Checking in missing files.

toolkit/components/help/locale/en-US/help/help.properties

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+showSidebarLabel=Show Sidebar
+hideSidebarLabel=Hide Sidebar

toolkit/components/help/skin/contents.rdf

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+<RDF:RDF xmlns:RDF="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+         xmlns:chrome="http://www.mozilla.org/rdf/chrome#">
+
+  <!-- List all the skins being supplied by this theme -->
+  <RDF:Seq about="urn:mozilla:skin:root">
+    <RDF:li resource="urn:mozilla:skin:classic/1.0" />
+  </RDF:Seq>
+
+  <!-- classic Information -->
+  <RDF:Description about="urn:mozilla:skin:classic/1.0">
+    <chrome:packages>
+      <RDF:Seq about="urn:mozilla:skin:classic/1.0:packages">
+        <RDF:li resource="urn:mozilla:skin:classic/1.0:help"/>
+      </RDF:Seq>
+    </chrome:packages>
+  </RDF:Description>
+ 
+  <!-- Version Information.  State that we work only with major version 1 of this
+       package. -->
+  <RDF:Description about="urn:mozilla:skin:classic/1.0:help"
+    chrome:skinVersion="1.5"/>
+ </RDF:RDF>
+