[turbofan] Cleanup use of virtual, OVERRIDE, FINAL.

src/compiler/gap-resolver.h

Index: src/compiler/gap-resolver.h
diff --git a/src/compiler/gap-resolver.h b/src/compiler/gap-resolver.h
index 98aaab2b487ac7fb180fff8c9dcaf6c2c4732267..4f4f4e4f31cb31aa6209073f6ea9504d0f95732c 100644
--- a/src/compiler/gap-resolver.h
+++ b/src/compiler/gap-resolver.h
@@ -39,8 +39,9 @@ class GapResolver FINAL {
   // Assembler used to emit moves and save registers.
   Assembler* const assembler_;
 };
-}
-}
-}  // namespace v8::internal::compiler
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_COMPILER_GAP_RESOLVER_H_