Add a function to escape a query part of url

net/base/escape.h

Index: net/base/escape.h
diff --git a/net/base/escape.h b/net/base/escape.h
index 1915d24418883a2186ffc329733a93bc43938085..444f4336e9ecc9a3dfdc955fe8eafc6009b74010 100644
--- a/net/base/escape.h
+++ b/net/base/escape.h
@@ -54,6 +54,11 @@ NET_EXPORT void AppendEscapedCharForHTML(char c, std::string* output);
 NET_EXPORT std::string EscapeForHTML(const std::string& text);
 NET_EXPORT base::string16 EscapeForHTML(const base::string16& text);
 
+// Escapes characters in text suitable for use as a query part.
+// We %XX everything except alphanumerics, the restricted chracters(;/?:@&=+$,),
+// the mark characters(-_.!~*'()).

[asanka, 2014/10/10 20:59:16]

You are once again going to be bitten by
https://url.spec.whatwg.org/#query-state which follows a slightly different
algorithm that doesn't require escaping '|'.

+NET_EXPORT std::string EscapeQueryPart(const std::string& text);
+
 // Unescaping ------------------------------------------------------------------
 
 class UnescapeRule {