Fix issue 4456 (BadNumberFormatException -> FormatException).

lib/compiler/implementation/lib/math.dartp

Index: lib/compiler/implementation/lib/math.dartp
diff --git a/lib/compiler/implementation/lib/math.dartp b/lib/compiler/implementation/lib/math.dartp
index 66000c89dca3cf0f75c2dac9bf937e0b88296dec..f6be1d835987afaff8407bf0fed4dd563035889a 100644
--- a/lib/compiler/implementation/lib/math.dartp
+++ b/lib/compiler/implementation/lib/math.dartp
@@ -16,7 +16,7 @@ patch int parseInt(str) {
   if (!JS('bool',
           @'/^\s*[+-]?(?:0[xX][abcdefABCDEF0-9]+|\d+)\s*$/.test(#)',
           str)) {
-    throw new BadNumberFormatException(str);
+    throw new FormatException(str);
   }
   var trimmed = str.trim();
   var base = 10;
@@ -25,7 +25,7 @@ patch int parseInt(str) {
     base = 16;
   }
   var ret = JS('num', @'parseInt(#, #)', trimmed, base);
-  if (ret.isNaN()) throw new BadNumberFormatException(str);
+  if (ret.isNaN()) throw new FormatException(str);
   return ret;
 }
 
@@ -37,7 +37,7 @@ patch double parseDouble(String str) {
     ret = JS('num', @'parseInt(#)', str);
   }
   if (ret.isNaN() && str != 'NaN' && str != '-NaN') {
-    throw new BadNumberFormatException(str);
+    throw new FormatException(str);
   }
   return ret;
 }