autocomplete: Add AutocompleteProvider::Type enum.

chrome/browser/autocomplete/history_contents_provider.cc

 // 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.
 
 #include "chrome/browser/autocomplete/history_contents_provider.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
@@ skipping 33 matching lines @@
     const HistoryContentsProvider::MatchReference& rhs) {
   if (lhs.relevance != rhs.relevance)
     return lhs.relevance > rhs.relevance;
   return lhs.result->last_visit() > rhs.result->last_visit();
 }
 
 HistoryContentsProvider::HistoryContentsProvider(
     AutocompleteProviderListener* listener,
     Profile* profile,
     bool body_only)
-    : HistoryProvider(listener, profile, "HistoryContents"),
+    : HistoryProvider(listener,
+                      profile,
+                      AutocompleteProvider::TYPE_HISTORY_CONTENTS),
       star_title_count_(0),
       star_contents_count_(0),
       title_count_(0),
       contents_count_(0),
       input_type_(AutocompleteInput::INVALID),
       body_only_(body_only),
       trim_http_(false),
       have_results_(false) {
 }
 
@@ skipping 217 matching lines @@
   UMA_HISTOGRAM_TIMES("Omnibox.QueryBookmarksTime",
                       TimeTicks::Now() - start_time);
 }
 
 void HistoryContentsProvider::AddBookmarkTitleMatchToResults(
     const bookmark_utils::TitleMatch& match) {
   history::URLResult url_result(match.node->url(), match.match_positions);
   url_result.set_title(match.node->GetTitle());
   results_.AppendURLBySwapping(&url_result);
 }