Hoist layout update out of SVGGraphicsElement::GetBBox and overrides

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

Index: third_party/WebKit/Source/core/dom/ResizeObservation.cpp
diff --git a/third_party/WebKit/Source/core/dom/ResizeObservation.cpp b/third_party/WebKit/Source/core/dom/ResizeObservation.cpp
index d1d201479c5f77e45fb80d4ce6f80e8849bfbcce..916aa3297d4cb518781bf904d9942aa4e2262dff 100644
--- a/third_party/WebKit/Source/core/dom/ResizeObservation.cpp
+++ b/third_party/WebKit/Source/core/dom/ResizeObservation.cpp
@@ -38,14 +38,15 @@ size_t ResizeObservation::TargetDepth() {
 
 LayoutSize ResizeObservation::ComputeTargetSize() const {
   if (target_) {
-    if (target_->IsSVGElement() &&
-        ToSVGElement(target_)->IsSVGGraphicsElement()) {
-      SVGGraphicsElement& svg = ToSVGGraphicsElement(*target_);
-      return LayoutSize(svg.GetBBox().Size());
+    if (LayoutObject* layout_object = target_->GetLayoutObject()) {
+      if (target_->IsSVGElement() &&
+          ToSVGElement(target_)->IsSVGGraphicsElement()) {
+        SVGGraphicsElement& svg = ToSVGGraphicsElement(*target_);
+        return LayoutSize(svg.GetBBox().Size());
+      }
+      if (layout_object->IsBox())
+        return ToLayoutBox(layout_object)->ContentSize();
     }
-    LayoutBox* layout = target_->GetLayoutBox();
-    if (layout)
-      return layout->ContentSize();
   }
   return LayoutSize();
 }