAsText(LayerTreeFlags flags) const
 {
     TextStream textStream;