https://bugs.webkit.org/show_bug.cgi?id=93883

        Reviewed by Sam Weinig.

        There was one plug-in message renaming. Moving it, and also other plug-in messages
        for consistency.

        * UIProcess/WebContext.cpp:
        (WebKit): Got rid of the last MESSAGE_CHECK in this file.
        (WebKit::WebContext::WebContext): Moved m_pluginWorkQueue to a singleton.
        We don't need more than one queue (all it does is read plug-in info), and if we
        needed, it would have been per-process, not per-context.
        (WebKit::WebContext::~WebContext): No more work queue.
        (WebKit::WebContext::processDidFinishLaunching): Ditto.

        * UIProcess/WebContext.h: No longer needs to be a QueueClient.

        * UIProcess/WebContext.messages.in:
        * UIProcess/WebProcessProxy.messages.in:
        Moved plug-in related messages.

        * UIProcess/WebProcessProxy.cpp:
        (WebKit::pluginWorkQueue): Moved from WebContext to a singleton.
        (WebKit::WebProcessProxy::sendDidGetPlugins): Moved from WebContext.
        (WebKit::WebProcessProxy::handleGetPlugins): Ditto.
        (WebKit::WebProcessProxy::getPlugins): Ditto.
        (WebKit::WebProcessProxy::getPluginPath): Ditto.
        (WebKit::WebProcessProxy::getPluginProcessConnection): Ditto.
        (WebKit::WebProcessProxy::didGetSitesWithPluginData): Ditto.
        (WebKit::WebProcessProxy::didClearPluginSiteData): Ditto.

        * UIProcess/WebProcessProxy.h: Process proxy needs to be thread safe ref counted
        now, since it sends messages to itself on a work queue and back.

        * WebProcess/WebCoreSupport/WebPlatformStrategies.cpp:
        (WebKit::WebPlatformStrategies::populatePluginCache): Updated for new receiver.

        * WebProcess/WebPage/WebPage.cpp: (WebKit::WebPage::createPlugin): Ditto.

        * WebProcess/WebProcess.cpp: (WebKit::canPluginHandleResponse): Ditto.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@125451 268f45cc-cd09-0410-ab3c-d52691b4dbfc