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diff --git a/chrome/test/test_notification_tracker.cc b/chrome/test/test_notification_tracker.cc
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "chrome/test/test_notification_tracker.h"
+#include "chrome/common/notification_types.h"
+
+TestNotificationTracker::Event::Event()
+    : type(NOTIFY_ALL),
+      source(NotificationService::AllSources()),
+      details(NotificationService::NoDetails()) {
+}
+TestNotificationTracker::Event::Event(NotificationType t,
+                                      NotificationSource s,
+                                      NotificationDetails d)
+    : type(t),
+      source(s),
+      details(d) {
+}
+
+TestNotificationTracker::TestNotificationTracker() {
+}
+
+TestNotificationTracker::~TestNotificationTracker() {
+  NotificationService* service = NotificationService::current();
+  for (size_t i = 0; i < listening_.size(); i++)
+    service->RemoveObserver(this, listening_[i].first, listening_[i].second);
+  listening_.clear();
+}
+
+void TestNotificationTracker::ListenFor(NotificationType type,
+                                        const NotificationSource& source) {
+  listening_.push_back(std::make_pair(type, source));
+  NotificationService::current()->AddObserver(this, type, source);
+}
+
+void TestNotificationTracker::Reset() {
+  events_.clear();
+}
+
+bool TestNotificationTracker::Check1AndReset(NotificationType type) {
+  if (size() != 1) {
+    Reset();
+    return false;
+  }
+  bool success = events_[0].type == type;
+  Reset();
+  return success;
+}
+
+bool TestNotificationTracker::Check2AndReset(NotificationType type1,
+                                             NotificationType type2) {
+  if (size() != 2) {
+    Reset();
+    return false;
+  }
+  bool success = events_[0].type == type1 && events_[1].type == type2;
+  Reset();
+  return success;
+}
+
+bool TestNotificationTracker::Check3AndReset(NotificationType type1,
+                                             NotificationType type2,
+                                             NotificationType type3) {
+  if (size() != 3) {
+    Reset();
+    return false;
+  }
+  bool success = events_[0].type == type1 &&
+                 events_[1].type == type2 &&
+                 events_[2].type == type3;
+  Reset();
+  return success;
+}
+
+void TestNotificationTracker::Observe(NotificationType type,
+                                      const NotificationSource& source,
+                                      const NotificationDetails& details) {
+  events_.push_back(Event(type, source, details));
+}