[Chromoting] Implement new APIs in DesktopCapturer

remoting/host/desktop_session_proxy.cc

Index: remoting/host/desktop_session_proxy.cc
diff --git a/remoting/host/desktop_session_proxy.cc b/remoting/host/desktop_session_proxy.cc
index 3528be0d45c21c81bee141aafa8fb519e2c54d35..959630dd91cc46891c9f2d03abe377f9f285a9af 100644
--- a/remoting/host/desktop_session_proxy.cc
+++ b/remoting/host/desktop_session_proxy.cc
@@ -273,6 +273,18 @@ void DesktopSessionProxy::CaptureFrame() {
   }
 }
 
+bool DesktopSessionProxy::GetSourceList(
+    webrtc::DesktopCapturer::SourceList* sources) {
+  // TODO(zijiehe): Implement source enumeration.
+  sources->push_back({0});
+  return true;
+}
+
+bool DesktopSessionProxy::SelectSource(webrtc::DesktopCapturer::SourceId id) {
+  // TODO(zijiehe): Implement source selection.
+  return true;
+}
+
 void DesktopSessionProxy::SetVideoCapturer(
     const base::WeakPtr<IpcVideoFrameCapturer> video_capturer) {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());