Reviewed by Jon Honeycutt.

        http://bugs.webkit.org/show_bug.cgi?id=16924
        Bug 16924: Shared PluginDatabase, PluginPackage, and PlugInInfoStore implementations

        Add PluginInfoStore.cpp and new PluginDatabase.cpp to GTK+ and Qt ports.
        Remove old PlugInInfoStoreQt.cpp as it is obsoleted by shared code.
        Add PluginInfoStore, PluginDatabase, and PluginStream files to Wx build.
        Add new PluginDatabase.cpp to Windows build.
        Add temporary stubs for new PluginDatabase and PluginPackage.
        shared classes to GTK+, Qt, and Wx ports.
        Copy PluginDatabaseWin.cpp to PluginDatabase.cpp to preserve history.
        Remove shared code from PluginDatabaseWin.cpp.
        Remove Windows-specific code from PluginDatabase.cpp.
        Use PlatformModule and PlatformFileTime instead of HMODULE and FILETIME.
        Remove extraneous PluginPackage:: from hash() class method prototype.
        Subsume storeFileVersion into PluginPackage::fetchInfo.
        Add cross-platform PlatformModuleVersion type definition.
        Use PlatformModuleVersion to store the module version.
        Rename m_fileVersion[ML]S to m_moduleVersion.
        Change compareFileVersion to use PlatformModuleVersion as the argument.
        Move PluginView::determineQuirks and m_quirks to PluginPackage.
        Updated determineQuirks for the PlatformModuleVersion.

        * GNUmakefile.am:
        * WebCore.pro:
        * WebCoreSources.bkl:
        * webcore-base.bkl:
        * WebCore.vcproj/WebCore.vcproj:
        * Platform/FileSystem.h:
        * platform/qt/PlugInInfoStoreQt.cpp:
        * platform/gtk/TemporaryLinkStubs.cpp:
        * platform/qt/TemporaryLinkStubs.cpp:
        * platform/wx/TemporaryLinkStubs.cpp:
        * plugins/PluginDatabase.cpp:
        * plugins/PluginDatabase.h:
        * plugins/win/PluginDatabaseWin.cpp:
        * plugins/PluginPackage.h:
        * plugins/win/PluginPackageWin.cpp:
        * plugins/PluginView.h:
        * plugins/win/PluginViewWin.cpp:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@30574 268f45cc-cd09-0410-ab3c-d52691b4dbfc