Replace scoped_ptr with unique_ptr everywhere

talk/app/webrtc/objc/RTCVideoCapturer.mm

Index: talk/app/webrtc/objc/RTCVideoCapturer.mm
diff --git a/talk/app/webrtc/objc/RTCVideoCapturer.mm b/talk/app/webrtc/objc/RTCVideoCapturer.mm
index 9dbc201a677cd0ebd3ad7112bf47be9d8b9f2078..39f06934e7750473a140a2291411dc9c1e5ca226 100644
--- a/talk/app/webrtc/objc/RTCVideoCapturer.mm
+++ b/talk/app/webrtc/objc/RTCVideoCapturer.mm
@@ -43,7 +43,7 @@
 + (RTCVideoCapturer*)capturerWithDeviceName:(NSString*)deviceName {
   cricket::WebRtcVideoDeviceCapturerFactory factory;
   cricket::Device device(std::string(deviceName.UTF8String), 0);
-  rtc::scoped_ptr<cricket::VideoCapturer> capturer(factory.Create(device));
+  std::unique_ptr<cricket::VideoCapturer> capturer(factory.Create(device));
   RTCVideoCapturer* rtcCapturer =
       [[RTCVideoCapturer alloc] initWithCapturer:capturer.release()];
   return rtcCapturer;