Update web classes to use OVERRIDE / FINAL when needed

Source/web/SpellCheckerClientImpl.h

Index: Source/web/SpellCheckerClientImpl.h
diff --git a/Source/web/SpellCheckerClientImpl.h b/Source/web/SpellCheckerClientImpl.h
index c03d8cfd8f4f45347d182034d9743530cd30f58f..53243d55163a3c24233d040df769cc91670bddbf 100644
--- a/Source/web/SpellCheckerClientImpl.h
+++ b/Source/web/SpellCheckerClientImpl.h
@@ -42,7 +42,7 @@ class HTMLInputElement;
 namespace blink {
 class WebViewImpl;
 
-class SpellCheckerClientImpl : public WebCore::SpellCheckerClient, public WebCore::TextCheckerClient {
+class SpellCheckerClientImpl FINAL : public WebCore::SpellCheckerClient, public WebCore::TextCheckerClient {
 public:
     SpellCheckerClientImpl(WebViewImpl*);
 
@@ -61,7 +61,7 @@ public:
     virtual bool spellingUIIsShowing() OVERRIDE;
     virtual void requestCheckingOfString(WTF::PassRefPtr<WebCore::TextCheckingRequest>) OVERRIDE;
 
-    virtual WebCore::TextCheckerClient& textChecker() { return *this; }
+    virtual WebCore::TextCheckerClient& textChecker() OVERRIDE { return *this; }
 
 private:
     // Returns whether or not the focused control needs spell-checking.