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

ash/shelf/overflow_bubble_view.cc

 // Copyright 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 "ash/shelf/overflow_bubble_view.h"
 
 #include <algorithm>
 
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_constants.h"
@@ skipping 90 matching lines @@
 void OverflowBubbleView::ScrollByYOffset(int y_offset) {
   const gfx::Rect visible_bounds(GetContentsBounds());
   const gfx::Size contents_size(GetContentsSize());
 
   DCHECK_GE(contents_size.width(), visible_bounds.width());
   int y = std::min(contents_size.height() - visible_bounds.height(),
                    std::max(0, scroll_offset_.y() + y_offset));
   scroll_offset_.set_y(y);
 }
 
-gfx::Size OverflowBubbleView::GetPreferredSize() {
+gfx::Size OverflowBubbleView::GetPreferredSize() const {
   gfx::Size preferred_size = GetContentsSize();
 
   const gfx::Rect monitor_rect = Shell::GetScreen()->GetDisplayNearestPoint(
       GetAnchorRect().CenterPoint()).work_area();
   if (!monitor_rect.IsEmpty()) {
     if (IsHorizontalAlignment()) {
       preferred_size.set_width(std::min(
           preferred_size.width(),
           static_cast<int>(monitor_rect.width() *
                            kMaxBubbleSizeToScreenRatio)));
@@ skipping 92 matching lines @@
 
     bubble_rect.Offset(0, offset);
     border->set_arrow_offset(anchor_rect.CenterPoint().y() - bubble_rect.y());
   }
 
   GetBubbleFrameView()->SchedulePaint();
   return bubble_rect;
 }
 
 }  // namespace ash