Use base/scoped_ptr.h; system_wrappers/interface/scoped_ptr.h is going away

BUG=
R=andrew@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/36229004

Cr-Commit-Position: refs/heads/master@{#8517}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8517 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_coding/main/test/PacketLossTest.cc b/webrtc/modules/audio_coding/main/test/PacketLossTest.cc
index 9fec486..f19d491 100644
--- a/webrtc/modules/audio_coding/main/test/PacketLossTest.cc
+++ b/webrtc/modules/audio_coding/main/test/PacketLossTest.cc
@@ -126,7 +126,7 @@
 #ifndef WEBRTC_CODEC_OPUS
   return;
 #else
-  scoped_ptr<AudioCodingModule> acm(AudioCodingModule::Create(0));
+  rtc::scoped_ptr<AudioCodingModule> acm(AudioCodingModule::Create(0));
 
   int codec_id = acm->Codec("opus", 48000, channels_);