Omnibox SearchProvider Experiment Client Implementation.

chrome/browser/autocomplete/url_prefix.h

 // Copyright (c) 2012 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 CHROME_BROWSER_AUTOCOMPLETE_URL_PREFIX_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_URL_PREFIX_H_
 #pragma once
 
 #include <vector>
 
 #include "base/string16.h"
 
 struct URLPrefix;
 typedef std::vector<URLPrefix> URLPrefixes;
 
 // A URL prefix; combinations of schemes and (least significant) domain labels
 // that may be inferred from certain URL-like input strings.
 struct URLPrefix {
   URLPrefix(const string16& prefix, size_t num_components);
 
-  // Returns a vector of valid URL prefixes.
+  // Returns a vector of URL prefixes sorted by descending number of components.
   static const URLPrefixes& GetURLPrefixes();
 
   // Returns if the argument is a valid URL prefix.
   static bool IsURLPrefix(const string16& prefix);
 
   // Returns the prefix with the most components that begins |text|, or NULL.
   // |prefix_suffix| (which may be empty) is appended to every attempted prefix,
   // which is useful for finding the innermost match of user input in a URL.
+  // Performs case insensitive string comparison.
   static const URLPrefix* BestURLPrefix(const string16& text,
                                         const string16& prefix_suffix);
 
   string16 prefix;
 
   // The number of URL components (scheme, domain label, etc.) in the prefix.
   // For example, "http://foo.com" and "www.bar.com" each have one component,
   // while "ftp://ftp.ftp.com" has two, and "mysite.com" has none.
   size_t num_components;
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_URL_PREFIX_H_