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

ui/views/controls/textfield/textfield.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/controls/textfield/textfield.h"
 
 #include <string>
 #include <utility>
 
 #include "base/trace_event/trace_event.h"
@@ skipping 540 matching lines @@
 gfx::Size Textfield::GetPreferredSize() const {
   const gfx::Insets& insets = GetInsets();
   return gfx::Size(GetFontList().GetExpectedTextWidth(default_width_in_chars_) +
                    insets.width(), GetFontList().GetHeight() + insets.height());
 }
 
 const char* Textfield::GetClassName() const {
   return kViewClassName;
 }
 
+gfx::RenderText* Textfield::GetRenderText() {
+  return static_cast<const Textfield*>(this)->GetRenderText();
+}
+
 gfx::NativeCursor Textfield::GetCursor(const ui::MouseEvent& event) {
   bool in_selection = GetRenderText()->IsPointInSelection(event.location());
   bool drag_event = event.type() == ui::ET_MOUSE_DRAGGED;
   bool text_cursor = !initiating_drag_ && (drag_event || !in_selection);
   return text_cursor ? GetNativeIBeamCursor() : gfx::kNullCursor;
 }
 
 bool Textfield::OnMousePressed(const ui::MouseEvent& event) {
   TrackMouseClicks(event);
 
@@ skipping 1456 matching lines @@
     RequestFocus();
   model_->MoveCursorTo(mouse);
   if (!selection_clipboard_text.empty()) {
     model_->InsertText(selection_clipboard_text);
     UpdateAfterChange(true, true);
   }
   OnAfterUserAction();
 }
 
 }  // namespace views