Revert of Make TrayDetailsView a ViewClickListener and ButtonListener

ash/common/system/chromeos/audio/audio_detailed_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/common/system/chromeos/audio/audio_detailed_view.h"
 
 #include "ash/common/system/tray/fixed_sized_scroll_view.h"
 #include "ash/common/system/tray/hover_highlight_view.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 80 matching lines @@
 HoverHighlightView* AudioDetailedView::AddScrollListItem(
     const base::string16& text,
     bool highlight,
     bool checked) {
   HoverHighlightView* container = new HoverHighlightView(this);
   container->AddCheckableLabel(text, highlight, checked);
   scroll_content()->AddChildView(container);
   return container;
 }
 
+void AudioDetailedView::CreateHeaderEntry() {
+  CreateSpecialRow(IDS_ASH_STATUS_TRAY_AUDIO, this);
+}
+
 void AudioDetailedView::CreateItems() {
   CreateScrollableList();
-  CreateTitleRow(IDS_ASH_STATUS_TRAY_AUDIO);
+  CreateHeaderEntry();
 }
 
 void AudioDetailedView::UpdateAudioDevices() {
   output_devices_.clear();
   input_devices_.clear();
   chromeos::AudioDeviceList devices;
   CrasAudioHandler::Get()->GetAudioDevices(&devices);
   for (size_t i = 0; i < devices.size(); ++i) {
     // Don't display keyboard mic or aokr type.
     if (!devices[i].is_for_simple_usage())
@@ skipping 29 matching lines @@
     HoverHighlightView* container = AddScrollListItem(
         GetAudioDeviceName(input_devices_[i]), false /* highlight */,
         input_devices_[i].active); /* checkmark if active */
     device_map_[container] = input_devices_[i];
   }
 
   scroll_content()->SizeToPreferredSize();
   scroller()->Layout();
 }
 
-void AudioDetailedView::HandleViewClicked(views::View* view) {
-  AudioDeviceMap::iterator iter = device_map_.find(view);
-  if (iter == device_map_.end())
-    return;
-  chromeos::AudioDevice device = iter->second;
-  CrasAudioHandler::Get()->SwitchToDevice(device, true,
-                                          CrasAudioHandler::ACTIVATE_BY_USER);
+void AudioDetailedView::OnViewClicked(views::View* sender) {
+  if (sender == footer()->content()) {
+    TransitionToDefaultView();
+  } else {
+    AudioDeviceMap::iterator iter = device_map_.find(sender);
+    if (iter == device_map_.end())
+      return;
+    chromeos::AudioDevice device = iter->second;
+    CrasAudioHandler::Get()->SwitchToDevice(device, true,
+                                            CrasAudioHandler::ACTIVATE_BY_USER);
+  }
 }
 
 }  // namespace tray
 }  // namespace ash