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

ash/system/tray/hover_highlight_view.cc

 // Copyright 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 "ash/system/tray/hover_highlight_view.h"
 
 #include "ash/system/tray/fixed_sized_image_view.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/view_click_listener.h"
 #include "grit/ui_resources.h"
@@ skipping 129 matching lines @@
 void HoverHighlightView::GetAccessibleState(ui::AXViewState* state) {
   ActionableView::GetAccessibleState(state);
 
   if (checkable_) {
     state->role = ui::AX_ROLE_CHECK_BOX;
     if (checked_)
       state->AddStateFlag(ui::AX_STATE_CHECKED);
   }
 }
 
-gfx::Size HoverHighlightView::GetPreferredSize() {
+gfx::Size HoverHighlightView::GetPreferredSize() const {
   gfx::Size size = ActionableView::GetPreferredSize();
   if (!expandable_ || size.height() < kTrayPopupItemHeight)
     size.set_height(kTrayPopupItemHeight);
   return size;
 }
 
-int HoverHighlightView::GetHeightForWidth(int width) {
+int HoverHighlightView::GetHeightForWidth(int width) const {
   return GetPreferredSize().height();
 }
 
 void HoverHighlightView::OnMouseEntered(const ui::MouseEvent& event) {
   hover_ = true;
   if (text_highlight_color_ && text_label_)
     text_label_->SetEnabledColor(text_highlight_color_);
   SchedulePaint();
 }
 
@@ skipping 12 matching lines @@
 void HoverHighlightView::OnPaintBackground(gfx::Canvas* canvas) {
   canvas->DrawColor(hover_ ? highlight_color_ : default_color_);
 }
 
 void HoverHighlightView::OnFocus() {
   ScrollRectToVisible(gfx::Rect(gfx::Point(), size()));
   ActionableView::OnFocus();
 }
 
 }  // namespace ash