[WIP][Ozone] Support external touchscreens

ui/ozone/platform/dri/native_display_delegate_proxy.h

 // 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.
 
 #ifndef UI_OZONE_PLATFORM_DRI_NATIVE_DISPLAY_DELEGATE_PROXY_H_
 #define UI_OZONE_PLATFORM_DRI_NATIVE_DISPLAY_DELEGATE_PROXY_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
 #include "base/observer_list.h"
 #include "ui/display/types/native_display_delegate.h"
 #include "ui/events/ozone/device/device_event_observer.h"
 #include "ui/ozone/public/gpu_platform_support_host.h"
 
 namespace ui {
 
 class DeviceManager;
+class DisplayManager;
 class DriGpuPlatformSupportHost;
 
 struct DisplaySnapshot_Params;
 
 class NativeDisplayDelegateProxy : public NativeDisplayDelegate,
                                    public DeviceEventObserver,
                                    public GpuPlatformSupportHost {
  public:
   NativeDisplayDelegateProxy(DriGpuPlatformSupportHost* proxy,
-                             DeviceManager* device_manager);
+                             DeviceManager* device_manager,
+                             DisplayManager* display_manager);
   virtual ~NativeDisplayDelegateProxy();
 
   // NativeDisplayDelegate overrides:
   virtual void Initialize() override;
   virtual void GrabServer() override;
   virtual void UngrabServer() override;
   virtual void SyncWithServer() override;
   virtual void SetBackgroundColor(uint32_t color_argb) override;
   virtual void ForceDPMSOn() override;
   virtual std::vector<DisplaySnapshot*> GetDisplays() override;
@@ skipping 25 matching lines @@
 
   // IPC::Listener overrides:
   virtual bool OnMessageReceived(const IPC::Message& message) override;
 
  private:
   void OnUpdateNativeDisplays(
       const std::vector<DisplaySnapshot_Params>& displays);
 
   DriGpuPlatformSupportHost* proxy_;  // Not owned.
   DeviceManager* device_manager_;     // Not owned.
+  DisplayManager* display_manager_;   // Not owned.
+
   ScopedVector<DisplaySnapshot> displays_;
   ObserverList<NativeDisplayObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeDisplayDelegateProxy);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_NATIVE_DISPLAY_DELEGATE_PROXY_H_