autocomplete: Add AutocompleteProvider::Type enum.

chrome/browser/autocomplete/history_url_provider.h

 // Copyright (c) 2012 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_AUTOCOMPLETE_HISTORY_URL_PROVIDER_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_HISTORY_URL_PROVIDER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 124 matching lines @@
 // This class is an autocomplete provider and is also a pseudo-internal
 // component of the history system.  See comments above.
 class HistoryURLProvider : public HistoryProvider {
  public:
   HistoryURLProvider(AutocompleteProviderListener* listener, Profile* profile);
 
 #ifdef UNIT_TEST
   HistoryURLProvider(AutocompleteProviderListener* listener,
                      Profile* profile,
                      const std::string& languages)
-    : HistoryProvider(listener, profile, "History"),
+    : HistoryProvider(listener, profile,
+          AutocompleteProvider::TYPE_HISTORY_URL),
       params_(NULL),
       languages_(languages) {}
 #endif
 
   // Returns a match corresponding to exactly what the user has typed.
   // NOTE: This does not set the relevance of the returned match, as different
   //       callers want different behavior. Callers must set this manually.
   // This function is static so SearchProvider may construct similar matches.
   static AutocompleteMatch SuggestExactInput(AutocompleteProvider* provider,
                                              const AutocompleteInput& input,
@@ skipping 122 matching lines @@
   // parameter itself is freed once it's no longer needed.  The only reason we
   // keep this member is so we can set the cancel bit on it.
   HistoryURLProviderParams* params_;
 
   // Only used by unittests; if non-empty, overrides accept-languages in the
   // profile's pref system.
   std::string languages_;
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_URL_PROVIDER_H_