views: call UpdateAfterChange() in Textfield::InsertOrReplaceText().

ui/views/controls/textfield/textfield.h

Index: ui/views/controls/textfield/textfield.h
diff --git a/ui/views/controls/textfield/textfield.h b/ui/views/controls/textfield/textfield.h
index 21dcca1a578fd0b1d316d46510e8f17aded8487b..d59a1f9187af67a0b23112a28ba88a5973d108d2 100644
--- a/ui/views/controls/textfield/textfield.h
+++ b/ui/views/controls/textfield/textfield.h
@@ -89,6 +89,9 @@ class VIEWS_EXPORT Textfield : public View,
   void AppendText(const base::string16& new_text);
 
   // Inserts |new_text| at the cursor position, replacing any selected text.
+  // This method is used to handle user input via paths Textfield doesn't
+  // normally handle, so it calls UpdateAfterChange() and notifies observers of
+  // changes.
   void InsertOrReplaceText(const base::string16& new_text);
 
   // Returns the text that is currently selected. Call sites should take care to