Update webrtc::DesktopCapturer clients to implement OnCaptureResult().

remoting/host/desktop_session_agent.h

Index: remoting/host/desktop_session_agent.h
diff --git a/remoting/host/desktop_session_agent.h b/remoting/host/desktop_session_agent.h
index 554d27f27f08a29e12a136dafa742aa9728efaf7..5f6da5987a191406f327128a0f67980b663c1fca 100644
--- a/remoting/host/desktop_session_agent.h
+++ b/remoting/host/desktop_session_agent.h
@@ -78,7 +78,8 @@ class DesktopSessionAgent
   void OnChannelError() override;
 
   // webrtc::DesktopCapturer::Callback implementation.
-  void OnCaptureCompleted(webrtc::DesktopFrame* frame) override;
+  void OnCaptureResult(webrtc::DesktopCapturer::Result result,
+                       std::unique_ptr<webrtc::DesktopFrame> frame) override;
 
   // webrtc::MouseCursorMonitor::Callback implementation.
   void OnMouseCursor(webrtc::MouseCursor* cursor) override;