Untangle some #include dependencies....

src/jsregexp.cc

 // Copyright 2006-2009 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 27 matching lines @@
 #include "compilation-cache.h"
 #include "string-stream.h"
 #include "parser.h"
 #include "regexp-macro-assembler.h"
 #include "regexp-macro-assembler-tracer.h"
 #include "regexp-macro-assembler-irregexp.h"
 #include "regexp-stack.h"
 
 #ifdef V8_NATIVE_REGEXP
 #if V8_TARGET_ARCH_IA32
-#include "ia32/macro-assembler-ia32.h"
 #include "ia32/regexp-macro-assembler-ia32.h"
 #elif V8_TARGET_ARCH_X64
-#include "x64/macro-assembler-x64.h"
 #include "x64/regexp-macro-assembler-x64.h"
 #elif V8_TARGET_ARCH_ARM
-#include "arm/macro-assembler-arm.h"
 #include "arm/regexp-macro-assembler-arm.h"
 #else
 #error Unsupported target architecture.
 #endif
 #endif
 
 #include "interpreter-irregexp.h"
 
 
 namespace v8 {
@@ skipping 4421 matching lines @@
   RegExpMacroAssemblerIrregexp macro_assembler(codes);
 #endif
 
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
 }
 
 }}  // namespace v8::internal