[turbofan] Introduce Float64Pow and NumberPow operators.

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index 944f780c04f8ff61153b61d8c5db3e10a2e16048..1340400f886e02d642d7eb89c55fd1445e1599b3 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -555,12 +555,6 @@ Callable CodeFactory::HasProperty(Isolate* isolate) {
 }
 
 // static
-Callable CodeFactory::MathPow(Isolate* isolate) {
-  MathPowStub stub(isolate, MathPowStub::ON_STACK);
-  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
-}
-
-// static
 Callable CodeFactory::InterpreterPushArgsAndCall(Isolate* isolate,
                                                  TailCallMode tail_call_mode) {
   return Callable(