MacViews: Extend TextInputClient protocol with support for editing commands.

ui/views/controls/prefix_selector.cc

Index: ui/views/controls/prefix_selector.cc
diff --git a/ui/views/controls/prefix_selector.cc b/ui/views/controls/prefix_selector.cc
index 6ac51fd2597a263755102e9e8cf6f780b4cbc46c..c901edd2c11688f563d97df87b23265c38c24f70 100644
--- a/ui/views/controls/prefix_selector.cc
+++ b/ui/views/controls/prefix_selector.cc
@@ -143,6 +143,13 @@ void PrefixSelector::OnCandidateWindowUpdated() {
 void PrefixSelector::OnCandidateWindowHidden() {
 }
 
+bool PrefixSelector::IsEditingCommandEnabled(int command_id) {
+  return false;
+}
+
+void PrefixSelector::ExecuteEditingCommand(int command_id) {
+}
+
 void PrefixSelector::OnTextInput(const base::string16& text) {
   // Small hack to filter out 'tab' and 'enter' input, as the expectation is
   // that they are control characters and will not affect the currently-active