Desugar bitwise negation into XOR and kill all UnaryOp stuff.

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index 0dd8ec4685b2e606c905d7e8f9bc112bb1398f40..8a03a9a31a592faa84ce21f1e77625e5481719ea 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -247,17 +247,6 @@ void InternalArrayNArgumentsConstructorStub::InitializeInterfaceDescriptor(
 }
 
 
-void UnaryOpStub::InitializeInterfaceDescriptor(
-    Isolate* isolate,
-    CodeStubInterfaceDescriptor* descriptor) {
-  static Register registers[] = { a0 };
-  descriptor->register_param_count_ = 1;
-  descriptor->register_params_ = registers;
-  descriptor->deoptimization_handler_ =
-      FUNCTION_ADDR(UnaryOpIC_Miss);
-}
-
-
 void StoreGlobalStub::InitializeInterfaceDescriptor(
     Isolate* isolate,
     CodeStubInterfaceDescriptor* descriptor) {