Enable preaging of code objects when --optimize-for-size.

src/arm/assembler-arm-inl.h

Index: src/arm/assembler-arm-inl.h
diff --git a/src/arm/assembler-arm-inl.h b/src/arm/assembler-arm-inl.h
index a1d1e1b5670b57bc77a063c588748dd632dcb492..e3b39f407cb37a31d60e79cb5470a383cacad223 100644
--- a/src/arm/assembler-arm-inl.h
+++ b/src/arm/assembler-arm-inl.h
@@ -208,6 +208,13 @@ void RelocInfo::set_target_cell(Cell* cell, WriteBarrierMode mode) {
 
 static const int kNoCodeAgeSequenceLength = 3;
 
+
+Handle<Object> RelocInfo::code_age_stub_handle(Assembler* origin) {
+  UNREACHABLE();  // This should never be reached on Arm.
+  return Handle<Object>();
+}
+
+
 Code* RelocInfo::code_age_stub() {
   ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
   return Code::GetCodeFromTargetAddress(