Reland "Sync requestFullscreen() and exitFullscreen() algorithms with the spec"

third_party/WebKit/Source/core/html/HTMLVideoElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp b/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
index 580cbebb21bbda358e342abc62af09586e6f734e..3bd027f0268851fb0a3fced62fdd8b225bd4a21f 100644
--- a/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
@@ -256,7 +256,7 @@ void HTMLVideoElement::OnBecamePersistentVideo(bool value) {
       histogram.Count(kVideoPersistenceControlsTypeCustom);
 
     Element* fullscreen_element =
-        Fullscreen::CurrentFullScreenElementFrom(GetDocument());
+        Fullscreen::FullscreenElementFrom(GetDocument());
     // Only set the video in persistent mode if it is not using native controls
     // and is currently fullscreen.
     if (!fullscreen_element || IsFullscreen())
@@ -280,7 +280,7 @@ void HTMLVideoElement::OnBecamePersistentVideo(bool value) {
     PseudoStateChanged(CSSSelector::kPseudoVideoPersistent);
 
     Element* fullscreen_element =
-        Fullscreen::CurrentFullScreenElementFrom(GetDocument());
+        Fullscreen::FullscreenElementFrom(GetDocument());
     // If the page is no longer fullscreen, the full tree will have to be
     // traversed to make sure things are cleaned up.
     for (Element* element = this; element && element != fullscreen_element;