Unbreak MIPS part a bit.

src/mips/codegen-mips.cc

Index: src/mips/codegen-mips.cc
diff --git a/src/mips/codegen-mips.cc b/src/mips/codegen-mips.cc
index 44e0359e4445a3fe5d7dadbe3dda75859ad48f3d..412dbc54ee346f2ed25d462db2b0cf36581080ec 100644
--- a/src/mips/codegen-mips.cc
+++ b/src/mips/codegen-mips.cc
@@ -448,6 +448,30 @@ void StringCharLoadGenerator::Generate(MacroAssembler* masm,
 
 #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