Replace scoped_ptr with unique_ptr in webrtc/api/

webrtc/api/datachannel_unittest.cc

Index: webrtc/api/datachannel_unittest.cc
diff --git a/webrtc/api/datachannel_unittest.cc b/webrtc/api/datachannel_unittest.cc
index 5958ec02f855eebc7eef3e9636ce632b123152d3..d55ab57b64dfc642252932cca9252acfee5a267f 100644
--- a/webrtc/api/datachannel_unittest.cc
+++ b/webrtc/api/datachannel_unittest.cc
@@ -8,6 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include <memory>
+
 #include "webrtc/api/datachannel.h"
 #include "webrtc/api/sctputils.h"
 #include "webrtc/api/test/fakedatachannelprovider.h"
@@ -85,7 +87,7 @@ class SctpDataChannelTest : public testing::Test {
 
   webrtc::InternalDataChannelInit init_;
   FakeDataChannelProvider provider_;
-  rtc::scoped_ptr<FakeDataChannelObserver> observer_;
+  std::unique_ptr<FakeDataChannelObserver> observer_;
   rtc::scoped_refptr<DataChannel> webrtc_data_channel_;
 };