Replace math.h with cmath

src/ast.cc

Index: src/ast.cc
diff --git a/src/ast.cc b/src/ast.cc
index e8b065c4ea10b3615c43b0e0acf9badfa716822a..d6af89b38c0fd2342a267752bab58ecc9877c0da 100644
--- a/src/ast.cc
+++ b/src/ast.cc
@@ -27,7 +27,7 @@
 
 #include "ast.h"
 
-#include <math.h>  // For isfinite.
+#include <cmath>  // For isfinite.
 #include "builtins.h"
 #include "code-stubs.h"
 #include "conversions.h"
@@ -241,8 +241,8 @@ bool IsEqualNumber(void* first, void* second) {
   if (h2->IsSmi()) return false;
   Handle<HeapNumber> n1 = Handle<HeapNumber>::cast(h1);
   Handle<HeapNumber> n2 = Handle<HeapNumber>::cast(h2);
-  ASSERT(isfinite(n1->value()));
-  ASSERT(isfinite(n2->value()));
+  ASSERT(std::isfinite(n1->value()));
+  ASSERT(std::isfinite(n2->value()));
   return n1->value() == n2->value();
 }