diff --git a/content/xul/content/src/nsXULTreeElement.cpp b/content/xul/content/src/nsXULTreeElement.cpp
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/content/xul/content/src/nsXULTreeElement.h b/content/xul/content/src/nsXULTreeElement.h
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/dom/public/xul/nsIDOMXULTreeElement.h b/dom/public/xul/nsIDOMXULTreeElement.h
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/dom/src/xul/nsJSXULTreeElement.cpp b/dom/src/xul/nsJSXULTreeElement.cpp
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/rdf/content/public/nsIDOMXULTreeElement.h b/rdf/content/public/nsIDOMXULTreeElement.h
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/rdf/content/src/nsJSXULTreeElement.cpp b/rdf/content/src/nsJSXULTreeElement.cpp
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/rdf/content/src/nsRDFMenuBuilder.cpp b/rdf/content/src/nsRDFMenuBuilder.cpp
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index 00000000000..e69de29bb2d
diff --git a/rdf/content/src/nsRDFToolbarBuilder.cpp b/rdf/content/src/nsRDFToolbarBuilder.cpp
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/rdf/content/src/nsRDFTreeBuilder.cpp b/rdf/content/src/nsRDFTreeBuilder.cpp
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/rdf/content/src/nsXULTreeElement.cpp b/rdf/content/src/nsXULTreeElement.cpp
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/rdf/content/src/nsXULTreeElement.h b/rdf/content/src/nsXULTreeElement.h
new file mode 100644
index 00000000000..e69de29bb2d