[builtins] Introduce proper Float64Cos and Float64Sin.

src/crankshaft/x64/lithium-x64.h

Index: src/crankshaft/x64/lithium-x64.h
diff --git a/src/crankshaft/x64/lithium-x64.h b/src/crankshaft/x64/lithium-x64.h
index 2ee0e4e6f9870eae1ba6afdcf8fdc51bd8a4289d..5388a7b24497be9a3ee3c10b95e119e0900f97ad 100644
--- a/src/crankshaft/x64/lithium-x64.h
+++ b/src/crankshaft/x64/lithium-x64.h
@@ -98,6 +98,7 @@ class LCodeGen;
   V(LoadNamedGeneric)                        \
   V(MathAbs)                                 \
   V(MathClz32)                               \
+  V(MathCos)                                 \
   V(MathExp)                                 \
   V(MathFloorD)                              \
   V(MathFloorI)                              \
@@ -107,6 +108,7 @@ class LCodeGen;
   V(MathPowHalf)                             \
   V(MathRoundD)                              \
   V(MathRoundI)                              \
+  V(MathSin)                                 \
   V(MathSqrt)                                \
   V(MaybeGrowElements)                       \
   V(ModByConstI)                             \
@@ -909,6 +911,15 @@ class LMathClz32 final : public LTemplateInstruction<1, 1, 0> {
   DECLARE_CONCRETE_INSTRUCTION(MathClz32, "math-clz32")
 };
 
+class LMathCos final : public LTemplateInstruction<1, 1, 0> {
+ public:
+  explicit LMathCos(LOperand* value) { inputs_[0] = value; }
+
+  LOperand* value() { return inputs_[0]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(MathCos, "math-cos")
+};
+
 class LMathExp final : public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LMathExp(LOperand* value) { inputs_[0] = value; }
@@ -918,6 +929,14 @@ class LMathExp final : public LTemplateInstruction<1, 1, 0> {
   DECLARE_CONCRETE_INSTRUCTION(MathExp, "math-exp")
 };
 
+class LMathSin final : public LTemplateInstruction<1, 1, 0> {
+ public:
+  explicit LMathSin(LOperand* value) { inputs_[0] = value; }
+
+  LOperand* value() { return inputs_[0]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(MathSin, "math-sin")
+};
 
 class LMathSqrt final : public LTemplateInstruction<1, 1, 0> {
  public:
@@ -2531,8 +2550,10 @@ class LChunkBuilder final : public LChunkBuilderBase {
   LInstruction* DoMathRound(HUnaryMathOperation* instr);
   LInstruction* DoMathFround(HUnaryMathOperation* instr);
   LInstruction* DoMathAbs(HUnaryMathOperation* instr);
+  LInstruction* DoMathCos(HUnaryMathOperation* instr);
   LInstruction* DoMathLog(HUnaryMathOperation* instr);
   LInstruction* DoMathExp(HUnaryMathOperation* instr);
+  LInstruction* DoMathSin(HUnaryMathOperation* instr);
   LInstruction* DoMathSqrt(HUnaryMathOperation* instr);
   LInstruction* DoMathPowHalf(HUnaryMathOperation* instr);
   LInstruction* DoMathClz32(HUnaryMathOperation* instr);