Cosmetic changes ("set up" is a verb, "setup" is a noun).

src/cpu.h

Index: src/cpu.h
===================================================================
--- src/cpu.h	(revision 10367)
+++ src/cpu.h	(working copy)
@@ -53,7 +53,7 @@
 class CPU : public AllStatic {
  public:
   // Initializes the cpu architecture support. Called once at VM startup.
-  static void Setup();
+  static void SetUp();
 
   static bool SupportsCrankshaft();