[Ozone-GBM] Add basic support for display configuration over IPC

ui/ozone/platform/dri/gpu_platform_support_host_gbm.h

Index: ui/ozone/platform/dri/gpu_platform_support_host_gbm.h
diff --git a/ui/ozone/platform/dri/gpu_platform_support_host_gbm.h b/ui/ozone/platform/dri/gpu_platform_support_host_gbm.h
index 6463413c32111b32bb7d78e61133fe2030e252d6..03c276d675ab8580faf7487186811cfe0437647c 100644
--- a/ui/ozone/platform/dri/gpu_platform_support_host_gbm.h
+++ b/ui/ozone/platform/dri/gpu_platform_support_host_gbm.h
@@ -5,7 +5,9 @@
 #ifndef UI_OZONE_PLATFORM_DRI_GPU_PLATFORM_SUPPORT_HOST_GBM_H_
 #define UI_OZONE_PLATFORM_DRI_GPU_PLATFORM_SUPPORT_HOST_GBM_H_
 
+#include "base/memory/scoped_vector.h"
 #include "ui/gfx/native_widget_types.h"
+#include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
 #include "ui/ozone/platform/dri/hardware_cursor_delegate.h"
 #include "ui/ozone/public/gpu_platform_support_host.h"
 
@@ -17,11 +19,21 @@ class Point;
 
 namespace ui {
 
+#if defined(OS_CHROMEOS)
+class DisplayMode;
+class DisplaySnapshot;
+class NativeDisplayDelegateProxy;
+#endif
+
 class GpuPlatformSupportHostGbm : public GpuPlatformSupportHost,
                                   public HardwareCursorDelegate {
  public:
   GpuPlatformSupportHostGbm();
 
+#if defined(OS_CHROMEOS)
+  void RegisterDisplayDelegate(NativeDisplayDelegateProxy* ndd);
+#endif
+
   // GpuPlatformSupportHost:
   virtual void OnChannelEstablished(int host_id, IPC::Sender* sender) OVERRIDE;
   virtual void OnChannelDestroyed(int host_id) OVERRIDE;
@@ -36,7 +48,23 @@ class GpuPlatformSupportHostGbm : public GpuPlatformSupportHost,
   virtual void MoveHardwareCursor(gfx::AcceleratedWidget widget,
                                   const gfx::Point& location) OVERRIDE;
 
+#if defined(OS_CHROMEOS)
+  // Display Configuration helpers:
+  void ForceDPMSOn();
+  void RefreshNativeDisplays();
+  void ConfigureNativeDisplay(int64_t id,
+                              const DisplayMode* mode,
+                              const gfx::Point& origin);
+#endif
+
  private:
+#if defined(OS_CHROMEOS)
+  void OnUpdateNativeDisplays(
+      const std::vector<DisplaySnapshot_Params>& displays);
+
+  NativeDisplayDelegateProxy* ndd_;
+#endif
+
   int host_id_;
   IPC::Sender* sender_;
 };