Fixes Android build by using C++ math header instead of C one.

runtime/lib/double.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-#include <math.h>
+#include <cmath>
 
 #include "vm/bootstrap_natives.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/code_generator.h"  // DartModulo.
 #include "vm/double_conversion.h"
 #include "vm/exceptions.h"
 #include "vm/native_entry.h"
 #include "vm/object.h"
 #include "vm/symbols.h"
@@ skipping 50 matching lines @@
   GET_NON_NULL_NATIVE_ARGUMENT(Double, right_object, arguments->NativeArgAt(1));
   double right = right_object.value();
   if (FLAG_trace_intrinsified_natives) {
     OS::Print("Double_div %f / %f\n", left, right);
   }
   return Double::New(left / right);
 }
 
 
 static RawInteger* DoubleToInteger(double val, const char* error_msg) {
-  if (isinf(val) || isnan(val)) {
+  if (std::isinf(val) || std::isnan(val)) {
     const Array& args = Array::Handle(Array::New(1));
     args.SetAt(0, String::Handle(String::New(error_msg)));
     Exceptions::ThrowByType(Exceptions::kUnsupported, args);
   }
   const Bigint& big = Bigint::Handle(BigintOperations::NewFromDouble(val));
   return big.AsValidInteger();
 }
 
 
 DEFINE_NATIVE_ENTRY(Double_trunc_div, 2) {
@@ skipping 164 matching lines @@
   } else {
     Exceptions::ThrowArgumentError(String::Handle(
         String::New("Illegal arguments to double.toStringAsPrecision")));
     return Object::null();
   }
 }
 
 
 DEFINE_NATIVE_ENTRY(Double_getIsInfinite, 1) {
   const Double& arg = Double::CheckedHandle(arguments->NativeArgAt(0));
-  return Bool::Get(isinf(arg.value())).raw();
+  return Bool::Get(std::isinf(arg.value())).raw();
 }
 
 
 DEFINE_NATIVE_ENTRY(Double_getIsNaN, 1) {
   const Double& arg = Double::CheckedHandle(arguments->NativeArgAt(0));
-  return Bool::Get(isnan(arg.value())).raw();
+  return Bool::Get(std::isnan(arg.value())).raw();
 }
 
 
 DEFINE_NATIVE_ENTRY(Double_getIsNegative, 1) {
   const Double& arg = Double::CheckedHandle(arguments->NativeArgAt(0));
   // Include negative zero, infinity.
   double dval = arg.value();
-  return Bool::Get(signbit(dval) && !isnan(dval)).raw();
+  return Bool::Get(std::signbit(dval) && !std::isnan(dval)).raw();
 }
 
 // Add here only functions using/referring to old-style casts.
 
 }  // namespace dart