Handle modified displays in mustash.

services/ui/ws/platform_display_delegate.h

Index: services/ui/ws/platform_display_delegate.h
diff --git a/services/ui/ws/platform_display_delegate.h b/services/ui/ws/platform_display_delegate.h
index 224e79ebcbee371b7579ffb480eceb464ae8cc6a..721005818c20e3d0386d5843cc67797e5ba48d4f 100644
--- a/services/ui/ws/platform_display_delegate.h
+++ b/services/ui/ws/platform_display_delegate.h
@@ -16,7 +16,6 @@ class Event;
 namespace ws {
 
 class ServerWindow;
-struct ViewportMetrics;
 
 // PlatformDisplayDelegate is implemented by an object that manages the
 // lifetime of a PlatformDisplay, forwards events to the appropriate windows,
@@ -38,10 +37,6 @@ class PlatformDisplayDelegate {
   // Called when the Display loses capture.
   virtual void OnNativeCaptureLost() = 0;
 
-  // Signals that the metrics of this display's viewport has changed.
-  virtual void OnViewportMetricsChanged(const ViewportMetrics& old_metrics,
-                                        const ViewportMetrics& new_metrics) = 0;
-
  protected:
   virtual ~PlatformDisplayDelegate() {}
 };