Manky attempt with TextInputClient

ui/accessibility/platform/ax_platform_node_delegate.h

Index: ui/accessibility/platform/ax_platform_node_delegate.h
diff --git a/ui/accessibility/platform/ax_platform_node_delegate.h b/ui/accessibility/platform/ax_platform_node_delegate.h
index 11cf9cec58f6d38f2b0b52a7daeef61dcb4fc04e..ef6f0c54b3c2a6e51e59ba23fcc46cd7610ef3c4 100644
--- a/ui/accessibility/platform/ax_platform_node_delegate.h
+++ b/ui/accessibility/platform/ax_platform_node_delegate.h
@@ -16,6 +16,7 @@ struct AXActionData;
 struct AXNodeData;
 struct AXTreeData;
 class AXPlatformNode;
+class TextInputClient;
 
 // An object that wants to be accessible should derive from this class.
 // AXPlatformNode subclasses use this interface to query all of the information
@@ -56,6 +57,10 @@ class AX_EXPORT AXPlatformNodeDelegate {
   // Get the bounds of this node in screen coordinates.
   virtual gfx::Rect GetScreenBoundsRect() const = 0;
 
+  // Get the TextInputClient, if there is one for this element. When available,
+  // this can provide detailed properties for text in this node.
+  virtual TextInputClient* GetTextInputClient() const = 0;
+
   // Do a *synchronous* hit test of the given location in global screen
   // coordinates, and the node within this node's subtree (inclusive) that's
   // hit, if any.