[Chromoting] Implement new APIs in DesktopCapturer

remoting/host/chromeos/aura_desktop_capturer.h

Index: remoting/host/chromeos/aura_desktop_capturer.h
diff --git a/remoting/host/chromeos/aura_desktop_capturer.h b/remoting/host/chromeos/aura_desktop_capturer.h
index 7d185a3314e01b7c9c08ce49200f02c17b4c7002..19c7e91d7aeb917a492bb9c60c435a3086c59ba6 100644
--- a/remoting/host/chromeos/aura_desktop_capturer.h
+++ b/remoting/host/chromeos/aura_desktop_capturer.h
@@ -33,6 +33,8 @@ class AuraDesktopCapturer : public webrtc::DesktopCapturer {
   // webrtc::DesktopCapturer implementation.
   void Start(webrtc::DesktopCapturer::Callback* callback) override;
   void CaptureFrame() override;
+  bool GetSourceList(SourceList* sources) override;
+  bool SelectSource(SourceId id) override;
 
  private:
   friend class AuraDesktopCapturerTest;