Allow explicitly whitelisted apps/extensions in public sessions

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"
 #include "net/base/net_export.h"
+#include "url/url_parse.h"
 
 class GURL;
 
 namespace net {
 
 // Returns a new GURL by appending the given query parameter name and the
 // value. Unsafe characters in the name and the value are escaped like
 // %XX%XX. The original query component is preserved if it's present.
 //
 // Examples:
@@ skipping 16 matching lines @@
 // AppendOrReplaceQueryParameter(
 //     GURL("http://example.com"), "name", "new").spec()
 // => "http://example.com?name=value"
 // AppendOrReplaceQueryParameter(
 //     GURL("http://example.com?x=y&name=old"), "name", "new").spec()
 // => "http://example.com?x=y&name=new"
 NET_EXPORT GURL AppendOrReplaceQueryParameter(const GURL& url,
                                               const std::string& name,
                                               const std::string& value);
 
+// Iterates over the key-value pairs in the query portion of |url|.
+class NET_EXPORT QueryIterator {
+ public:
+  explicit QueryIterator(const GURL& url);
+  ~QueryIterator();
+
+  std::string GetKey() const;
+  std::string GetValue() const;
+  const std::string& GetUnescapedValue();
+
+  bool IsAtEnd() const;
+  void Advance();
+
+ private:
+  const GURL& url_;
+  url_parse::Component query_;
+  bool at_end_;
+  url_parse::Component key_;
+  url_parse::Component value_;
+  std::string unescaped_value_;
+
+  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);
 
 }  // namespace net
 
 #endif  // NET_BASE_URL_UTIL_H_