Issue #1603 - Part 1: Reorganize ScriptLoader/ScriptElement

- Moves scripting parts of DOM into 'dom/script'
- Renames nsScript{Loader/Element} to Script{Loader/Element}
- Adjusts all callers

dom/base/nsContentSink.h

@@ -36,13 +36,16 @@ class nsIAtom;
 class nsIChannel;
 class nsIContent;
 class nsNodeInfoManager;
-class nsScriptLoader;
 class nsIApplicationCache;
 
 namespace mozilla {
 namespace css {
 class Loader;
 } // namespace css
+
+namespace dom {
+class ScriptLoader;
+} // namespace dom
 } // namespace mozilla
 
 #ifdef DEBUG
@@ -273,7 +276,7 @@ protected:
   nsCOMPtr<nsIDocShell>         mDocShell;
   RefPtr<mozilla::css::Loader> mCSSLoader;
   RefPtr<nsNodeInfoManager>   mNodeInfoManager;
-  RefPtr<nsScriptLoader>      mScriptLoader;
+  RefPtr<mozilla::dom::ScriptLoader> mScriptLoader;
 
   // back off timer notification after count
   int32_t mBackoffCount;