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diff --git a/chrome/browser/autocomplete/history_quick_provider.h b/chrome/browser/autocomplete/history_quick_provider.h
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+++ b/chrome/browser/autocomplete/history_quick_provider.h
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+// Copyright (c) 2010 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_QUICK_PROVIDER_H_
+#define CHROME_BROWSER_AUTOCOMPLETE_HISTORY_QUICK_PROVIDER_H_
+
+#include "chrome/browser/autocomplete/autocomplete.h"
+
+// This class is an autocomplete provider (a pseudo-internal component of
+// the history system) which quickly (and synchronously) provides matching
+// results from recently or frequently visited sites in the profile's
+// history.
+//
+// TODO(mrossetti): Review to see if the following applies since we're not
+// using the database during the autocomplete pass.
+//
+// Note: This object can get leaked on shutdown if there are pending
+// requests on the database (which hold a reference to us). Normally, these
+// messages get flushed for each thread. We do a round trip from main, to
+// history, back to main while holding a reference. If the main thread
+// completes before the history thread, the message to delegate back to the
+// main thread will not run and the reference will leak. Therefore, don't do
+// anything on destruction.
+class HistoryQuickProvider : public AutocompleteProvider {
+ public:
+  HistoryQuickProvider(ACProviderListener* listener, Profile* profile)
+      : AutocompleteProvider(listener, profile, "HistoryQuickProvider") {}
+
+  // no destructor (see note above)
+
+  // AutocompleteProvider
+  void Start(const AutocompleteInput& input, bool minimal_changes);
+
+ private:
+  ~HistoryQuickProvider() {}
+};
+
+#endif  // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_QUICK_PROVIDER_H_