[GTK][GStreamer] FullscreenVideoControllerGtk implementation
https://bugs.webkit.org/show_bug.cgi?id=107398

Reviewed by Gustavo Noronha Silva.

Source/WebCore:

NATIVE_FULLSCREEN_VIDEO support for the GTK port. The previous
FullscreenVideoController implementation was refactored as a
sub-class of FullscreenVideoControllerGStreamer and hooked in the
MediaPlayerPrivateGStreamer backend.

* GNUmakefile.list.am:
* platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp:
(WebCore::MediaPlayerPrivateGStreamer::~MediaPlayerPrivateGStreamer):
* platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h:
* platform/graphics/gtk/FullscreenVideoControllerGtk.cpp: Renamed from Source/WebKit/gtk/WebCoreSupport/FullscreenVideoController.cpp.
* platform/graphics/gtk/FullscreenVideoControllerGtk.h: Renamed from Source/WebKit/gtk/WebCoreSupport/FullscreenVideoController.h.

Source/WebKit/gtk:

Remove the FullscreenVideoController as it moved to
FullscreenVideoControllerGStreamer and its Gtk subclass in
WebCore. Hook in NATIVE_FULLSCREEN_VIDEO in the ChromeClient in
the two possible scenarios, wether FULLSCREEN_API is enabled or not.

* GNUmakefile.am: Remove FullscreenVideoController.
* WebCoreSupport/ChromeClientGtk.cpp:
(WebKit):
(WebKit::ChromeClient::enterFullscreenForNode): Hook
NATIVE_FULLSCREEN_VIDEO support.
(WebKit::ChromeClient::exitFullscreenForNode): Ditto
(WebKit::ChromeClient::enterFullScreenForElement): Ditto
(WebKit::ChromeClient::exitFullScreenForElement): Ditto
* WebCoreSupport/ChromeClientGtk.h:
(ChromeClient):
* WebCoreSupport/FullscreenVideoController.cpp: Removed.
* WebCoreSupport/FullscreenVideoController.h: Removed.
* webkit/webkitwebview.cpp: Remove FullscreenVideoController support.
* webkit/webkitwebviewprivate.h: Ditto

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@141566 268f45cc-cd09-0410-ab3c-d52691b4dbfc