Add a function to escape a query part of url

net/base/url_util_unittest.cc

Index: net/base/url_util_unittest.cc
diff --git a/net/base/url_util_unittest.cc b/net/base/url_util_unittest.cc
index 158e2740306e29bcdcfd1ab53b6d5cfcbd39af43..1576464eb0b3538eb8eaf5e1d62c427335ef0215 100644
--- a/net/base/url_util_unittest.cc
+++ b/net/base/url_util_unittest.cc
@@ -159,5 +159,26 @@ TEST(UrlUtilTest, ParseQueryInvalidURL) {
   EXPECT_TRUE(it.IsAtEnd());
 }
 
+TEST(UrlUtilTest, EscapeQueryPart) {
+  EXPECT_EQ("http://example.com/test?q=a%7Cb%7Cc",
+            EscapeQueryParameters(GURL("http://example.com/test?q=a%7Cb%7Cc"))
+                .spec());
+
+  EXPECT_EQ(
+      "http://example.com/test?q=a%7Cb%7Cc",
+      EscapeQueryParameters(GURL("http://example.com/test?q=a|b|c")).spec());
+
+  EXPECT_EQ("http://example.com/test?q=a%7Cb%7Cc&q=1%7C2%7C3",
+            EscapeQueryParameters(
+                GURL("http://example.com/test?q=a|b|c&q=1|2|3")).spec());
+
+  EXPECT_EQ("http://example.com/test?q=a%7Cb%7Cc&q2=1%7C2%7C3",
+            EscapeQueryParameters(
+                GURL("http://example.com/test?q=a|b|c&q2=1|2|3")).spec());
+
+  EXPECT_EQ("http://example.com/",
+            EscapeQueryParameters(GURL("http://example.com/")).spec());
+}
+
 }  // namespace
 }  // namespace net