Reviewed by David Levin.

        Need didReceiveCachedMetadata, and finishTime for didFinishLoading exposed in ThreadableLoaderClient
        https://bugs.webkit.org/show_bug.cgi?id=54313

        No tests needed, exposes no new functionality

        * fileapi/FileReaderLoader.cpp:
        (WebCore::FileReaderLoader::didFinishLoading):
        * fileapi/FileReaderLoader.h:
        * loader/DocumentThreadableLoader.cpp:
        (WebCore::DocumentThreadableLoader::setDefersLoading):
        (WebCore::DocumentThreadableLoader::didReceiveCachedMetadata):
        (WebCore::DocumentThreadableLoader::didFinishLoading):
        (WebCore::DocumentThreadableLoader::loadRequest):
        * loader/DocumentThreadableLoader.h:
        * loader/ThreadableLoaderClient.h:
        (WebCore::ThreadableLoaderClient::didReceiveData):
        (WebCore::ThreadableLoaderClient::didReceiveCachedMetadata):
        (WebCore::ThreadableLoaderClient::didFinishLoading):
        * loader/ThreadableLoaderClientWrapper.h:
        (WebCore::ThreadableLoaderClientWrapper::didReceiveData):
        (WebCore::ThreadableLoaderClientWrapper::didReceiveCachedMetadata):
        (WebCore::ThreadableLoaderClientWrapper::didFinishLoading):
        * loader/WorkerThreadableLoader.cpp:
        (WebCore::workerContextDidReceiveCachedMetadata):
        (WebCore::WorkerThreadableLoader::MainThreadBridge::didReceiveCachedMetadata):
        (WebCore::workerContextDidFinishLoading):
        (WebCore::WorkerThreadableLoader::MainThreadBridge::didFinishLoading):
        * loader/WorkerThreadableLoader.h:
        * notifications/Notification.cpp:
        (WebCore::Notification::didFinishLoading):
        * notifications/Notification.h:
        * page/EventSource.cpp:
        (WebCore::EventSource::didFinishLoading):
        * page/EventSource.h:
        * workers/WorkerScriptLoader.cpp:
        (WebCore::WorkerScriptLoader::didFinishLoading):
        * workers/WorkerScriptLoader.h:
        * xml/XMLHttpRequest.cpp:
        (WebCore::XMLHttpRequest::didFinishLoading):
        * xml/XMLHttpRequest.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@78782 268f45cc-cd09-0410-ab3c-d52691b4dbfc