Add a new code/message path for moving an insertion handle

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index 1d8e4df33a79cf06617aa9676fd2c9bce1fb0a18..823208aeb89e5f9608b8873005a8cd3933cf6c8c 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -368,6 +368,9 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   // Requests the renderer to select the region between two points.
   void SelectRange(const gfx::Point& start, const gfx::Point& end);
 
+  // Requests the renderer to move the caret selection towards the point.
+  void MoveCaret(const gfx::Point& point);
+
   // Called when the reponse to a pending mouse lock request has arrived.
   // Returns true if |allowed| is true and the mouse has been successfully
   // locked.
@@ -561,6 +564,7 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
       int gesture_id,
       const ViewHostMsg_BeginSmoothScroll_Params &params);
   void OnSelectRangeAck();
+  void OnMsgMoveCaretAck();
   virtual void OnFocus();
   virtual void OnBlur();
   void OnHasTouchEventHandlers(bool has_handlers);
@@ -762,6 +766,12 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   };
   scoped_ptr<SelectionRange> next_selection_range_;
 
+  // (Similar to |mouse_move_pending_|.) True while waiting for MoveCaret_ACK.
+  bool move_caret_pending_;
+
+  // (Similar to |next_mouse_move_|.) The next MoveCaret to send, if any.
+  scoped_ptr<gfx::Point> next_move_caret_;
+
   // The time when an input event was sent to the RenderWidget.
   base::TimeTicks input_event_start_time_;