Revert "Fix inconsistencies wrt whitespaces."

test/cctest/test-regexp.cc

Index: test/cctest/test-regexp.cc
diff --git a/test/cctest/test-regexp.cc b/test/cctest/test-regexp.cc
index 78cc88e82dca4761203d0e2a78abc1f76a317a17..d0193520fae9a5e225ff7d1379b4fcf61653df08 100644
--- a/test/cctest/test-regexp.cc
+++ b/test/cctest/test-regexp.cc
@@ -445,7 +445,21 @@ static bool NotDigit(uc16 c) {
 
 
 static bool IsWhiteSpace(uc16 c) {
-  return v8::internal::WhiteSpace::Is(c);
+  switch (c) {
+    case 0x09:
+    case 0x0A:
+    case 0x0B:
+    case 0x0C:
+    case 0x0d:
+    case 0x20:
+    case 0xA0:
+    case 0x2028:
+    case 0x2029:
+    case 0xFEFF:
+      return true;
+    default:
+      return unibrow::Space::Is(c);
+  }
 }