Desugar bitwise negation into XOR and kill all UnaryOp stuff.

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 76479d3e2ebec5dc63fa69a001f818fae339b7fc..ad33a8c6319b7a0a5919b7be75458068a1d1f929 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -246,17 +246,6 @@ void ToBooleanStub::InitializeInterfaceDescriptor(
 }
 
 
-void UnaryOpStub::InitializeInterfaceDescriptor(
-    Isolate* isolate,
-    CodeStubInterfaceDescriptor* descriptor) {
-  static Register registers[] = { rax };
-  descriptor->register_param_count_ = 1;
-  descriptor->register_params_ = registers;
-  descriptor->deoptimization_handler_ =
-     FUNCTION_ADDR(UnaryOpIC_Miss);
-}
-
-
 void StoreGlobalStub::InitializeInterfaceDescriptor(
     Isolate* isolate,
     CodeStubInterfaceDescriptor* descriptor) {