Reapply "Port regexp tests from V8 to Dart."

tests/corelib/regexp/regress-regexp-construct-result_test.dart

Index: tests/corelib/regexp/regress-regexp-construct-result_test.dart
diff --git a/runtime/third_party/double-conversion/src/strtod.h b/tests/corelib/regexp/regress-regexp-construct-result_test.dart
similarity index 65%
copy from runtime/third_party/double-conversion/src/strtod.h
copy to tests/corelib/regexp/regress-regexp-construct-result_test.dart
index ed0293b8f54a373762f17fe4dd70f2896eb1d193..ac9c032073bfc95f22bcc19a4424a7a2118130a2 100644
--- a/runtime/third_party/double-conversion/src/strtod.h
+++ b/tests/corelib/regexp/regress-regexp-construct-result_test.dart
@@ -1,4 +1,5 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright (c) 2014, the Dart project authors. All rights reserved.
+// Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -25,21 +26,25 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef DOUBLE_CONVERSION_STRTOD_H_
-#define DOUBLE_CONVERSION_STRTOD_H_
+import 'v8_regexp_utils.dart';
+import 'package:expect/expect.dart';
 
-#include "utils.h"
+void main() {
+  // Create a huge regexp with many alternative capture groups, most of
+  // which do not capture anything, but the corresponding capture slot
+  // in the result object has to exist, even though filled with null.
+  // Having a large result array helps stressing GC.
 
-namespace double_conversion {
+  var num_captures = 1000;
+  var regexp_string = "(a)";
+  for (var i = 0; i < num_captures - 1; i++) {
+    regexp_string += "|(b)";
+  }
+  var regexp = new RegExp(regexp_string);
 
-// The buffer must only contain digits in the range [0-9]. It must not
-// contain a dot or a sign. It must not start with '0', and must not be empty.
-double Strtod(Vector<const char> buffer, int exponent);
-
-// The buffer must only contain digits in the range [0-9]. It must not
-// contain a dot or a sign. It must not start with '0', and must not be empty.
-float Strtof(Vector<const char> buffer, int exponent);
-
-}  // namespace double_conversion
-
-#endif  // DOUBLE_CONVERSION_STRTOD_H_
+  for (var i = 0; i < 10; i++) {
+    var matches = regexp.firstMatch("a");
+    var count = 0;
+    assertEquals(num_captures + 1, matches.groupCount + 1);
+  }
+}