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// Copyright (c) 2011 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_PRERENDER_PRERENDER_UTIL_H_
#define CHROME_BROWSER_PRERENDER_PRERENDER_UTIL_H_
#include "base/basictypes.h"
#include "url/gurl.h"
namespace net {
class URLRequest;
}
namespace prerender {
// ID indicating that no experiment is active.
const uint8 kNoExperiment = 0;
// Extracts a urlencoded URL stored in a url= query parameter from a URL
// supplied, if available, and stores it in alias_url. Returns whether or not
// the operation succeeded (i.e. a valid URL was found).
bool MaybeGetQueryStringBasedAliasURL(const GURL& url, GURL* alias_url);
// Extracts an experiment stored in the query parameter
// lpe= from the URL supplied, and returns it.
// Returns kNoExperiment if no experiment ID is found, or if the ID
// is not an integer in the range 1 to 9.
uint8 GetQueryStringBasedExperiment(const GURL& url);
// Indicates whether the URL provided has a Google domain
bool IsGoogleDomain(const GURL& url);
// Indicates whether the URL provided could be a Google search result page.
bool IsGoogleSearchResultURL(const GURL& url);
// The prerender contents of some experiments should never be swapped in
// by pretending to never match on the URL. This function will return true
// iff this is the case for the experiment_id specified.
bool IsNoSwapInExperiment(uint8 experiment_id);
// The prerender contents of some experiments should behave identical to the
// control group, regardless of the field trial. This function will return true
// iff this is the case for the experiment_id specified.
bool IsControlGroupExperiment(uint8 experiment_id);
// Static method gathering stats about a URLRequest for which a response has
// just started.
void URLRequestResponseStarted(net::URLRequest* request);
} // namespace prerender
#endif // CHROME_BROWSER_PRERENDER_PRERENDER_UTIL_H_
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