[Chromoting] Implement new APIs in DesktopCapturer

remoting/host/desktop_capturer_proxy.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/host/desktop_capturer_proxy.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 148 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
 
   // Start() must be called before Capture().
   DCHECK(callback_);
 
   capture_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&Core::CaptureFrame, base::Unretained(core_.get())));
 }
 
+bool DesktopCapturerProxy::GetSourceList(SourceList* sources) {
+  return false;
+}
+
+bool DesktopCapturerProxy::SelectSource(SourceId id) {
+  return false;
+}
+
 void DesktopCapturerProxy::OnFrameCaptured(
     webrtc::DesktopCapturer::Result result,
     std::unique_ptr<webrtc::DesktopFrame> frame) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   callback_->OnCaptureResult(result, std::move(frame));
 }
 
 }  // namespace remoting