Revert of ResizeObserver pt6: integration

third_party/WebKit/Source/core/dom/Element.cpp

Index: third_party/WebKit/Source/core/dom/Element.cpp
diff --git a/third_party/WebKit/Source/core/dom/Element.cpp b/third_party/WebKit/Source/core/dom/Element.cpp
index e6d6a34fdae7582492f59a39f81b934a0eebf9c9..66d497b9e899b3ef298489a85204ee7e08dec7f3 100644
--- a/third_party/WebKit/Source/core/dom/Element.cpp
+++ b/third_party/WebKit/Source/core/dom/Element.cpp
@@ -117,7 +117,6 @@
 #include "core/layout/api/LayoutBoxItem.h"
 #include "core/layout/api/LayoutViewItem.h"
 #include "core/loader/DocumentLoader.h"
-#include "core/observer/ResizeObservation.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/FocusController.h"
 #include "core/page/Page.h"
@@ -1639,8 +1638,6 @@
     if (svgFilterNeedsLayerUpdate())
         document().unscheduleSVGFilterLayerUpdateHack(*this);
 
-    setNeedsResizeObserverUpdate();
-
     DCHECK(needsAttach());
 }
 
@@ -2694,14 +2691,6 @@
 HeapHashMap<Member<ResizeObserver>, Member<ResizeObservation>>& Element::ensureResizeObserverData()
 {
     return ensureElementRareData().ensureResizeObserverData();
-}
-
-void Element::setNeedsResizeObserverUpdate()
-{
-    if (auto* data = resizeObserverData()) {
-        for (auto& observation : data->values())
-            observation->elementSizeChanged();
-    }
 }
 
 // Step 1 of http://domparsing.spec.whatwg.org/#insertadjacenthtml()