[builtins] Introduce proper Float64Cos and Float64Sin.

src/external-reference-table.cc

Index: src/external-reference-table.cc
diff --git a/src/external-reference-table.cc b/src/external-reference-table.cc
index b3635d91aac8dcb112c1d382c94f1e0e4ca16f08..ae8bf7c5e9e33146c7f30b0e7de7d50b48d6b3b0 100644
--- a/src/external-reference-table.cc
+++ b/src/external-reference-table.cc
@@ -73,6 +73,8 @@ ExternalReferenceTable::ExternalReferenceTable(Isolate* isolate) {
       "base::ieee754::atan2");
   Add(ExternalReference::ieee754_atanh_function(isolate).address(),
       "base::ieee754::atanh");
+  Add(ExternalReference::ieee754_cos_function(isolate).address(),
+      "base::ieee754::cos");
   Add(ExternalReference::ieee754_exp_function(isolate).address(),
       "base::ieee754::exp");
   Add(ExternalReference::ieee754_expm1_function(isolate).address(),
@@ -87,6 +89,8 @@ ExternalReferenceTable::ExternalReferenceTable(Isolate* isolate) {
       "base::ieee754::log10");
   Add(ExternalReference::ieee754_cbrt_function(isolate).address(),
       "base::ieee754::cbrt");
+  Add(ExternalReference::ieee754_sin_function(isolate).address(),
+      "base::ieee754::sin");
   Add(ExternalReference::store_buffer_top(isolate).address(),
       "store_buffer_top");
   Add(ExternalReference::address_of_the_hole_nan().address(), "the_hole_nan");