Fix a browser crash involving omnibox extension keywords.

chrome/browser/autocomplete/autocomplete_classifier.cc

 // 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.
 
 #include "chrome/browser/autocomplete/autocomplete_classifier.h"
 
 #include "base/auto_reset.h"
 #include "chrome/browser/autocomplete/autocomplete.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "googleurl/src/gurl.h"
 
 AutocompleteClassifier::AutocompleteClassifier(Profile* profile)
     : controller_(new AutocompleteController(profile, NULL)),
       inside_classify_(false) {
 }
 
 AutocompleteClassifier::~AutocompleteClassifier() {
 }
 
 void AutocompleteClassifier::Classify(const string16& text,
                                       const string16& desired_tld,
+                                      bool prefer_keyword,
                                       bool allow_exact_keyword_match,
                                       AutocompleteMatch* match,
                                       GURL* alternate_nav_url) {
   DCHECK(!inside_classify_);
   AutoReset<bool> reset(&inside_classify_, true);
-  controller_->Start(text, desired_tld, true, false, allow_exact_keyword_match,
-                     AutocompleteInput::BEST_MATCH);
+  controller_->Start(text, desired_tld, true, prefer_keyword,
+                     allow_exact_keyword_match, AutocompleteInput::BEST_MATCH);
   DCHECK(controller_->done());
   const AutocompleteResult& result = controller_->result();
   if (result.empty()) {
     if (alternate_nav_url)
       *alternate_nav_url = GURL();
     return;
   }
 
   DCHECK(result.default_match() != result.end());
   *match = *result.default_match();
   if (alternate_nav_url)
     *alternate_nav_url = result.alternate_nav_url();
 }