Introduce processor detection in globals.h, instead of from the build system.

src/virtual-frame.h

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 184 matching lines @@
     ASSERT(is_register());
     data_.reg_ = new_reg;
   }
 
   friend class VirtualFrame;
 };
 
 
 } }  // namespace v8::internal
 
-#ifdef V8_ARCH_ARM
+#if V8_TARGET_ARCH_IA32
+#include "ia32/virtual-frame-ia32.h"
+#elif V8_TARGET_ARCH_X64
+#include "x64/virtual-frame-x64.h"
+#elif V8_TARGET_ARCH_ARM
 #include "arm/virtual-frame-arm.h"
 #endif
 
-#ifdef V8_ARCH_X64
-#include "x64/virtual-frame-x64.h"
-#endif
-
-#ifdef V8_ARCH_IA32
-#include "ia32/virtual-frame-ia32.h"
-#endif
-
 #endif  // V8_VIRTUAL_FRAME_H_