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

third_party/WebKit/Source/core/html/HTMLInputElement.h

Index: third_party/WebKit/Source/core/html/HTMLInputElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLInputElement.h b/third_party/WebKit/Source/core/html/HTMLInputElement.h
index 7da175fac5aaf2e204bf7214cb3c10eb63d91514..0cf2b6d4a615380e721576b617c9233548353072 100644
--- a/third_party/WebKit/Source/core/html/HTMLInputElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLInputElement.h
@@ -267,6 +267,11 @@ public:
     bool isPlaceholderVisible() const override { return m_isPlaceholderVisible; }
     void setPlaceholderVisibility(bool) override;
 
+    void needUpdatePositionOfRadioGroup() const;
+    void setPositionInRadioGroup(unsigned position) { m_positonInRadio = position; }
+    unsigned positionInRadioGroup() const;
+    unsigned sizeOfRadioGroup() const;
+
 protected:
     HTMLInputElement(Document&, HTMLFormElement*, bool createdByParser);
 
@@ -377,6 +382,7 @@ private:
     int m_size;
     int m_maxLength;
     int m_minLength;
+    unsigned m_positonInRadio;

[keishi, 2016/02/16 02:22:46]

I think its ok to have code/API to support accedssibility features in core/. But
could we store the data in the accessibility module (ie  somewhere like
AXRadioButton). Maybe through something like
AXObjectCache::handlePositionInSetChange. This is only used for accessibility.

[je_julie(Not used), 2016/02/16 05:19:03]

Right. It'd better adding new AXRadioButton class to handle it.

     short m_maxResults;
     unsigned m_isChecked : 1;
     unsigned m_reflectsCheckedAttribute : 1;