Declares GetHeightForWidth() for those who need it.

ash/system/tray/tray_item_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.
 
 #include "ash/system/tray/tray_item_view.h"
 
 #include "ash/shelf/shelf_types.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "ui/base/animation/slide_animation.h"
@@ skipping 72 matching lines @@
     size.set_height(kTrayIconHeight);
   else
     size.set_width(kTrayIconWidth);
   if (!animation_.get() || !animation_->is_animating())
     return size;
   size.set_width(std::max(1,
       static_cast<int>(size.width() * animation_->GetCurrentValue())));
   return size;
 }
 
+int TrayItemView::GetHeightForWidth(int width) {
+  return GetPreferredSize().height();
+}
+
 void TrayItemView::ChildPreferredSizeChanged(views::View* child) {
   PreferredSizeChanged();
 }
 
 void TrayItemView::AnimationProgressed(const ui::Animation* animation) {
   gfx::Transform transform;
   transform.Translate(0, animation->CurrentValueBetween(
       static_cast<double>(height()) / 2, 0.));
   transform.Scale(animation->GetCurrentValue(),
                   animation->GetCurrentValue());
   layer()->SetTransform(transform);
   PreferredSizeChanged();
 }
 
 void TrayItemView::AnimationEnded(const ui::Animation* animation) {
   if (animation->GetCurrentValue() < 0.1)
     views::View::SetVisible(false);
 }
 
 void TrayItemView::AnimationCanceled(const ui::Animation* animation) {
   AnimationEnded(animation);
 }
 
 }  // namespace internal
 }  // namespace ash