Introduce the MicButtonTargeter class

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 1097 matching lines @@
 
 scoped_ptr<ui::EventTargetIterator> View::GetChildIterator() const {
   return scoped_ptr<ui::EventTargetIterator>(
       new ui::EventTargetIteratorImpl<View>(children_));
 }
 
 ui::EventTargeter* View::GetEventTargeter() {
   return targeter_.get();
 }
 
+const ui::EventTargeter* View::GetEventTargeter() const {
+  return targeter_.get();
+}
+
 void View::ConvertEventToTarget(ui::EventTarget* target,
                                 ui::LocatedEvent* event) {
   event->ConvertLocationToTarget(this, static_cast<View*>(target));
 }
 
 // Accelerators ----------------------------------------------------------------
 
 void View::AddAccelerator(const ui::Accelerator& accelerator) {
   if (!accelerators_.get())
     accelerators_.reset(new std::vector<ui::Accelerator>());
@@ skipping 1356 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