views::ImageButton: Added SetMinimumImageSize; removed SetPreferredSize.

ash/system/audio/volume_view.cc

 // Copyright 2014 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/audio/volume_view.h"
 
 #include "ash/ash_constants.h"
 #include "ash/shell.h"
 #include "ash/system/audio/tray_audio.h"
 #include "ash/system/audio/tray_audio_delegate.h"
@@ skipping 29 matching lines @@
 class VolumeButton : public views::ToggleImageButton {
  public:
    VolumeButton(views::ButtonListener* listener,
                 system::TrayAudioDelegate* audio_delegate)
       : views::ToggleImageButton(listener),
         audio_delegate_(audio_delegate),
         image_index_(-1) {
     SetImageAlignment(ALIGN_CENTER, ALIGN_MIDDLE);
     image_ = ui::ResourceBundle::GetSharedInstance().GetImageNamed(
         IDR_AURA_UBER_TRAY_VOLUME_LEVELS);
-    SetPreferredSize(gfx::Size(kTrayPopupItemHeight, kTrayPopupItemHeight));
     Update();
   }
 
   virtual ~VolumeButton() {}
 
   void Update() {
     float level =
         static_cast<float>(audio_delegate_->GetOutputVolumeLevel()) / 100.0f;
     int image_index = audio_delegate_->IsOutputAudioMuted() ?
         0 : (level == 1.0 ?
@@ skipping 260 matching lines @@
 
 bool VolumeView::PerformAction(const ui::Event& event) {
   if (!more_->visible())
     return false;
   owner_->TransitionDetailedView();
   return true;
 }
 
 }  // namespace tray
 }  // namespace ash