Rename MathNatives_2atan to MathNatives_atan2.

runtime/lib/math.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 <ctype.h>  // isspace.
 
 #include "vm/bootstrap_natives.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/exceptions.h"
@@ skipping 33 matching lines @@
 DEFINE_NATIVE_ENTRY(MathNatives_acos, 1) {
   GET_NATIVE_ARGUMENT(Double, operand, arguments->At(0));
   arguments->SetReturn(Double::Handle(Double::New(acos(operand.value()))));
 }
 
 DEFINE_NATIVE_ENTRY(MathNatives_atan, 1) {
   GET_NATIVE_ARGUMENT(Double, operand, arguments->At(0));
   arguments->SetReturn(Double::Handle(Double::New(atan(operand.value()))));
 }
 
-// It is not possible to call the native MathNatives_atan2. Somehow this leads
-// to a dynamic error "native function 'MathNatives_atan2' cannot be found".
-DEFINE_NATIVE_ENTRY(MathNatives_2atan, 2) {
+DEFINE_NATIVE_ENTRY(MathNatives_atan2, 2) {
   GET_NATIVE_ARGUMENT(Double, operand1, arguments->At(0));
   GET_NATIVE_ARGUMENT(Double, operand2, arguments->At(1));
   arguments->SetReturn(Double::Handle(Double::New(
       atan2(operand1.value(), operand2.value()))));
 }
 
 DEFINE_NATIVE_ENTRY(MathNatives_exp, 1) {
   GET_NATIVE_ARGUMENT(Double, operand, arguments->At(0));
   arguments->SetReturn(Double::Handle(Double::New(exp(operand.value()))));
 }
@@ skipping 108 matching lines @@
       return;
     }
   }
 
   GrowableArray<const Object*> args;
   args.Add(&value);
   Exceptions::ThrowByType(Exceptions::kBadNumberFormat, args);
 }
 
 }  // namespace dart