Replace scoped_ptr with unique_ptr in webrtc/call/

webrtc/call/call_unittest.cc

Index: webrtc/call/call_unittest.cc
diff --git a/webrtc/call/call_unittest.cc b/webrtc/call/call_unittest.cc
index 75c8238a5bd94bc3726e7f61c276e6963a1a64c1..0da91a9bf739ee0fbe0174286d9b84e278b1c411 100644
--- a/webrtc/call/call_unittest.cc
+++ b/webrtc/call/call_unittest.cc
@@ -9,6 +9,7 @@
  */
 
 #include <list>
+#include <memory>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -31,7 +32,7 @@ struct CallHelper {
 
  private:
   testing::NiceMock<webrtc::test::MockVoiceEngine> voice_engine_;
-  rtc::scoped_ptr<webrtc::Call> call_;
+  std::unique_ptr<webrtc::Call> call_;
 };
 }  // namespace