Remove implicit conversions from scoped_refptr to T* in ash/

ash/system/win/audio/tray_audio_delegate_win.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/win/audio/tray_audio_delegate_win.h"
 
 #include <audiopolicy.h>
 #include <cmath>
 
 #include "media/audio/win/core_audio_util_win.h"
@@ skipping 18 matching lines @@
     SetOutputVolumeLevel(kDefaultUnmuteVolumePercent);
 }
 
 int TrayAudioDelegateWin::GetOutputDefaultVolumeMuteLevel() {
   return kMuteThresholdPercent;
 }
 
 int TrayAudioDelegateWin::GetOutputVolumeLevel() {
   ScopedComPtr<ISimpleAudioVolume> volume_control =
       CreateDefaultVolumeControl();
-  if (!volume_control)
+  if (!volume_control.get())
     return 0;
 
   float level = 0.0f;
   if (FAILED(volume_control->GetMasterVolume(&level)))
     return 0;
 
   // MSVC prior to 2013 doesn't have a round function.  The below code is not
   // conformant to C99 round(), but since we know that 0 <= level <= 100, it
   // should be ok.
   return static_cast<int>(level + 0.5);
 }
 
 int TrayAudioDelegateWin::GetActiveOutputDeviceIconId() {
   return kNoAudioDeviceIcon;
 }
 
 bool TrayAudioDelegateWin::HasAlternativeSources() {
   return false;
 }
 
 bool TrayAudioDelegateWin::IsOutputAudioMuted() {
   ScopedComPtr<ISimpleAudioVolume> volume_control =
       CreateDefaultVolumeControl();
 
-  if (!volume_control)
+  if (!volume_control.get())
     return false;
 
   BOOL mute = FALSE;
   if (FAILED(volume_control->GetMute(&mute)))
     return false;
 
   return !!mute;
 }
 
 void TrayAudioDelegateWin::SetOutputAudioIsMuted(bool is_muted) {
   ScopedComPtr<ISimpleAudioVolume> volume_control =
       CreateDefaultVolumeControl();
 
-  if (!volume_control)
+  if (!volume_control.get())
     return;
 
   volume_control->SetMute(is_muted, NULL);
 }
 
 void TrayAudioDelegateWin::SetOutputVolumeLevel(int level) {
   ScopedComPtr<ISimpleAudioVolume> volume_control =
       CreateDefaultVolumeControl();
 
-  if (!volume_control)
+  if (!volume_control.get())
     return;
 
   float volume_level = static_cast<float>(level) / 100.0f;
   volume_control->SetMasterVolume(volume_level, NULL);
 }
 
 void TrayAudioDelegateWin::SetInternalSpeakerChannelMode(
     AudioChannelMode mode) {
 }
 
 ScopedComPtr<ISimpleAudioVolume>
 TrayAudioDelegateWin::CreateDefaultVolumeControl() {
   ScopedComPtr<ISimpleAudioVolume> volume_control;
   ScopedComPtr<IAudioSessionManager> session_manager;
 
   ScopedComPtr<IMMDevice> device =
       media::CoreAudioUtil::CreateDefaultDevice(eRender, eConsole);
-  if (!device ||
+  if (!device.get() ||
       FAILED(device->Activate(__uuidof(IAudioSessionManager), CLSCTX_ALL, NULL,
-             session_manager.ReceiveVoid()))) {
+                              session_manager.ReceiveVoid()))) {
     return volume_control;
   }
 
   session_manager->GetSimpleAudioVolume(NULL, FALSE,
       volume_control.Receive());
 
   return volume_control;
 }
 
 }  // namespace system
 }  // namespace ash