Revert of Reland r165710 "Replace RenderFullScreen with top layer"

Source/core/rendering/RenderInline.cpp

Index: Source/core/rendering/RenderInline.cpp
diff --git a/Source/core/rendering/RenderInline.cpp b/Source/core/rendering/RenderInline.cpp
index 7ddd169949a5ba323cef880bddd90e4aa98af48c..280a5a89f94ad814b2969eb38bd2fffb49cd4184 100644
--- a/Source/core/rendering/RenderInline.cpp
+++ b/Source/core/rendering/RenderInline.cpp
@@ -32,6 +32,7 @@
 #include "core/rendering/LayoutRectRecorder.h"
 #include "core/rendering/RenderBlock.h"
 #include "core/rendering/RenderFlowThread.h"
+#include "core/rendering/RenderFullScreen.h"
 #include "core/rendering/RenderGeometryMap.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderTheme.h"
@@ -344,6 +345,17 @@
     // Create a clone of this inline.
     RenderInline* cloneInline = clone();
     cloneInline->setContinuation(oldCont);
+
+    // If we're splitting the inline containing the fullscreened element,
+    // |beforeChild| may be the renderer for the fullscreened element. However,
+    // that renderer is wrapped in a RenderFullScreen, so |this| is not its
+    // parent. Since the splitting logic expects |this| to be the parent, set
+    // |beforeChild| to be the RenderFullScreen.
+    if (FullscreenElementStack* fullscreen = FullscreenElementStack::fromIfExists(&document())) {
+        const Element* fullScreenElement = fullscreen->webkitCurrentFullScreenElement();
+        if (fullScreenElement && beforeChild && beforeChild->node() == fullScreenElement)
+            beforeChild = fullscreen->fullScreenRenderer();
+    }
 
     // Now take all of the children from beforeChild to the end and remove
     // them from |this| and place them in the clone.