remove the FINAL macro

base/compiler_specific.h

Index: base/compiler_specific.h
diff --git a/base/compiler_specific.h b/base/compiler_specific.h
index a93d350aae0999964bf29c30b58469a728aa2ac9..ba57cc38cdc2ef87dfe0697f25a950bcbec4dc0e 100644
--- a/base/compiler_specific.h
+++ b/base/compiler_specific.h
@@ -139,13 +139,6 @@
 //   virtual void foo() OVERRIDE;
 #define OVERRIDE override
 
-// Annotate a virtual method indicating that subclasses must not override it,
-// or annotate a class to indicate that it cannot be subclassed.
-// Use like:
-//   virtual void foo() FINAL;
-//   class B FINAL : public A {};
-#define FINAL final
-
 // Annotate a function indicating the caller must examine the return value.
 // Use like:
 //   int foo() WARN_UNUSED_RESULT;