Remove webrtc::DesktopCapturer::Callback::CreateSharedMemory() overrides.

CreateSharedMemory() has been deprecated and no longer needs to be
overridden in DesktopCapturer::Callback implementations.

Review URL: https://codereview.chromium.org/1902593004

Cr-Commit-Position: refs/heads/master@{#388561}

remoting/protocol/video_frame_pump.cc

@@ -112,11 +112,6 @@ void VideoFramePump::SetSizeCallback(const SizeCallback& size_callback) {
   size_callback_ = size_callback;
 }
 
-webrtc::SharedMemory* VideoFramePump::CreateSharedMemory(size_t size) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  return nullptr;
-}
-
 void VideoFramePump::OnCaptureCompleted(webrtc::DesktopFrame* frame) {
   DCHECK(thread_checker_.CalledOnValidThread());
 

remoting/protocol/video_frame_pump.h

@@ -122,7 +122,6 @@ class VideoFramePump : public VideoStream,
   };
 
   // webrtc::DesktopCapturer::Callback interface.
-  webrtc::SharedMemory* CreateSharedMemory(size_t size) override;
   void OnCaptureCompleted(webrtc::DesktopFrame* frame) override;
 
   // Callback for CaptureScheduler.

remoting/protocol/webrtc_frame_scheduler.cc

@@ -84,11 +84,6 @@ bool WebRtcFrameScheduler::ClearAndGetKeyFrameRequest() {
   return key_frame_request;
 }
 
-webrtc::SharedMemory* WebRtcFrameScheduler::CreateSharedMemory(size_t size) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  return nullptr;
-}
-
 void WebRtcFrameScheduler::OnCaptureCompleted(webrtc::DesktopFrame* frame) {
   DCHECK(thread_checker_.CalledOnValidThread());
 

remoting/protocol/webrtc_frame_scheduler.h

@@ -45,7 +45,6 @@ class WebRtcFrameScheduler : public webrtc::DesktopCapturer::Callback {
 
  private:
   // webrtc::DesktopCapturer::Callback interface.
-  webrtc::SharedMemory* CreateSharedMemory(size_t size) override;
   void OnCaptureCompleted(webrtc::DesktopFrame* frame) override;
 
   // Callback for CaptureScheduler.