Update fetch / loader classes to use OVERRIDE / FINAL when needed

Source/core/fetch/ScriptResource.h

Index: Source/core/fetch/ScriptResource.h
diff --git a/Source/core/fetch/ScriptResource.h b/Source/core/fetch/ScriptResource.h
index 09502e3eddf8b2abd30cb567b0eadc824a257709..28f62253b34a438003de23c482838c64bc8b8d15 100644
--- a/Source/core/fetch/ScriptResource.h
+++ b/Source/core/fetch/ScriptResource.h
@@ -33,7 +33,7 @@ namespace WebCore {
 class ResourceFetcher;
 class TextResourceDecoder;
 
-class ScriptResource : public Resource {
+class ScriptResource FINAL : public Resource {
 public:
     typedef ResourceClient ClientType;
 
@@ -42,8 +42,8 @@ public:
 
     const String& script();
 
-    virtual void setEncoding(const String&);
-    virtual String encoding() const;
+    virtual void setEncoding(const String&) OVERRIDE;
+    virtual String encoding() const OVERRIDE;
     AtomicString mimeType() const;
 
     bool mimeTypeAllowedByNosniff() const;