Bug 96114 [IDE] should remove dependency on IPluginRegistry
We should remove our dependency on IPluginRegistry in favour of the new IExtensionRegistry. This should be a trivial migration.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/registry/MarkerImageProviderRegistry.java
private static final String ATT_PROVIDER_CLASS = "class";
    private static final String ATT_ICON = "icon";
    private static final String ATT_MARKER_TYPE = "markertype";
    private static final String ATT_ID = "id";
    private static final String MARKER_ATT_KEY = "org.eclipse.ui.internal.registry.MarkerImageProviderRegistry";
    private static final String TAG_PROVIDER = "imageprovider";
    private ArrayList descriptors = new ArrayList();
    class Descriptor {