Get surrounding text from webkit. This CL is for sharing code only.

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 3bad78a5d109e9877a1035c282578a14e39d0517..bbb3dbceb6ef84fe59871019a650cdaacc2697f3 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -399,6 +399,16 @@ class RenderWidget : public IPC::Channel::Listener,
   // Stores the current text input type of |webwidget_|.
   ui::TextInputType text_input_type_;
 
+  // Stores the current surrounding text of |webwidget_|.
+  string16 surrounding_;
+  
+  // Stores the current cursor in surrounding text of |webwidget_|.
+  size_t cursor_;
+  
+  // Stores the current anchor in surrounding text of |webwidget_|.
+  size_t anchor_;
+  
+
   // Stores the current type of composition text rendering of |webwidget_|.
   bool can_compose_inline_;