Replacing the OVERRIDE with override and FINAL with final

Source/platform/WebThreadSupportingGC.h

Index: Source/platform/WebThreadSupportingGC.h
diff --git a/Source/platform/WebThreadSupportingGC.h b/Source/platform/WebThreadSupportingGC.h
index c793e06cfff27fb10c1aa92df84bcea13172b2a1..3c58d6de9aaab31763879d2a9acf7aa7586c6f03 100644
--- a/Source/platform/WebThreadSupportingGC.h
+++ b/Source/platform/WebThreadSupportingGC.h
@@ -21,7 +21,7 @@ namespace blink {
 // thread allocates any objects managed by the Blink GC. The detach GC
 // method must be called on the WebThread during shutdown when the thread
 // no longer needs to access objects managed by the Blink GC.
-class PLATFORM_EXPORT WebThreadSupportingGC FINAL {
+class PLATFORM_EXPORT WebThreadSupportingGC final {
     WTF_MAKE_NONCOPYABLE(WebThreadSupportingGC);
 public:
     static PassOwnPtr<WebThreadSupportingGC> create(const char*);