Do not sanitize about:blank/#foo & about:blank?foo

url/url_util_unittest.cc

Index: url/url_util_unittest.cc
diff --git a/url/url_util_unittest.cc b/url/url_util_unittest.cc
index a706f5a08a04bbfeca8a9cf936ad4bee664a079f..a3b61fff8a6ae17b31f2bfa81e74ef504920bc6d 100644
--- a/url/url_util_unittest.cc
+++ b/url/url_util_unittest.cc
@@ -6,6 +6,7 @@
 
 #include "base/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
 #include "url/third_party/mozilla/url_parse.h"
 #include "url/url_canon.h"
 #include "url/url_canon_stdstring.h"
@@ -417,4 +418,19 @@ TEST(URLUtilTest, TestDomainIs) {
   }
 }
 
+TEST(URLUtilTest, IsAboutBlank) {
+  const std::string kAboutBlankUrls[] = {"about:blank", "about:blank?foo",
+                                         "about:blank/#foo",
+                                         "about:blank?foo#foo"};
+  for (const auto& url : kAboutBlankUrls)
+    EXPECT_TRUE(IsAboutBlank(GURL(url)));
+
+  const std::string kNotAboutBlankUrls[] = {
+      "http:blank",      "about:blan",          "about://blank",
+      "about:blank/foo", "about://:8000/blank", "about://foo:foo@/blank",
+      "foo@about:blank", "foo:bar@about:blank", "about:blank:8000"};
+  for (const auto& url : kNotAboutBlankUrls)
+    EXPECT_FALSE(IsAboutBlank(GURL(url)));
+}
+
 }  // namespace url