Unbreak MIPS part a bit.

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index b5eb128e27c9c0df240c8edcab5666eeaa168751..b7ba1fb3e753cacf4991c8480a41e4cc5b29406c 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -1099,6 +1099,11 @@ LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoRor(HRor* instr) {
+  return DoShift(Token::ROR, instr);
+}
+
+
 LInstruction* LChunkBuilder::DoShr(HShr* instr) {
   return DoShift(Token::SHR, instr);
 }