Update web classes to use OVERRIDE / FINAL when needed

Source/web/WebDataSourceImpl.h

Index: Source/web/WebDataSourceImpl.h
diff --git a/Source/web/WebDataSourceImpl.h b/Source/web/WebDataSourceImpl.h
index e6db579b103e0926fd349131ee2d95e180199710..0949caee9b185981b60a7d39f897492e5ea0d629 100644
--- a/Source/web/WebDataSourceImpl.h
+++ b/Source/web/WebDataSourceImpl.h
@@ -45,7 +45,7 @@ namespace blink {
 
 class WebPluginLoadObserver;
 
-class WebDataSourceImpl : public WebCore::DocumentLoader, public WebDataSource {
+class WebDataSourceImpl FINAL : public WebCore::DocumentLoader, public WebDataSource {
 public:
     static PassRefPtr<WebDataSourceImpl> create(WebCore::Frame*, const WebCore::ResourceRequest&, const WebCore::SubstituteData&);
 
@@ -55,21 +55,21 @@ public:
     }
 
     // WebDataSource methods:
-    virtual const WebURLRequest& originalRequest() const;
-    virtual const WebURLRequest& request() const;
-    virtual const WebURLResponse& response() const;
-    virtual bool hasUnreachableURL() const;
-    virtual WebURL unreachableURL() const;
-    virtual void appendRedirect(const WebURL&);
-    virtual void redirectChain(WebVector<WebURL>&) const;
-    virtual bool isClientRedirect() const;
-    virtual bool replacesCurrentHistoryItem() const;
-    virtual WebNavigationType navigationType() const;
-    virtual double triggeringEventTime() const;
-    virtual ExtraData* extraData() const;
-    virtual void setExtraData(ExtraData*);
-    virtual WebApplicationCacheHost* applicationCacheHost();
-    virtual void setNavigationStartTime(double);
+    virtual const WebURLRequest& originalRequest() const OVERRIDE;
+    virtual const WebURLRequest& request() const OVERRIDE;
+    virtual const WebURLResponse& response() const OVERRIDE;
+    virtual bool hasUnreachableURL() const OVERRIDE;
+    virtual WebURL unreachableURL() const OVERRIDE;
+    virtual void appendRedirect(const WebURL&) OVERRIDE;
+    virtual void redirectChain(WebVector<WebURL>&) const OVERRIDE;
+    virtual bool isClientRedirect() const OVERRIDE;
+    virtual bool replacesCurrentHistoryItem() const OVERRIDE;
+    virtual WebNavigationType navigationType() const OVERRIDE;
+    virtual double triggeringEventTime() const OVERRIDE;
+    virtual ExtraData* extraData() const OVERRIDE;
+    virtual void setExtraData(ExtraData*) OVERRIDE;
+    virtual WebApplicationCacheHost* applicationCacheHost() OVERRIDE;
+    virtual void setNavigationStartTime(double) OVERRIDE;
 
     static WebNavigationType toWebNavigationType(WebCore::NavigationType type);
 
@@ -78,7 +78,7 @@ public:
 
 private:
     WebDataSourceImpl(WebCore::Frame*, const WebCore::ResourceRequest&, const WebCore::SubstituteData&);
-    ~WebDataSourceImpl();
+    virtual ~WebDataSourceImpl();
 
     // Mutable because the const getters will magically sync these to the
     // latest version from WebKit.