Fix Acid3 Test 48: LINKTEST, Chromium side....

chrome/browser/visitedlink_event_listener.h

+// Copyright (c) 2009 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.
+
+// VisitedLinkEventListener broadcasts link coloring database updates to all
+// processes. It also coalesces the updates to avoid excessive broadcasting of
+// messages to the renderers.
+
+#ifndef VISITEDLINK_EVENT_LISTENER_H_
+#define VISITEDLINK_EVENT_LISTENER_H_
+
+#include "base/timer.h"
+#include "chrome/browser/visitedlink_master.h"
+
+namespace base {
+class SharedMemory;
+}
+
+class VisitedLinkEventListener : public VisitedLinkMaster::Listener {
+ public:
+  VisitedLinkEventListener() {}
+  virtual ~VisitedLinkEventListener() {}
+
+  virtual void NewTable(base::SharedMemory* table_memory);
+  virtual void Add(VisitedLinkMaster::Fingerprint fingerprint);
+  virtual void Reset();
+
+ private:
+  void CommitVisitedLinks();
+
+  base::OneShotTimer<VisitedLinkEventListener> coalesce_timer_;
+  VisitedLinkCommon::Fingerprints pending_visited_links_;
+
+  DISALLOW_COPY_AND_ASSIGN(VisitedLinkEventListener);
+};
+
+#endif  // VISITEDLINK_EVENT_LISTENER_H_