WebRTC's scoped_ptr and scoped_ptr.h are going away, so stop using them

remoting/host/desktop_capturer_proxy.cc

Index: remoting/host/desktop_capturer_proxy.cc
diff --git a/remoting/host/desktop_capturer_proxy.cc b/remoting/host/desktop_capturer_proxy.cc
index a9ffa9b651085f5d87a4df64e9b055fb70290a05..d00ca37d2c7a122c7fad03a5654e8ec6e62e0cf5 100644
--- a/remoting/host/desktop_capturer_proxy.cc
+++ b/remoting/host/desktop_capturer_proxy.cc
@@ -84,9 +84,7 @@ void DesktopCapturerProxy::Core::SetSharedMemoryFactory(
     std::unique_ptr<webrtc::SharedMemoryFactory> shared_memory_factory) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (capturer_) {
-    capturer_->SetSharedMemoryFactory(
-        rtc::scoped_ptr<webrtc::SharedMemoryFactory>(
-            shared_memory_factory.release()));
+    capturer_->SetSharedMemoryFactory(std::move(shared_memory_factory));
   }
 }
 
@@ -132,7 +130,7 @@ void DesktopCapturerProxy::Start(Callback* callback) {
 }
 
 void DesktopCapturerProxy::SetSharedMemoryFactory(
-    rtc::scoped_ptr<webrtc::SharedMemoryFactory> shared_memory_factory) {
+    std::unique_ptr<webrtc::SharedMemoryFactory> shared_memory_factory) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   capture_task_runner_->PostTask(