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

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

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/html/HTMLVideoElement.h"
 
 #include <memory>
 
 #include "core/dom/Fullscreen.h"
 #include "core/dom/UserGestureIndicator.h"
@@ skipping 38 matching lines @@
 
   HTMLVideoElement* VideoElement() {
     return toHTMLVideoElement(GetDocument().QuerySelector("video"));
   }
 
   HTMLDivElement* DivElement() {
     return toHTMLDivElement(GetDocument().QuerySelector("div"));
   }
 
   Element* FullscreenElement() {
-    return Fullscreen::CurrentFullScreenElementFrom(GetDocument());
+    return Fullscreen::FullscreenElementFrom(GetDocument());
   }
 
   MockChromeClient& GetMockChromeClient() { return *chrome_client_; }
 
   void SimulateDidEnterFullscreen() {
     Fullscreen::FromIfExists(GetDocument())->DidEnterFullscreen();
   }
 
   void SimulateDidExitFullscreen() {
     Fullscreen::FromIfExists(GetDocument())->DidExitFullscreen();
@@ skipping 248 matching lines @@
       UserGestureToken::Create(&GetDocument()));
   Fullscreen::RequestFullscreen(*DivElement());
   SimulateDidEnterFullscreen();
   EXPECT_EQ(FullscreenElement(), DivElement());
 
   SimulateBecamePersistentVideo(true);
   EXPECT_FALSE(GetDocument().body()->ContainsPersistentVideo());
 }
 
 }  // namespace blink