posinset and setsize for input type, radio, exposed in AX tree

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

Index: third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp b/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
index 18cb7f157e6a1fb4740a695867431d2b414ee637..b245e4fce96d749cb6b022236d06d1e323461ec3 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
@@ -65,6 +65,7 @@
 #include "modules/accessibility/AXMenuListOption.h"
 #include "modules/accessibility/AXMenuListPopup.h"
 #include "modules/accessibility/AXProgressIndicator.h"
+#include "modules/accessibility/AXRadioInput.h"
 #include "modules/accessibility/AXSVGRoot.h"
 #include "modules/accessibility/AXSlider.h"
 #include "modules/accessibility/AXSpinButton.h"
@@ -305,6 +306,9 @@ AXObject* AXObjectCacheImpl::createFromRenderer(LayoutObject* layoutObject)
     if (isHTMLOptionElement(node))
         return AXListBoxOption::create(layoutObject, *this);
 
+    if (isHTMLInputElement(node) && toHTMLInputElement(node)->isRadioButton())
+        return AXRadioInput::create(layoutObject, *this);
+
     if (layoutObject->isSVGRoot())
         return AXSVGRoot::create(layoutObject, *this);
 
@@ -932,6 +936,24 @@ void AXObjectCacheImpl::listboxActiveIndexChanged(HTMLSelectElement* select)
     toAXListBox(obj)->activeIndexChanged();
 }
 
+void AXObjectCacheImpl::radiobuttonRemovedFromGroup(HTMLInputElement* groupMember)
+{
+    AXObject* obj = get(groupMember);
+    if (!obj || !obj->isAXRadioInput())
+        return;
+
+    // The 'posInSet' and 'setSize' attributes should be updated from the first node,
+    // as the removed node is already detached from tree.
+    HTMLInputElement* firstRadio = toAXRadioInput(obj)->findFirstFocusableRadioButtonInGroup(groupMember);
+    AXObject* firstObj = get(firstRadio);
+    if (!firstObj || !firstObj->isAXRadioInput())
+        return;
+
+    toAXRadioInput(firstObj)->updatePosAndSetSize(1);
+    postNotification(firstObj, AXAriaAttributeChanged);
+    toAXRadioInput(firstObj)->requestUpdateToNextNode(true);
+}
+
 void AXObjectCacheImpl::handleLayoutComplete(LayoutObject* layoutObject)
 {
     if (!layoutObject)