mash: Don't synthesize extra key press events in the window server

ui/ozone/public/ozone_platform.h

Index: ui/ozone/public/ozone_platform.h
diff --git a/ui/ozone/public/ozone_platform.h b/ui/ozone/public/ozone_platform.h
index 97cab2cfebd51b060fd9870d7c7b618cebb65500..a8b6edc1df08459626de1353d50cb1beeec22293 100644
--- a/ui/ozone/public/ozone_platform.h
+++ b/ui/ozone/public/ozone_platform.h
@@ -93,6 +93,10 @@ class OZONE_EXPORT OzonePlatform {
   // provided by |args| as with InitalizeForUI.
   static void InitializeForGPU(const InitParams& args);
 
+  // Deletes the instance. Does nothing if OzonePlatform has not yet been
+  // initialized.
+  static void Shutdown();
+
   static OzonePlatform* GetInstance();
 
   // Factory getters to override in subclasses. The returned objects will be