[stubs] Port LoadFunctionPrototypeStub to CSA

src/ic/ia32/handler-compiler-ia32.cc

Index: src/ic/ia32/handler-compiler-ia32.cc
diff --git a/src/ic/ia32/handler-compiler-ia32.cc b/src/ic/ia32/handler-compiler-ia32.cc
index c5c6437766e7da0da0fa7474f02e3459312b1295..f0f8fadddea939d3afa957ee73f3c433af660a9c 100644
--- a/src/ic/ia32/handler-compiler-ia32.cc
+++ b/src/ic/ia32/handler-compiler-ia32.cc
@@ -122,15 +122,6 @@ void PropertyHandlerCompiler::GenerateDictionaryNegativeLookup(
   __ DecrementCounter(counters->negative_lookups_miss(), 1);
 }
 
-void NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(
-    MacroAssembler* masm, Register receiver, Register scratch1,
-    Register scratch2, Label* miss_label) {
-  // TODO(mvstanton): This isn't used on ia32. Move all the other
-  // platform implementations into a code stub so this method can be removed.
-  UNREACHABLE();
-}
-
-
 // Generate call to api function.
 // This function uses push() to generate smaller, faster code than
 // the version above. It is an optimization that should will be removed