Make sure Document::updateLayoutTree*() is called before Element::isFocusable().

third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp

Index: third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp b/third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp
index 06aafbcab4efdc8f313282d56e07b9c5c912143a..e8a60d8448656def99306770033d35ec740fedf0 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp
@@ -518,8 +518,11 @@ AccessibilityRole AXNodeObject::determineAccessibilityRole()
         return role;
     if (node()->isElementNode()) {
         Element* element = toElement(node());
-        if (element->isInCanvasSubtree() && element->isFocusable())
-            return GroupRole;
+        if (element->isInCanvasSubtree()) {
+            document()->updateLayoutTreeIgnorePendingStylesheets();
+            if (element->isFocusable())
+                return GroupRole;
+        }
     }
     return UnknownRole;
 }