Change IllegalArgumentException to ArgumentError.

lib/math/base.dart

Index: lib/math/base.dart
diff --git a/lib/math/base.dart b/lib/math/base.dart
index b4b93d1e160e983400db76a61ec7c7c8a73691b5..72caa21e45431bf6d2a6505a93ea64bfc36c2721 100644
--- a/lib/math/base.dart
+++ b/lib/math/base.dart
@@ -85,9 +85,9 @@ num min(num a, num b) {
       }
       return a;
     }
-    throw new IllegalArgumentException(b);
+    throw new ArgumentError(b);
   }
-  throw new IllegalArgumentException(a);
+  throw new ArgumentError(a);
 }
 
 /**
@@ -124,9 +124,9 @@ num max(num a, num b) {
       if (b == 0 && a.isNegative()) return b;
       return a;
     }
-    throw new IllegalArgumentException(b);
+    throw new ArgumentError(b);
   }
-  throw new IllegalArgumentException(a);
+  throw new ArgumentError(a);
 }
 
 /**