Unbreak MIPS part a bit.

src/mips/codegen-mips.cc

 // Copyright 2012 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 430 matching lines @@
   __ jmp(&done);
   __ bind(&ascii);
   // Ascii string.
   __ Addu(at, string, index);
   __ lbu(result, MemOperand(at));
   __ bind(&done);
 }
 
 #undef __
 
+
+byte* Code::FindPlatformCodeAgeSequence() {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+bool Code::IsYoungSequence(byte* sequence) {
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+void Code::GetCodeAgeAndParity(byte* sequence, Age* age,
+                               MarkingParity* parity) {
+}
+
+
+void Code::PatchPlatformCodeAge(byte* sequence,
+                                Code::Age age,
+                                MarkingParity parity) {
+  UNIMPLEMENTED();
+}
+
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS