Delete unused classes DesktopId and ScreencastEventCatcher.

webrtc/media/base/testutils.h

Index: webrtc/media/base/testutils.h
diff --git a/webrtc/media/base/testutils.h b/webrtc/media/base/testutils.h
index b0aacd57464f908d3a113f41015f6a7f7232346d..5c3d1a71fd6f035d63114ca6e06a83618b468240 100644
--- a/webrtc/media/base/testutils.h
+++ b/webrtc/media/base/testutils.h
@@ -105,20 +105,6 @@ class VideoCapturerListener
   bool resolution_changed_;
 };
 
-class ScreencastEventCatcher : public sigslot::has_slots<> {
- public:
-  ScreencastEventCatcher() : ssrc_(0), ev_(rtc::WE_RESIZE) { }
-  uint32_t ssrc() const { return ssrc_; }
-  rtc::WindowEvent event() const { return ev_; }
-  void OnEvent(uint32_t ssrc, rtc::WindowEvent ev) {
-    ssrc_ = ssrc;
-    ev_ = ev;
-  }
- private:
-  uint32_t ssrc_;
-  rtc::WindowEvent ev_;
-};
-
 class VideoMediaErrorCatcher : public sigslot::has_slots<> {
  public:
   VideoMediaErrorCatcher() : ssrc_(0), error_(VideoMediaChannel::ERROR_NONE) { }