Implement ThreadedInputConnection.deleteSurroundingTextInCodePoints()

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index 86c7d56f0bba86c9b7c03fd2db88fbf07656ae6b..5e6bf0f1947a0c197865e9a933156b441288b293 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -463,9 +463,16 @@ class CONTENT_EXPORT RenderFrameHostImpl
   void ExtendSelectionAndDelete(size_t before, size_t after);
 
   // Deletes text before and after the current cursor position, excluding the
-  // selection.
+  // selection. The lengths are supplied in Java chars, not in code points or in
+  // glyphs.
   void DeleteSurroundingText(size_t before, size_t after);
 
+  // Deletes text before and after the current cursor position, excluding the
+  // selection. The lengths are supplied in code points, not in Java chars or in
+  // glyphs. Do nothing if there are one or more invalid surrogate pairs in the
+  // requested range.
+  void DeleteSurroundingTextInCodePoints(size_t before, size_t after);
+
   // Notifies the RenderFrame that the JavaScript message that was shown was
   // closed by the user.
   void JavaScriptDialogClosed(IPC::Message* reply_msg,