Centralize all gbm ozone host IPC

ui/ozone/platform/drm/host/gpu_thread_adapter.h

Index: ui/ozone/platform/drm/host/gpu_thread_adapter.h
diff --git a/ui/ozone/platform/drm/host/gpu_thread_adapter.h b/ui/ozone/platform/drm/host/gpu_thread_adapter.h
new file mode 100644
index 0000000000000000000000000000000000000000..358714db3f9ee01f33822f351ff8d3d81a5d0b89
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+++ b/ui/ozone/platform/drm/host/gpu_thread_adapter.h
@@ -0,0 +1,72 @@
+// Copyright 2016 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_DRM_HOST_GPU_THREAD_ADAPTER_H_
+#define UI_OZONE_PLATFORM_DRM_HOST_GPU_THREAD_ADAPTER_H_
+
+#include "base/file_descriptor_posix.h"
+#include "ui/display/types/display_constants.h"
+#include "ui/display/types/gamma_ramp_rgb_entry.h"
+#include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
+#include "ui/ozone/public/overlay_candidates_ozone.h"
+
+namespace ui {
+
+class DrmDisplayHostManager;
+class DrmOverlayManager;
+class GpuThreadObserver;
+
+// Provides the services that the various host components need
+// to use either a GPU process or thread for their implementation.
+class GpuThreadAdapter {
+ public:
+  virtual ~GpuThreadAdapter() {}
+
+  virtual bool IsConnected() = 0;
+  virtual void AddGpuThreadObserver(GpuThreadObserver* observer) = 0;
+  virtual void RemoveGpuThreadObserver(GpuThreadObserver* observer) = 0;
+
+  // Methods for Display management.
+  virtual void RegisterHandlerForDrmDisplayHostManager(
+      DrmDisplayHostManager* handler) = 0;
+  virtual void UnRegisterHandlerForDrmDisplayHostManager() = 0;
+
+  // Services needed for DrmDisplayHostMananger
+  virtual bool GpuTakeDisplayControl() = 0;
+  virtual bool GpuRefreshNativeDisplays() = 0;
+  virtual bool GpuRelinquishDisplayControl() = 0;
+  virtual bool GpuAddGraphicsDevice(const base::FilePath& path,
+                                    base::FileDescriptor fd) = 0;
+  virtual bool GpuRemoveGraphicsDevice(const base::FilePath& path) = 0;
+
+  // Methods for DrmOverlayManager.
+  virtual void RegisterHandlerForDrmOverlayManager(
+      DrmOverlayManager* handler) = 0;
+  virtual void UnRegisterHandlerForDrmOverlayManager() = 0;
+
+  // Services needed by DrmOverlayManager
+  virtual bool GpuCheckOverlayCapabilities(
+      gfx::AcceleratedWidget widget,
+      const std::vector<OverlayCheck_Params>& new_params) = 0;
+
+  // Services needed by DrmDisplayHost
+  virtual bool GpuConfigureNativeDisplay(int64_t display_id,
+                                         ui::DisplayMode_Params display_mode,
+                                         gfx::Point point) = 0;
+  virtual bool GpuDisableNativeDisplay(int64_t display_id) = 0;
+  virtual bool GpuGetHDCPState(int64_t display_id) = 0;
+  virtual bool GpuSetHDCPState(int64_t display_id, ui::HDCPState state) = 0;
+  virtual bool GpuSetGammaRamp(int64_t display_id,
+                               const std::vector<GammaRampRGBEntry>& lut) = 0;
+
+  // Services needed by DrmWindowHost
+  virtual bool GpuDestroyWindow(gfx::AcceleratedWidget widget) = 0;
+  virtual bool GpuCreateWindow(gfx::AcceleratedWidget widget) = 0;
+  virtual bool GpuWindowBoundsChanged(gfx::AcceleratedWidget widget,
+                                      gfx::Rect bounds) = 0;
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_HOST_GPU_THREAD_ADAPTER_H_