Refactor Timer classes in preparation for landing FrameTimers.

third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
     Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
@@ skipping 506 matching lines @@
     // already initialized for the revalidation here, but won't start loading.
     if (!resourceNeedsLoad(resource, request, policy))
         return resource;
 
     if (!startLoad(resource))
         return nullptr;
     ASSERT(!resource->errorOccurred() || request.options().synchronousPolicy == RequestSynchronously);
     return resource;
 }
 
-void ResourceFetcher::resourceTimingReportTimerFired(Timer<ResourceFetcher>* timer)
+void ResourceFetcher::resourceTimingReportTimerFired(TimerBase* timer)
 {
     ASSERT_UNUSED(timer, timer == &m_resourceTimingReportTimer);
     Vector<std::unique_ptr<ResourceTimingInfo>> timingReports;
     timingReports.swap(m_scheduledResourceTimingReports);
     for (const auto& timingInfo : timingReports)
         context().addResourceTiming(*timingInfo);
 }
 
 void ResourceFetcher::determineRequestContext(ResourceRequest& request, Resource::Type type, bool isMainFrame)
 {
@@ skipping 734 matching lines @@
     visitor->trace(m_context);
     visitor->trace(m_archive);
     visitor->trace(m_loaders);
     visitor->trace(m_nonBlockingLoaders);
     visitor->trace(m_documentResources);
     visitor->trace(m_preloads);
     visitor->trace(m_resourceTimingInfoMap);
 }
 
 } // namespace blink