Move Web-facing fullscreen APIs to DocumentFullscreen and ElementFullscreen

Source/web/tests/WebFrameTest.cpp

Index: Source/web/tests/WebFrameTest.cpp
diff --git a/Source/web/tests/WebFrameTest.cpp b/Source/web/tests/WebFrameTest.cpp
index c03922caf383c0d5a2ab84d3457a1d6476081135..bee2a64c314a65bdf49fae22dc35cd5077ce5590 100644
--- a/Source/web/tests/WebFrameTest.cpp
+++ b/Source/web/tests/WebFrameTest.cpp
@@ -5541,7 +5541,7 @@ TEST_F(WebFrameTest, FullscreenLayerNonScrollable)
     Document* document = toWebLocalFrameImpl(webViewImpl->mainFrame())->frame()->document();
     blink::UserGestureIndicator gesture(blink::DefinitelyProcessingUserGesture);
     Element* divFullscreen = document->getElementById("div1");
-    divFullscreen->webkitRequestFullscreen();
+    FullscreenElementStack::from(*document).requestFullScreenForElement(*divFullscreen, FullscreenElementStack::PrefixedRequest);
     webViewImpl->willEnterFullScreen();
     webViewImpl->didEnterFullScreen();
     webViewImpl->layout();
@@ -5573,7 +5573,7 @@ TEST_F(WebFrameTest, FullscreenMainFrameScrollable)
 
     Document* document = toWebLocalFrameImpl(webViewImpl->mainFrame())->frame()->document();
     blink::UserGestureIndicator gesture(blink::DefinitelyProcessingUserGesture);
-    document->documentElement()->webkitRequestFullscreen();
+    FullscreenElementStack::from(*document).requestFullScreenForElement(*document->documentElement(), FullscreenElementStack::PrefixedRequest);
     webViewImpl->willEnterFullScreen();
     webViewImpl->didEnterFullScreen();
     webViewImpl->layout();