Having to move gUAStyleSheet back into nsLayoutModule to reduce leak. Static nsCOMPtrs

just don't cut it, since they don't get released until after leaky runs.  This isn't
really a leak, but oh well.

layout/build/nsLayoutDLF.cpp

@@ -179,15 +179,10 @@ public:
                              nsCOMPtr<nsIDocumentViewer>*);
 
   static nsICSSStyleSheet* GetUAStyleSheet() {
-    return gUAStyleSheet;
+    return nsLayoutModule::gUAStyleSheet;
   }
-
-public:
-  static nsCOMPtr<nsICSSStyleSheet> gUAStyleSheet;
 };
 
-nsCOMPtr<nsICSSStyleSheet> nsLayoutDLF::gUAStyleSheet;
-
 nsresult
 NS_NewLayoutDocumentLoaderFactory(nsIDocumentLoaderFactory** aResult)
 {
@@ -255,7 +250,7 @@ nsLayoutDLF::CreateInstance(const char *aCommand,
                             nsIContentViewer** aDocViewer)
 {
   nsresult rv = NS_OK;
-  if (!nsLayoutDLF::gUAStyleSheet) {
+  if (!GetUAStyleSheet()) {
     // Load the UA style sheet
     nsCOMPtr<nsIURI> uaURL;
     rv = NS_NewURI(getter_AddRefs(uaURL), UA_CSS_URL);
@@ -264,7 +259,7 @@ nsLayoutDLF::CreateInstance(const char *aCommand,
       rv = NS_NewCSSLoader(getter_AddRefs(cssLoader));
       if (cssLoader) {
         PRBool complete;
-        rv = cssLoader->LoadAgentSheet(uaURL, *getter_AddRefs(nsLayoutDLF::gUAStyleSheet), complete,
+        rv = cssLoader->LoadAgentSheet(uaURL, nsLayoutModule::gUAStyleSheet, complete,
                                        nsnull);
       }
     }

layout/build/nsLayoutModule.cpp

@@ -159,6 +159,7 @@ LayoutScriptNameSet::AddNameSet(nsIScriptContext* aScriptContext)
 static NS_DEFINE_IID(kIModuleIID, NS_IMODULE_IID);
 
 nsIScriptNameSetRegistry* nsLayoutModule::gRegistry;
+nsICSSStyleSheet* nsLayoutModule::gUAStyleSheet = nsnull;
 
 nsLayoutModule::nsLayoutModule()
   : mInitialized(PR_FALSE)
@@ -247,6 +248,7 @@ nsLayoutModule::Shutdown()
   nsTextTransformer::Shutdown();
 
   NS_IF_RELEASE(gRegistry);
+  NS_IF_RELEASE(gUAStyleSheet);
 }
 
 NS_IMETHODIMP

layout/build/nsLayoutModule.h

@@ -53,6 +53,9 @@ protected:
   PRBool mInitialized;
 //  static nsIFactory* gFactory;
   static nsIScriptNameSetRegistry* gRegistry;
+
+public:
+  static nsICSSStyleSheet* gUAStyleSheet;
 };
 
 //----------------------------------------------------------------------