Implement ThreadedInputConnection.deleteSurroundingTextInCodePoints()

content/common/input_messages.h

Index: content/common/input_messages.h
diff --git a/content/common/input_messages.h b/content/common/input_messages.h
index 914440d6967bf1f8232a744606a836ec42a403f2..97f8c57fc462e662a383a6481767b012a2bc2d80 100644
--- a/content/common/input_messages.h
+++ b/content/common/input_messages.h
@@ -155,11 +155,20 @@ IPC_MESSAGE_ROUTED2(InputMsg_ExtendSelectionAndDelete,
                     int /* 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.
 IPC_MESSAGE_ROUTED2(InputMsg_DeleteSurroundingText,
                     int /* before */,
                     int /* 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
+IPC_MESSAGE_ROUTED2(InputMsg_DeleteSurroundingTextInCodePoints,
+                    int /* before */,
+                    int /* after */)
+
 // Selects between the given start and end offsets in the currently focused
 // editable field.
 IPC_MESSAGE_ROUTED2(InputMsg_SetEditableSelectionOffsets,