Reviewed by Sam Weinig.

        Generalize delayed plug-in start for background tabs for use for other media
        https://bugs.webkit.org/show_bug.cgi?id=34981

        * WebView.cpp:
        (WebView::setCanStartPlugins): Change to call setCanStartMedia.
        In a later patch we can change the of the public function in the IDL file too,
        but for now this should be enough.
2010-02-16  Darin Adler  <darin@apple.com>

        Reviewed by Sam Weinig.

        Generalize delayed plug-in start for background tabs for use for other media
        https://bugs.webkit.org/show_bug.cgi?id=34981

        * WebView/WebHTMLView.mm:
        (-[WebHTMLView viewWillMoveToWindow:]): Added comment.
        (-[WebHTMLView viewDidMoveToWindow]): Ditto.

        * WebView/WebView.mm:
        (-[WebView _commonInitializationWithFrameName:groupName:usesDocumentViews:]):
        Call setCanStartMedia right away so that if this view is not in a window, it
        will not start any media.
        (-[WebView viewWillMoveToWindow:]): Call setCanStartMedia(false) when moving
        to a window of nil.
        (-[WebView viewDidMoveToWindow]): Call setCanStartMedia(true) when moved to
        a window that is non-nil.
2010-02-16  Darin Adler  <darin@apple.com>

        Reviewed by Sam Weinig.

        Generalize delayed plug-in start for background tabs for use for other media
        https://bugs.webkit.org/show_bug.cgi?id=34981

        Also did some simple cleanup of HTMLMediaElement to get ready to make it
        a client of the same mechanism.

        * WebCore.base.exp: Added Page::setCanStartMedia and resorted.
        * WebCore.xcodeproj/project.pbxproj: Added MediaCanStartListener.h.

        * html/HTMLAudioElement.h: Added an implementation of isVideo since that
        is now a pure virtual function in HTMLMediaElement. Also made tagPriority
        private.

        * html/HTMLMediaElement.h: Made it clearer that HTMLMediaElement is an
        abstract base class by making its constructor protected and making the
        isVideo function a pure virtual function.

        * page/Page.cpp:
        (WebCore::Page::Page): Updated for name change from m_canStartPlugins
        to m_canStartMedia.
        (WebCore::Page::addMediaCanStartListener): Renamed and added an assertion.
        (WebCore::Page::removeUnstartedMedia): Ditto.
        (WebCore::Page::setCanStartMedia): Renamed plugin to media and moved
        the code here from PageWin.cpp. The main change from the one in PageWin.cpp
        is that this function calls mediaCanStart rather than explicitly calling a
        combination of start and dispatchDidFailToStartPlugin on a PluginView.

        * page/Page.h: Re-sorted forward class declarations. Renamed the plugin
        starting functions to media starting names and changed types from
        PluginView to MediaCanStartListener.

        * page/MediaCanStartListener.h: Added.

        * page/win/PageWin.cpp: Moved setCanStartPlugins to the platform-independent
        Page.cpp file so it can be used for more than just Windows plug-ins.

        * plugins/PluginView.cpp: Sorted includes.
        (WebCore::PluginView::startOrAddToUnstartedList): Use addMediaCanStartListener.
        (WebCore::PluginView::mediaCanStart): Added. Called when the page decides that
        media can start. Contains the code that used to be in Page::setCanStartPlugins.
        (WebCore::PluginView::removeFromUnstartedListIfNecessary): Use
        removeMediaCanStartListener.

        * plugins/PluginView.h: Adopted MediaCanStartListener.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@54849 268f45cc-cd09-0410-ab3c-d52691b4dbfc