Turn StoreIC::Megamorphic into a builtin, get rid of the non-monomorphic-cache

src/ic/mips/ic-mips.cc

Index: src/ic/mips/ic-mips.cc
diff --git a/src/ic/mips/ic-mips.cc b/src/ic/mips/ic-mips.cc
index 20a42821b2414b1bb0b57fff2f16336a65d02b0d..389fa57dbcabfd28bfb2d6e7ff4a8fdcfc221232 100644
--- a/src/ic/mips/ic-mips.cc
+++ b/src/ic/mips/ic-mips.cc
@@ -740,7 +740,7 @@ void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
   Code::Flags flags =
       Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::STORE_IC));
   masm->isolate()->stub_cache()->GenerateProbe(masm, Code::STORE_IC, flags,
-                                               receiver, name, a3, t0, t1, t2);
+                                               receiver, name, t1, t2, t3, t4);
 
   // Cache miss: Jump to runtime.
   GenerateMiss(masm);