[builtins] Introduce proper Float64Tan operator.

src/compiler/raw-machine-assembler.h

Index: src/compiler/raw-machine-assembler.h
diff --git a/src/compiler/raw-machine-assembler.h b/src/compiler/raw-machine-assembler.h
index 5ef89172a4d2122721d764bf441783a31909c758..387e9619f551ccaa8379aadf16e91e50d1caaf31 100644
--- a/src/compiler/raw-machine-assembler.h
+++ b/src/compiler/raw-machine-assembler.h
@@ -475,6 +475,7 @@ class RawMachineAssembler {
   Node* Float64Log2(Node* a) { return AddNode(machine()->Float64Log2(), a); }
   Node* Float64Sin(Node* a) { return AddNode(machine()->Float64Sin(), a); }
   Node* Float64Sqrt(Node* a) { return AddNode(machine()->Float64Sqrt(), a); }
+  Node* Float64Tan(Node* a) { return AddNode(machine()->Float64Tan(), a); }
   Node* Float64Equal(Node* a, Node* b) {
     return AddNode(machine()->Float64Equal(), a, b);
   }