Adds a do-nothing ozone platform

ui/ozone/platform/test/ozone_platform_test.cc

 // Copyright 2013 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 "ui/ozone/platform/test/ozone_platform_test.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
-#include "ui/events/ozone/device/device_manager.h"
 #include "ui/ozone/platform/test/test_cursor_factory.h"
 #include "ui/ozone/platform/test/test_event_factory.h"
 #include "ui/ozone/platform/test/test_window.h"
 #include "ui/ozone/platform/test/test_window_manager.h"
 #include "ui/ozone/public/cursor_factory_ozone.h"
 #include "ui/ozone/public/gpu_platform_support.h"
 #include "ui/ozone/public/gpu_platform_support_host.h"
 #include "ui/ozone/public/ozone_platform.h"
 #include "ui/ozone/public/ozone_switches.h"
 
@@ skipping 43 matching lines @@
     return scoped_ptr<NativeDisplayDelegate>(new NativeDisplayDelegateOzone());
   }
   virtual scoped_ptr<TouchscreenDeviceManager>
       CreateTouchscreenDeviceManager() OVERRIDE {
     return scoped_ptr<TouchscreenDeviceManager>(
         new TouchscreenDeviceManagerOzone());
   }
 #endif
 
   virtual void InitializeUI() OVERRIDE {
-    device_manager_ = CreateDeviceManager();
     window_manager_.reset(new TestWindowManager(file_path_));
     window_manager_->Initialize();
     event_factory_ozone_.reset(new TestEventFactory());
     cursor_factory_ozone_.reset(new TestCursorFactory());
     gpu_platform_support_host_.reset(CreateStubGpuPlatformSupportHost());
   }
 
   virtual void InitializeGPU() OVERRIDE {
     gpu_platform_support_.reset(CreateStubGpuPlatformSupport());
   }
 
  private:
-  scoped_ptr<DeviceManager> device_manager_;
   scoped_ptr<TestWindowManager> window_manager_;
   scoped_ptr<TestEventFactory> event_factory_ozone_;
   scoped_ptr<CursorFactoryOzone> cursor_factory_ozone_;
   scoped_ptr<GpuPlatformSupport> gpu_platform_support_;
   scoped_ptr<GpuPlatformSupportHost> gpu_platform_support_host_;
   base::FilePath file_path_;
 
   DISALLOW_COPY_AND_ASSIGN(OzonePlatformTest);
 };
 
 }  // namespace
 
 OzonePlatform* CreateOzonePlatformTest() {
   CommandLine* cmd = CommandLine::ForCurrentProcess();
-  base::FilePath location = base::FilePath("/dev/null");
+  base::FilePath location;
   if (cmd->HasSwitch(switches::kOzoneDumpFile))
     location = cmd->GetSwitchValuePath(switches::kOzoneDumpFile);
   return new OzonePlatformTest(location);
 }
 
 }  // namespace ui