Fix a browser crash involving omnibox extension keywords.

chrome/browser/autocomplete/autocomplete_classifier.h

Index: chrome/browser/autocomplete/autocomplete_classifier.h
diff --git a/chrome/browser/autocomplete/autocomplete_classifier.h b/chrome/browser/autocomplete/autocomplete_classifier.h
index d09f304e9013ec25d761a313b93df92b21a3f1f2..a089cef1a126af4aa8bfc884360075dd942ced3a 100644
--- a/chrome/browser/autocomplete/autocomplete_classifier.h
+++ b/chrome/browser/autocomplete/autocomplete_classifier.h
@@ -25,6 +25,8 @@ class AutocompleteClassifier {
   // Given some string |text| that the user wants to use for navigation,
   // determines how it should be interpreted.  |desired_tld| is the user's
   // desired TLD, if any; see AutocompleteInput::desired_tld().
+  // |prefer_keyword| should be true the when keyword UI is onscreen; see
+  // comments on AutocompleteController::Start().
   // |allow_exact_keyword_match| should be true when treating the string as a
   // potential keyword search is valid; see
   // AutocompleteInput::allow_exact_keyword_match(). |match| should be a
@@ -36,6 +38,7 @@ class AutocompleteClassifier {
   // AutocompleteResult::alternate_nav_url_ in autocomplete.h.
   void Classify(const string16& text,
                 const string16& desired_tld,
+                bool prefer_keyword,
                 bool allow_exact_keyword_match,
                 AutocompleteMatch* match,
                 GURL* alternate_nav_url);