Revert of Reland "Implement FullScreen using top layer."

third_party/WebKit/Source/web/FullscreenController.cpp

Index: third_party/WebKit/Source/web/FullscreenController.cpp
diff --git a/third_party/WebKit/Source/web/FullscreenController.cpp b/third_party/WebKit/Source/web/FullscreenController.cpp
index 1d0f0fcc1cfe818faf7921877ab15ccf4eba3ca6..53c7cbcb2350a480b61090f6c674cbd59eb564a7 100644
--- a/third_party/WebKit/Source/web/FullscreenController.cpp
+++ b/third_party/WebKit/Source/web/FullscreenController.cpp
@@ -37,6 +37,7 @@
 #include "core/frame/PageScaleConstraintsSet.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/html/HTMLVideoElement.h"
+#include "core/layout/LayoutFullScreen.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "public/platform/WebLayerTreeView.h"
 #include "public/web/WebFrameClient.h"
@@ -130,13 +131,6 @@ void FullscreenController::didExitFullscreen()
 
 void FullscreenController::enterFullScreenForElement(Element* element)
 {
-    // TODO(dsinclair): This should not be needed because we addToTopLayer
-    // in Fullscreen::pushFullscreenElementStack but, the WebView code doesn't
-    // call Fullscreen::requestFullscreen() and, instead, just enters and
-    // exists itself. This should be unified so there is one way to go
-    // fullscreen.  crbug.com/538158
-    element->document().addToTopLayer(element);
-
     // We are already transitioning to fullscreen for a different element.
     if (m_provisionalFullScreenElement) {
         m_provisionalFullScreenElement = element;
@@ -174,13 +168,6 @@ void FullscreenController::exitFullScreenForElement(Element* element)
 {
     DCHECK(element);
 
-    // TODO(dsinclair): This should not be needed because we addToTopLayer
-    // in Fullscreen::popFullscreenElementStack but, the WebView code doesn't
-    // call Fullscreen::requestFullscreen() and, instead, just enters and
-    // exists itself. This should be unified so there is one way to go
-    // fullscreen.  crbug.com/538158
-    element->document().removeFromTopLayer(element);
-
     // The client is exiting full screen, so don't send a notification.
     if (m_isCancelingFullScreen)
         return;
@@ -197,9 +184,9 @@ void FullscreenController::updateSize()
 
     updatePageScaleConstraints(false);
 
-    Document* document = m_fullScreenFrame->document();
-    if (Element* fullscreenElement = Fullscreen::currentFullScreenElementFrom(*document))
-        Fullscreen::from(fullscreenElement->document()).didUpdateSize(*fullscreenElement);
+    LayoutFullScreen* layoutObject = Fullscreen::from(*m_fullScreenFrame->document()).fullScreenLayoutObject();
+    if (layoutObject)
+        layoutObject->updateStyle();
 }
 
 void FullscreenController::didUpdateLayout()