Add a function to escape a query part of url

net/base/url_util.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_BASE_URL_UTIL_H_
 #define NET_BASE_URL_UTIL_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 59 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(QueryIterator);
 };
 
 // Looks for |search_key| in the query portion of |url|. Returns true if the
 // key is found and sets |out_value| to the unescaped value for the key.
 // Returns false if the key is not found.
 NET_EXPORT bool GetValueForKeyInQuery(const GURL& url,
                                       const std::string& search_key,
                                       std::string* out_value);
 
+// Returns a new GURL which is same to |url| except that unsafe characters in a
+// name and a value of each of query parameters are escaped like %XX%XX.

[Ryan Sleevi, 2014/10/09 21:11:04]

Grammatically, this is not valid.

"Returns a new GURL based on |url|, but with unsafe characters in the name and
value of query parameters of |url| escaped"

(e.g. "same to |url|" doesn't read right)

+//
+// Examples:
+//
+// EscapeQueryParameters(GURL("http://example.com/test?q=a|b|c")).spec()
+// => "http://example.com/test?q=a%7Cb%7Cc"
+// EscapeQueryParameters(GURL("http://example.com/test?q=a|b&q2=1|2")).spec()
+// => "http://example.com/test?q=a%7Cb&q2=1%7C2"
+NET_EXPORT GURL EscapeQueryParameters(const GURL& url);
+
 }  // namespace net
 
 #endif  // NET_BASE_URL_UTIL_H_