Remove PrerenderLocalPredictor, part 1.

chrome/browser/prerender/prerender_util.h

 // 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 "content/public/common/resource_type.h"
 #include "url/gurl.h"
 
 namespace net {
 class HttpResponseHeaders;
 class URLRequest;
 }
 
 namespace prerender {
 
-extern const char kChromeNavigateExtraDataKey[];
-
 // 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.
@@ skipping 30 matching lines @@
 
 // Report a URL was canceled due to trying to handle an external URL.
 void ReportPrerenderExternalURL();
 
 // Report a URL was canceled due to unsupported prerender scheme.
 void ReportUnsupportedPrerenderScheme(const GURL& url);
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_UTIL_H_