Centralize all gbm ozone host IPC

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

Index: ui/ozone/platform/drm/host/drm_display_host.h
diff --git a/ui/ozone/platform/drm/host/drm_display_host.h b/ui/ozone/platform/drm/host/drm_display_host.h
index 515c19bbf1f81e479a1d1a18ae9533939462e042..bc2ab4b0a263be4b0b093e88d07a3c7f7ab75367 100644
--- a/ui/ozone/platform/drm/host/drm_display_host.h
+++ b/ui/ozone/platform/drm/host/drm_display_host.h
@@ -15,11 +15,11 @@ namespace ui {
 
 struct DisplaySnapshot_Params;
 class DisplaySnapshot;
-class DrmGpuPlatformSupportHost;
+class GpuThreadAdapter;
 
 class DrmDisplayHost : public GpuThreadObserver {
  public:
-  DrmDisplayHost(DrmGpuPlatformSupportHost* sender,
+  DrmDisplayHost(GpuThreadAdapter* sender,
                  const DisplaySnapshot_Params& params,
                  bool is_dummy);
   ~DrmDisplayHost() override;
@@ -48,7 +48,7 @@ class DrmDisplayHost : public GpuThreadObserver {
   // Calls all the callbacks with failure.
   void ClearCallbacks();
 
-  DrmGpuPlatformSupportHost* sender_;  // Not owned.
+  GpuThreadAdapter* sender_;  // Not owned.
 
   scoped_ptr<DisplaySnapshot> snapshot_;