Enable isolate tests with leg and legium.

frog/leg/lib/uri_toremove.dart

Index: frog/leg/lib/uri_toremove.dart
===================================================================
--- frog/leg/lib/uri_toremove.dart	(revision 5351)
+++ frog/leg/lib/uri_toremove.dart	(working copy)
@@ -8,6 +8,7 @@
  * A parsed URI, inspired by:
  * http://closure-library.googlecode.com/svn/docs/class_goog_Uri.html
  */
+// TODO(ngeoffray): Remove this file once Leg support compile-time constants.
 class Uri {
   final String scheme;
   final String userInfo;
@@ -43,25 +44,31 @@
   }
 
   // NOTE: This code was ported from: closure-library/closure/goog/uri/utils.js
-  static final RegExp _splitRe = const RegExp(
-      '^' +
-      '(?:' +
-        '([^:/?#.]+)' +                 // scheme - ignore special characters
-                                        // used by other URL parts such as :,
-                                        // ?, /, #, and .
-      ':)?' +
-      '(?://' +
-        '(?:([^/?#]*)@)?' +             // userInfo
-        '([\\w\\d\\-\\u0100-\\uffff.%]*)' +
-                                        // domain - restrict to letters,
-                                        // digits, dashes, dots, percent
-                                        // escapes, and unicode characters.
-        '(?::([0-9]+))?' +              // port
-      ')?' +
-      '([^?#]+)?' +                     // path
-      '(?:\\?([^#]*))?' +               // query
-      '(?:#(.*))?' +                    // fragment
-      '\$');
+  static RegExp _regexp;
+  static RegExp get _splitRe() {
+    if (_regexp == null) {
+      _regexp = new RegExp(
+        '^' +
+        '(?:' +
+          '([^:/?#.]+)' +                 // scheme - ignore special characters
+                                          // used by other URL parts such as :,
+                                          // ?, /, #, and .
+        ':)?' +
+        '(?://' +
+          '(?:([^/?#]*)@)?' +             // userInfo
+          '([\\w\\d\\-\\u0100-\\uffff.%]*)' +
+                                          // domain - restrict to letters,
+                                          // digits, dashes, dots, percent
+                                          // escapes, and unicode characters.
+          '(?::([0-9]+))?' +              // port
+        ')?' +
+        '([^?#]+)?' +                     // path
+        '(?:\\?([^#]*))?' +               // query
+        '(?:#(.*))?' +                    // fragment
+        '\$');
+    }
+    return _regexp;
+  }
 
   static final _COMPONENT_SCHEME = 1;
   static final _COMPONENT_USER_INFO = 2;