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

third_party/WebKit/Source/core/css/resolver/SharedStyleFinder.cpp

Index: third_party/WebKit/Source/core/css/resolver/SharedStyleFinder.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/SharedStyleFinder.cpp b/third_party/WebKit/Source/core/css/resolver/SharedStyleFinder.cpp
index 27dc1c6c58c3e139f572f5bbfcee5b5c120a0c70..6c0529d8398a6af248d1e0b841d7f70320b7fbf0 100644
--- a/third_party/WebKit/Source/core/css/resolver/SharedStyleFinder.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/SharedStyleFinder.cpp
@@ -45,6 +45,7 @@
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/InsertionPoint.h"
 #include "core/html/HTMLElement.h"
+#include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLOptGroupElement.h"
 #include "core/html/HTMLOptionElement.h"
@@ -286,6 +287,12 @@ bool SharedStyleFinder::canShareStyleWithElement(Element& candidate) const {
   if (candidate.isHTMLElement() && toHTMLElement(candidate).hasDirectionAuto())
     return false;
 
+  if (isHTMLImageElement(candidate) && isHTMLImageElement(element()) &&
+      toHTMLImageElement(candidate).isCollapsed() !=
+          toHTMLImageElement(element()).isCollapsed()) {
+    return false;
+  }
+
   if (candidate.isLink() && m_context.elementLinkState() != style->insideLink())
     return false;