Use webrtc::MouseCursorMonitor for cursor shapes

remoting/host/desktop_environment.h

Index: remoting/host/desktop_environment.h
diff --git a/remoting/host/desktop_environment.h b/remoting/host/desktop_environment.h
index c289891293d3953cb1e064c1c4905806175edbb0..50a163af505255a6fd2e2bcc685198a373896d4e 100644
--- a/remoting/host/desktop_environment.h
+++ b/remoting/host/desktop_environment.h
@@ -19,6 +19,7 @@ class SingleThreadTaskRunner;
 
 namespace webrtc {
 class ScreenCapturer;
+class MouseCursorMonitor;
 }  // namespace webrtc
 
 namespace remoting {
@@ -45,6 +46,7 @@ class DesktopEnvironment {
   virtual scoped_ptr<InputInjector> CreateInputInjector() = 0;
   virtual scoped_ptr<ScreenControls> CreateScreenControls() = 0;
   virtual scoped_ptr<webrtc::ScreenCapturer> CreateVideoCapturer() = 0;
+  virtual scoped_ptr<webrtc::MouseCursorMonitor> CreateMouseCursorMonitor() = 0;
 
   // Returns the set of all capabilities supported by |this|.
   virtual std::string GetCapabilities() const = 0;