Expose InlineTextBoxes in the accessibility tree.

Source/core/rendering/RenderText.h

Index: Source/core/rendering/RenderText.h
diff --git a/Source/core/rendering/RenderText.h b/Source/core/rendering/RenderText.h
index 76f0d4e8242383d81dd25287b4bf5fce5dc83797..108b74cbcf3a594f8604466355642cc40fbaba27 100644
--- a/Source/core/rendering/RenderText.h
+++ b/Source/core/rendering/RenderText.h
@@ -25,9 +25,11 @@
 
 #include "core/rendering/RenderObject.h"
 #include "wtf/Forward.h"
+#include "wtf/PassRefPtr.h"
 
 namespace WebCore {
 
+class AbstractInlineTextBox;
 class InlineTextBox;
 
 class RenderText : public RenderObject {
@@ -142,6 +144,8 @@ public:
 
     void removeAndDestroyTextBoxes();
 
+    PassRefPtr<AbstractInlineTextBox> firstAbstractInlineTextBox();
+
 protected:
     virtual void computePreferredLogicalWidths(float leadWidth);
     virtual void willBeDestroyed();