[builtins] Migrate a bunch of Math builtins to C++.

src/runtime/runtime.h

Index: src/runtime/runtime.h
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index c223e13672ad405c7fc7160cf210ffbb7325cf5f..deec51098db097cd05c4f0e3d76e5237af37fbaa 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -369,9 +369,6 @@ namespace internal {
 
 
 #define FOR_EACH_INTRINSIC_MATHS(F) \
-  F(MathAcos, 1, 1)                 \
-  F(MathAsin, 1, 1)                 \
-  F(MathAtan, 1, 1)                 \
   F(MathLogRT, 1, 1)                \
   F(DoubleHi, 1, 1)                 \
   F(DoubleLo, 1, 1)                 \
@@ -385,7 +382,6 @@ namespace internal {
   F(MathPowRT, 2, 1)                \
   F(RoundNumber, 1, 1)              \
   F(MathSqrt, 1, 1)                 \
-  F(MathFround, 1, 1)               \
   F(GenerateRandomNumbers, 1, 1)
 
 
@@ -402,7 +398,6 @@ namespace internal {
   F(NumberToStringSkipCache, 1, 1)     \
   F(NumberToIntegerMapMinusZero, 1, 1) \
   F(NumberToSmi, 1, 1)                 \
-  F(NumberImul, 2, 1)                  \
   F(SmiLexicographicCompare, 2, 1)     \
   F(MaxSmi, 0, 1)                      \
   F(IsSmi, 1, 1)                       \