Implements the ability to get and set the caret position and the current selection from anywhere in…

public/web/WebAXObject.h

Index: public/web/WebAXObject.h
diff --git a/public/web/WebAXObject.h b/public/web/WebAXObject.h
index 3d608c2882e5a409ac4580d3b02635bbb9ee5bd9..0f45e2e01e2bd2457c327eef3193138aeef526a0 100644
--- a/public/web/WebAXObject.h
+++ b/public/web/WebAXObject.h
@@ -156,6 +156,15 @@ public:
     BLINK_EXPORT WebString language() const;
     BLINK_EXPORT WebAXOrientation orientation() const;
     BLINK_EXPORT WebAXRole role() const;
+    // The following selection functions get or set the global document
+    // selection and can be called on any object in the tree.
+    BLINK_EXPORT void selection(WebAXObject& anchorObject, int& anchorOffset,
+        WebAXObject& focusObject, int& focusOffset) const;
+    BLINK_EXPORT void setSelection(const WebAXObject& anchorObject, int anchorOffset,
+        const WebAXObject& focusObject, int focusOffset) const;
+    // The following selection functions return text offsets calculated starting
+    // the current object. They only report on a selection that is placed on
+    // the current object or on any of its descendants.
     BLINK_EXPORT unsigned selectionEnd() const;
     BLINK_EXPORT unsigned selectionEndLineNumber() const;
     BLINK_EXPORT unsigned selectionStart() const;