Don't call AutocompleteInput::Parse() on a background thread, part 1.

chrome/browser/autocomplete/history_url_provider.h

Index: chrome/browser/autocomplete/history_url_provider.h
diff --git a/chrome/browser/autocomplete/history_url_provider.h b/chrome/browser/autocomplete/history_url_provider.h
index 57a91ecae1c083e3567770db87318a9b1634f71f..dc3bcb5dd333e0600833c8e1f0346f12c57c429d 100644
--- a/chrome/browser/autocomplete/history_url_provider.h
+++ b/chrome/browser/autocomplete/history_url_provider.h
@@ -91,6 +91,7 @@ class URLDatabase;
 struct HistoryURLProviderParams {
   HistoryURLProviderParams(const AutocompleteInput& input,
                            bool trim_http,
+                           const AutocompleteMatch& what_you_typed_match,
                            const std::string& languages,
                            TemplateURL* default_search_provider,
                            const SearchTermsData& search_terms_data);
@@ -110,6 +111,9 @@ struct HistoryURLProviderParams {
   // Set when "http://" should be trimmed from the beginning of the URLs.
   bool trim_http;
 
+  // A match corresponding to what the user typed.
+  AutocompleteMatch what_you_typed_match;
+
   // Set by the main thread to cancel this request.  If this flag is set when
   // the query runs, the query will be abandoned.  This allows us to avoid
   // running queries that are no longer needed.  Since we don't care if we run
@@ -229,9 +233,8 @@ class HistoryURLProvider : public HistoryProvider {
   // the front of |matches| (so we pick the right matches to throw away
   // when culling redirects to/from it).  Returns whether a match was promoted.
   bool FixupExactSuggestion(history::URLDatabase* db,
-                            const AutocompleteInput& input,
                             const VisitClassifier& classifier,
-                            AutocompleteMatch* match,
+                            HistoryURLProviderParams* params,
                             history::HistoryMatches* matches) const;
 
   // Helper function for FixupExactSuggestion, this returns true if the input
@@ -240,9 +243,8 @@ class HistoryURLProvider : public HistoryProvider {
   bool CanFindIntranetURL(history::URLDatabase* db,
                           const AutocompleteInput& input) const;
 
-  // Determines if |match| is suitable for inline autocomplete.  If so, and if
-  // |params| is non-NULL, promotes the match.  Returns whether |match| is
-  // suitable for inline autocomplete.
+  // Determines if |match| is suitable for inline autocomplete.  If so, promotes
+  // the match.  Returns whether |match| was promoted.
   bool PromoteMatchForInlineAutocomplete(const history::HistoryMatch& match,
                                          HistoryURLProviderParams* params);
 
@@ -256,7 +258,6 @@ class HistoryURLProvider : public HistoryProvider {
       history::URLDatabase* db,
       const HistoryURLProviderParams& params,
       bool have_what_you_typed_match,
-      const AutocompleteMatch& what_you_typed_match,
       history::HistoryMatches* matches);
 
   // Removes results that have been rarely typed or visited, and not any time