Implement ThreadedInputConnection.deleteSurroundingTextInCodePoints()

third_party/WebKit/public/web/WebLocalFrame.h

Index: third_party/WebKit/public/web/WebLocalFrame.h
diff --git a/third_party/WebKit/public/web/WebLocalFrame.h b/third_party/WebKit/public/web/WebLocalFrame.h
index f050d490dd9197213ed04c824bd90ff9fcd62161..8253889d7160f6d1980d8b08720cd379ab41eff5 100644
--- a/third_party/WebKit/public/web/WebLocalFrame.h
+++ b/third_party/WebKit/public/web/WebLocalFrame.h
@@ -316,8 +316,14 @@ class WebLocalFrame : public WebFrame {
   // Replaces the selection with the input string.
   virtual void replaceSelection(const WebString&) = 0;
   // 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.
   virtual void deleteSurroundingText(int before, int after) = 0;
+  // A variant of deleteSurroundingText(int, int). Major differences are:
+  // 1. The lengths are supplied in code points, not in Java chars or in glyphs.
+  // 2. This method does nothing if there are one or more invalid surrogate
+  // pairs in the requested range.
+  virtual void deleteSurroundingTextInCodePoints(int before, int after) = 0;
 
   // Spell-checking support -------------------------------------------------
   virtual void replaceMisspelledRange(const WebString&) = 0;