Implement FullScreen using top layer.

Source/core/layout/LayoutVideo.cpp

Index: Source/core/layout/LayoutVideo.cpp
diff --git a/Source/core/layout/LayoutVideo.cpp b/Source/core/layout/LayoutVideo.cpp
index 0dc2abe3237296e7b7f4171aa333c3f346cd001e..c54292bfc4acf6c6a58d4084460ac1592ce8b244 100644
--- a/Source/core/layout/LayoutVideo.cpp
+++ b/Source/core/layout/LayoutVideo.cpp
@@ -29,7 +29,6 @@
 #include "core/HTMLNames.h"
 #include "core/dom/Document.h"
 #include "core/html/HTMLVideoElement.h"
-#include "core/layout/LayoutFullScreen.h"
 #include "core/paint/VideoPainter.h"
 #include "public/platform/WebLayer.h"
 
@@ -203,47 +202,6 @@ bool LayoutVideo::supportsAcceleratedRendering() const
     return !!mediaElement()->platformLayer();
 }
 
-static const LayoutBlock* layoutObjectPlaceholder(const LayoutObject* layoutObject)
-{
-    LayoutObject* parent = layoutObject->parent();
-    if (!parent)
-        return nullptr;
-
-    LayoutFullScreen* fullScreen = parent->isLayoutFullScreen() ? toLayoutFullScreen(parent) : 0;
-    if (!fullScreen)
-        return nullptr;
-
-    return fullScreen->placeholder();
-}
-
-LayoutUnit LayoutVideo::offsetLeft() const
-{
-    if (const LayoutBlock* block = layoutObjectPlaceholder(this))
-        return block->offsetLeft();
-    return LayoutMedia::offsetLeft();
-}
-
-LayoutUnit LayoutVideo::offsetTop() const
-{
-    if (const LayoutBlock* block = layoutObjectPlaceholder(this))
-        return block->offsetTop();
-    return LayoutMedia::offsetTop();
-}
-
-LayoutUnit LayoutVideo::offsetWidth() const
-{
-    if (const LayoutBlock* block = layoutObjectPlaceholder(this))
-        return block->offsetWidth();
-    return LayoutMedia::offsetWidth();
-}
-
-LayoutUnit LayoutVideo::offsetHeight() const
-{
-    if (const LayoutBlock* block = layoutObjectPlaceholder(this))
-        return block->offsetHeight();
-    return LayoutMedia::offsetHeight();
-}
-
 CompositingReasons LayoutVideo::additionalCompositingReasons() const
 {
     HTMLMediaElement* element = toHTMLMediaElement(node());