views: Make view::Views::GetPreferredSize() const.

ui/views/touchui/touch_selection_controller_impl.cc

 // Copyright (c) 2013 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/touchui/touch_selection_controller_impl.h"
 
 #include "base/time/time.h"
 #include "grit/ui_resources.h"
 #include "grit/ui_strings.h"
 #include "ui/aura/client/cursor_client.h"
@@ skipping 213 matching lines @@
       case ui::ET_GESTURE_SCROLL_END:
       case ui::ET_SCROLL_FLING_START:
         widget_->ReleaseCapture();
         controller_->SetDraggingHandle(NULL);
         break;
       default:
         break;
     }
   }
 
-  virtual gfx::Size GetPreferredSize() OVERRIDE {
+  virtual gfx::Size GetPreferredSize() const OVERRIDE {
     gfx::Size image_size = GetHandleImageSize();
     return gfx::Size(image_size.width() + 2 * kSelectionHandleHorizPadding,
                      image_size.height() + selection_rect_.height() +
                          kSelectionHandleVertPadding);
   }
 
   bool IsWidgetVisible() const {
     return widget_->IsVisible();
   }
 
@@ skipping 377 matching lines @@
 
 bool TouchSelectionControllerImpl::IsSelectionHandle2Visible() {
   return selection_handle_2_->IsWidgetVisible();
 }
 
 bool TouchSelectionControllerImpl::IsCursorHandleVisible() {
   return cursor_handle_->IsWidgetVisible();
 }
 
 }  // namespace views