Pointer Lock IDL tests

interface EventTarget {
};

interface Node : EventTarget {
};

interface Element : Node {
};

interface Document : Node {
};

interface Event {
};

interface MouseEvent : Event {
};

partial interface Element {
    void requestPointerLock ();
};

partial interface Document {
                attribute EventHandler onpointerlockchange;
                attribute EventHandler onpointerlockerror;
    readonly    attribute Element?     pointerLockElement;
    void exitPointerLock ();
};

partial interface MouseEvent {
    readonly    attribute long movementX;
    readonly    attribute long movementY;
};

partial dictionary MouseEventInit {
        long movementX = 0;
        long movementY = 0;
};