[builtins] Introduce proper Float64Cos and Float64Sin.

src/crankshaft/arm/lithium-arm.cc

Index: src/crankshaft/arm/lithium-arm.cc
diff --git a/src/crankshaft/arm/lithium-arm.cc b/src/crankshaft/arm/lithium-arm.cc
index f0f9327a5083f679acc01a76546ccbc901d1d96b..03b05de98683ae70d05ae32cbe513f7470994dad 100644
--- a/src/crankshaft/arm/lithium-arm.cc
+++ b/src/crankshaft/arm/lithium-arm.cc
@@ -1069,6 +1069,10 @@ LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
       return DoMathAbs(instr);
     case kMathLog:
       return DoMathLog(instr);
+    case kMathCos:
+      return DoMathCos(instr);
+    case kMathSin:
+      return DoMathSin(instr);
     case kMathExp:
       return DoMathExp(instr);
     case kMathSqrt:
@@ -1134,6 +1138,19 @@ LInstruction* LChunkBuilder::DoMathClz32(HUnaryMathOperation* instr) {
   return DefineAsRegister(result);
 }
 
+LInstruction* LChunkBuilder::DoMathCos(HUnaryMathOperation* instr) {
+  DCHECK(instr->representation().IsDouble());
+  DCHECK(instr->value()->representation().IsDouble());
+  LOperand* input = UseFixedDouble(instr->value(), d0);
+  return MarkAsCall(DefineFixedDouble(new (zone()) LMathCos(input), d0), instr);
+}
+
+LInstruction* LChunkBuilder::DoMathSin(HUnaryMathOperation* instr) {
+  DCHECK(instr->representation().IsDouble());
+  DCHECK(instr->value()->representation().IsDouble());
+  LOperand* input = UseFixedDouble(instr->value(), d0);
+  return MarkAsCall(DefineFixedDouble(new (zone()) LMathSin(input), d0), instr);
+}
 
 LInstruction* LChunkBuilder::DoMathExp(HUnaryMathOperation* instr) {
   DCHECK(instr->representation().IsDouble());