Remove the unmaintained performance monitor.

chrome/browser/performance_monitor/event_type.h

Index: chrome/browser/performance_monitor/event_type.h
diff --git a/chrome/browser/performance_monitor/event_type.h b/chrome/browser/performance_monitor/event_type.h
deleted file mode 100644
index fd19cacb6517ea234b4bac90bc24a7a5990de1f6..0000000000000000000000000000000000000000
--- a/chrome/browser/performance_monitor/event_type.h
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2013 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_PERFORMANCE_MONITOR_EVENT_TYPE_H_
-#define CHROME_BROWSER_PERFORMANCE_MONITOR_EVENT_TYPE_H_
-
-namespace performance_monitor {
-
-// IMPORTANT: To add new events, please
-// - Place the new event above EVENT_NUMBER_OF_EVENTS.
-// - Add a member to the EventKeyChar enum in key_builder.cc.
-// - Add the appropriate messages in generated_resources.grd.
-// - Add the appropriate functions in
-//   chrome/browser/ui/webui/performance_monitor/performance_monitor_l10n.h.
-enum EventType {
-  EVENT_UNDEFINED,
-
-  // Extension-Related events
-  EVENT_EXTENSION_INSTALL,
-  EVENT_EXTENSION_UNINSTALL,
-  EVENT_EXTENSION_UPDATE,
-  EVENT_EXTENSION_ENABLE,
-  EVENT_EXTENSION_DISABLE,
-
-  // Chrome's version has changed.
-  EVENT_CHROME_UPDATE,
-
-  // Renderer-Failure related events; these correspond to the RENDERER_HANG
-  // event, and the two termination statuses ABNORMAL_EXIT and PROCESS_KILLED,
-  // respectively.
-  EVENT_RENDERER_HANG,
-  EVENT_RENDERER_CRASH,
-  EVENT_RENDERER_KILLED,
-
-  // Chrome did not shut down correctly.
-  EVENT_UNCLEAN_EXIT,
-
-  EVENT_NUMBER_OF_EVENTS
-};
-
-}  // namespace performance_monitor
-
-#endif  // CHROME_BROWSER_PERFORMANCE_MONITOR_EVENT_TYPE_H_