The search terms are escaped using + or %20 for space depending on whether re...

net/base/escape.h

 // Copyright (c) 2009 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_ESCAPE_H__
-#define NET_BASE_ESCAPE_H__
+#ifndef NET_BASE_ESCAPE_H_
+#define NET_BASE_ESCAPE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/string16.h"
 
 // Escaping --------------------------------------------------------------------
 
 // Escape a file.  This includes:
 // non-printable, non-7bit, and (including space)  "#%:<>?[\]^`{|}
@@ skipping 93 matching lines @@
 
 // Escapes characters in text suitable for use as a query parameter value.
 // We %XX everything except alphanumerics and -_.!~*'()
 // Spaces change to "+" unless you pass usePlus=false.
 // This is basically the same as encodeURIComponent in javascript.
 // For the string16 version, we do a conversion to charset before encoding the
 // string.  If the charset doesn't exist, we return false.
 //
 // TODO(brettw) bug 1201094: This function should be removed. See the bug for
 // why and what callers should do instead.
-std::string EscapeQueryParamValue(const std::string& text);
 std::string EscapeQueryParamValue(const std::string& text, bool use_plus);
 bool EscapeQueryParamValue(const string16& text, const char* codepage,
-                           string16* escaped);
+                           bool use_plus, string16* escaped);
 
 // A specialized version of EscapeQueryParamValue for wide strings that
 // assumes the codepage is UTF8.  This is provided as a convenience.
 //
 // TODO(brettw) bug 1201094: This function should be removed. See the bug for
 // why and what callers should do instead.
-std::wstring EscapeQueryParamValueUTF8(const std::wstring& text);
+std::wstring EscapeQueryParamValueUTF8(const std::wstring& text, bool use_plus);
 
-#endif  // #ifndef NET_BASE_ESCAPE_H__
+#endif  // NET_BASE_ESCAPE_H_