Bug 1318096 part 3. Remove the unused XPCOM fullscreen API. r=froydnj

dom/base/Element.h

@@ -1887,11 +1887,5 @@ NS_IMETHOD ReleaseCapture(void) final override                                \
 {                                                                             \
   Element::ReleaseCapture();                                                  \
   return NS_OK;                                                               \
-}                                                                             \
-NS_IMETHOD MozRequestFullScreen(void) final override                          \
-{                                                                             \
-  mozilla::ErrorResult rv;                                                    \
-  Element::RequestFullscreen(rv);                                    \
-  return rv.StealNSResult();                                                  \
 }
 #endif // mozilla_dom_Element_h__

dom/base/nsDocument.cpp

@@ -10468,13 +10468,6 @@ nsDocument::SetFullscreenRoot(nsIDocument* aRoot)
   mFullscreenRoot = do_GetWeakReference(aRoot);
 }
 
-NS_IMETHODIMP
-nsDocument::MozCancelFullScreen()
-{
-  nsIDocument::ExitFullscreen();
-  return NS_OK;
-}
-
 void
 nsIDocument::ExitFullscreen()
 {
@@ -11412,15 +11405,6 @@ nsDocument::ApplyFullscreen(const FullscreenRequest& aRequest)
   return true;
 }
 
-NS_IMETHODIMP
-nsDocument::GetMozFullScreenElement(nsIDOMElement **aFullScreenElement)
-{
-  Element* el = GetFullscreenElement();
-  nsCOMPtr<nsIDOMElement> retval = do_QueryInterface(el);
-  retval.forget(aFullScreenElement);
-  return NS_OK;
-}
-
 Element*
 nsDocument::GetFullscreenElement()
 {
@@ -11431,21 +11415,6 @@ nsDocument::GetFullscreenElement()
   return element;
 }
 
-NS_IMETHODIMP
-nsDocument::GetMozFullScreen(bool *aFullScreen)
-{
-  *aFullScreen = Fullscreen();
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-nsDocument::GetMozFullScreenEnabled(bool *aFullScreen)
-{
-  NS_ENSURE_ARG_POINTER(aFullScreen);
-  *aFullScreen = FullscreenEnabled();
-  return NS_OK;
-}
-
 bool
 nsDocument::FullscreenEnabled()
 {

dom/html/nsHTMLDocument.h

@@ -94,7 +94,6 @@ public:
   using nsDocument::SetTitle;
   using nsDocument::GetLastStyleSheetSet;
   using nsDocument::MozSetImageElement;
-  using nsDocument::GetMozFullScreenElement;
 
   // nsIDOMNode interface
   NS_FORWARD_NSIDOMNODE_TO_NSINODE

dom/interfaces/core/nsIDOMDocument.idl

@@ -334,39 +334,6 @@ interface nsIDOMDocument : nsIDOMNode
   void mozSetImageElement(in DOMString aImageElementId,
                           in nsIDOMElement aImageElement);
 
-  /**
-   * Element which is currently the full-screen element as per the DOM
-   * full-screen api.
-   *
-   * @see <https://wiki.mozilla.org/index.php?title=Gecko:FullScreenAPI>
-   */
-  readonly attribute nsIDOMElement mozFullScreenElement;
-
-  /**
-   * Causes the document to leave DOM full-screen mode, if it's in
-   * full-screen mode, as per the DOM full-screen api.
-   *
-   * @see <https://wiki.mozilla.org/index.php?title=Gecko:FullScreenAPI>
-   */
-  void mozCancelFullScreen();   
-  
-  /**
-   * Denotes whether this document is in DOM full-screen mode, as per the DOM
-   * full-screen api.
-   *
-   * @see <https://wiki.mozilla.org/index.php?title=Gecko:FullScreenAPI>
-   */
-  readonly attribute boolean mozFullScreen;  
-
-  /**
-   * Denotes whether the full-screen-api.enabled is true, no windowed
-   * plugins are present, and all ancestor documents have the
-   * allowfullscreen attribute set.
-   *
-   * @see <https://wiki.mozilla.org/index.php?title=Gecko:FullScreenAPI>
-   */
-  readonly attribute boolean mozFullScreenEnabled;
-
   /**
    * Retrieve the location of the caret position (DOM node and character
    * offset within that node), given a point.

dom/interfaces/core/nsIDOMElement.idl

@@ -201,13 +201,4 @@ interface nsIDOMElement : nsIDOMNode
    * element has captured the mouse, this method has no effect.
    */
   void releaseCapture();
-
-  // Mozilla extensions
-  /**
-   * Requests that this element be made the full-screen element, as per the DOM
-   * full-screen api.
-   *
-   * @see <https://wiki.mozilla.org/index.php?title=Gecko:FullScreenAPI>
-   */
-  void mozRequestFullScreen();
 };

dom/xul/XULDocument.h

@@ -153,7 +153,6 @@ public:
     using nsDocument::SetTitle;
     using nsDocument::GetLastStyleSheetSet;
     using nsDocument::MozSetImageElement;
-    using nsDocument::GetMozFullScreenElement;
     using nsIDocument::GetLocation;
 
     // nsDocument interface overrides