[builtins] Introduce proper Float64Cos and Float64Sin.

src/compiler/js-builtin-reducer.h

Index: src/compiler/js-builtin-reducer.h
diff --git a/src/compiler/js-builtin-reducer.h b/src/compiler/js-builtin-reducer.h
index 10d85f176a5c8f27b5c342111f3fd805d513bbb1..2859ada01184eaa5849bdcac3e08dc771dd093bc 100644
--- a/src/compiler/js-builtin-reducer.h
+++ b/src/compiler/js-builtin-reducer.h
@@ -34,19 +34,21 @@ class JSBuiltinReducer final : public AdvancedReducer {
   Reduction ReduceMathAtanh(Node* node);
   Reduction ReduceMathCeil(Node* node);
   Reduction ReduceMathClz32(Node* node);
+  Reduction ReduceMathCos(Node* node);
   Reduction ReduceMathExp(Node* node);
   Reduction ReduceMathFloor(Node* node);
   Reduction ReduceMathFround(Node* node);
   Reduction ReduceMathImul(Node* node);
   Reduction ReduceMathLog(Node* node);
   Reduction ReduceMathLog1p(Node* node);
-  Reduction ReduceMathLog2(Node* node);
   Reduction ReduceMathLog10(Node* node);
+  Reduction ReduceMathLog2(Node* node);
   Reduction ReduceMathMax(Node* node);
   Reduction ReduceMathMin(Node* node);
   Reduction ReduceMathCbrt(Node* node);
   Reduction ReduceMathExpm1(Node* node);
   Reduction ReduceMathRound(Node* node);
+  Reduction ReduceMathSin(Node* node);
   Reduction ReduceMathSqrt(Node* node);
   Reduction ReduceMathTrunc(Node* node);
   Reduction ReduceStringFromCharCode(Node* node);