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

ui/views/view.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.
 
 #define _USE_MATH_DEFINES // For VC++ to get M_PI. This has to be first.
 
 #include "ui/views/view.h"
 
 #include <algorithm>
 #include <cmath>
@@ skipping 1062 matching lines @@
 
 ViewTargeter* View::GetEffectiveViewTargeter() const {
   DCHECK(GetWidget());
   ViewTargeter* view_targeter = targeter();
   if (!view_targeter)
     view_targeter = GetWidget()->GetRootView()->targeter();
   CHECK(view_targeter);
   return view_targeter;
 }
 
+WordLookupClient* View::GetWordLookupClient() {
+  return nullptr;
+}
+
 bool View::CanAcceptEvent(const ui::Event& event) {
   return IsDrawn();
 }
 
 ui::EventTarget* View::GetParentTarget() {
   return parent_;
 }
 
 std::unique_ptr<ui::EventTargetIterator> View::GetChildIterator() const {
   return base::MakeUnique<ui::EventTargetIteratorImpl<View>>(children_);
@@ skipping 1325 matching lines @@
   // Message the RootView to do the drag and drop. That way if we're removed
   // the RootView can detect it and avoid calling us back.
   gfx::Point widget_location(event.location());
   ConvertPointToWidget(this, &widget_location);
   widget->RunShellDrag(this, data, widget_location, drag_operations, source);
   // WARNING: we may have been deleted.
   return true;
 }
 
 }  // namespace views