Correctify instanceof and make it optimizable.

src/mips64/interface-descriptors-mips64.cc

Index: src/mips64/interface-descriptors-mips64.cc
diff --git a/src/mips64/interface-descriptors-mips64.cc b/src/mips64/interface-descriptors-mips64.cc
index 4a87295e94ab5ef02e0b164d4e6e9d954e84a67f..610275f4149a0617b83644961942de048c7f974b 100644
--- a/src/mips64/interface-descriptors-mips64.cc
+++ b/src/mips64/interface-descriptors-mips64.cc
@@ -46,8 +46,8 @@ const Register StoreGlobalViaContextDescriptor::SlotRegister() { return a2; }
 const Register StoreGlobalViaContextDescriptor::ValueRegister() { return a0; }
 
 
-const Register InstanceofDescriptor::left() { return a0; }
-const Register InstanceofDescriptor::right() { return a1; }
+const Register InstanceOfDescriptor::LeftRegister() { return a1; }
+const Register InstanceOfDescriptor::RightRegister() { return a0; }
 
 
 const Register ArgumentsAccessReadDescriptor::index() { return a1; }