Make `getComputedStyle` return the correct style for collapsed <img> elements.

third_party/WebKit/Source/core/html/HTMLImageElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLImageElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLImageElement.cpp b/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
index 84a2646a0ba38acb65324f0e90636061ac38ca3b..80c4369931ae3a77906b1736e7b54b7fec49da31 100644
--- a/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
@@ -333,11 +333,6 @@ ImageCandidate HTMLImageElement::findBestFitImageFromPictureParent() {
   return ImageCandidate();
 }
 
-bool HTMLImageElement::layoutObjectIsNeeded(const ComputedStyle& style) {
-  return m_layoutDisposition != LayoutDisposition::Collapsed &&
-         HTMLElement::layoutObjectIsNeeded(style);
-}
-
 LayoutObject* HTMLImageElement::createLayoutObject(const ComputedStyle& style) {
   const ContentData* contentData = style.contentData();
   if (contentData && contentData->isImage()) {
@@ -366,7 +361,6 @@ LayoutObject* HTMLImageElement::createLayoutObject(const ComputedStyle& style) {
 
 void HTMLImageElement::attachLayoutTree(const AttachContext& context) {
   HTMLElement::attachLayoutTree(context);
-
   if (layoutObject() && layoutObject()->isImage()) {
     LayoutImage* layoutImage = toLayoutImage(layoutObject());
     LayoutImageResource* layoutImageResource = layoutImage->imageResource();
@@ -852,6 +846,10 @@ void HTMLImageElement::ensurePrimaryContent() {
   setLayoutDisposition(LayoutDisposition::PrimaryContent);
 }
 
+bool HTMLImageElement::isCollapsed() const {
+  return m_layoutDisposition == LayoutDisposition::Collapsed;
+}
+
 void HTMLImageElement::setLayoutDisposition(LayoutDisposition layoutDisposition,
                                             bool forceReattach) {
   if (m_layoutDisposition == layoutDisposition && !forceReattach)