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..24e8dfb4fafb045a431d840db4e3c8fd2b6962bf 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
@@ -29,6 +29,7 @@
 #include "modules/accessibility/AXObjectCacheImpl.h"
 
 #include "core/HTMLNames.h"
+#include "core/InputTypeNames.h"
 #include "core/dom/Document.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
@@ -65,6 +66,7 @@
 #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 +307,9 @@ AXObject* AXObjectCacheImpl::createFromRenderer(LayoutObject* layoutObject)
     if (isHTMLOptionElement(node))
         return AXListBoxOption::create(layoutObject, *this);
 
+    if (isHTMLInputElement(node) && toHTMLInputElement(node)->type() == InputTypeNames::radio)
+        return AXRadioInput::create(layoutObject, *this);
+
     if (layoutObject->isSVGRoot())
         return AXSVGRoot::create(layoutObject, *this);
 
@@ -932,6 +937,24 @@ 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)->findFirstRadioButtonInGroup(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)