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

ui/ozone/public/ozone_platform.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/command_line.h"
+#include "ui/ozone/public/ozone_platform.h"
+
 #include "base/logging.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/events/devices/device_data_manager.h"
 #include "ui/ozone/platform_object.h"
 #include "ui/ozone/platform_selection.h"
-#include "ui/ozone/public/ozone_platform.h"
 #include "ui/ozone/public/ozone_switches.h"
 
 namespace ui {
 
 namespace {
 
 bool g_platform_initialized_ui = false;
 bool g_platform_initialized_gpu = false;
 
-}
+}  // namespace
 
 OzonePlatform::OzonePlatform() {
   DCHECK(!instance_) << "There should only be a single OzonePlatform.";
   instance_ = this;
   g_platform_initialized_ui = false;
   g_platform_initialized_gpu = false;
 }
 
 OzonePlatform::~OzonePlatform() {
   DCHECK_EQ(instance_, this);
@@ skipping 57 matching lines @@
   return nullptr;
 }
 
 base::MessageLoop::Type OzonePlatform::GetMessageLoopTypeForGpu() {
   return base::MessageLoop::TYPE_DEFAULT;
 }
 
 void OzonePlatform::AddInterfaces(
     service_manager::InterfaceRegistry* registry) {}
 
+ScopedOzonePlatformForTesting::ScopedOzonePlatformForTesting(
+    OzonePlatform* test_instance)
+    : auto_reset_(&OzonePlatform::instance_, test_instance) {}
+
+ScopedOzonePlatformForTesting::~ScopedOzonePlatformForTesting() = default;
+
 }  // namespace ui