MacViews: Implement Force Touch/Mac dictionary lookup for Textfields.

ui/views/controls/textfield/textfield.cc

Index: ui/views/controls/textfield/textfield.cc
diff --git a/ui/views/controls/textfield/textfield.cc b/ui/views/controls/textfield/textfield.cc
index 4642d23fc89a89633cc84ff72fbb5011959a7b9d..1a1f3add1374b8fc74e3ef44215bce1cd9bf3389 100644
--- a/ui/views/controls/textfield/textfield.cc
+++ b/ui/views/controls/textfield/textfield.cc
@@ -649,6 +649,10 @@ void Textfield::OnMouseReleased(const ui::MouseEvent& event) {
   OnAfterUserAction();
 }
 
+WordLookupClient* Textfield::GetWordLookupClient() {
+  return this;
+}
+
 bool Textfield::OnKeyPressed(const ui::KeyEvent& event) {
   ui::TextEditCommand edit_command = scheduled_text_edit_command_;
   scheduled_text_edit_command_ = ui::TextEditCommand::INVALID_COMMAND;
@@ -1097,6 +1101,16 @@ bool Textfield::CanStartDragForView(View* sender,
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// Textfield, WordLookupClient overrides:
+
+bool Textfield::GetDecoratedWordAtPoint(const gfx::Point& point,
+                                        gfx::DecoratedText* decorated_word,
+                                        gfx::Point* baseline_point) {
+  return GetRenderText()->GetDecoratedWordAtPoint(point, decorated_word,
+                                                  baseline_point);
+}
+
+////////////////////////////////////////////////////////////////////////////////
 // Textfield, ui::TouchEditable overrides:
 
 void Textfield::SelectRect(const gfx::Point& start, const gfx::Point& end) {