clang: Fix several -Woverloaded-virtual warnings.

webkit/plugins/npapi/test/plugin_schedule_timer_test.h

 // 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 WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_SCHEDULE_TIMER_TEST_H
 #define WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_SCHEDULE_TIMER_TEST_H
 
 #include "base/time.h"
 #include "webkit/plugins/npapi/test/plugin_test.h"
 
@@ skipping 38 matching lines @@
   int num_received_events_;
 
   // Set of events that have been received (by index).
   bool received_events_[kNumEvents];
 
   // Time of initial event.
   base::Time start_time_;
 
   // Returns index of matching unreceived event or -1 if not found.
   int FindUnreceivedEvent(int time, uint32 timer_id);
-  void HandleEvent(int event_index);
+  void HandleEventIndex(int event_index);
 };
 
 }  // namespace NPAPIClient
 
 #endif  // WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_SCHEDULE_TIMER_TEST_H