Switch DRM platform to using a separate thread

ui/ozone/platform/drm/gpu/gbm_surfaceless.cc

 // 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.
 
 #include "ui/ozone/platform/drm/gpu/gbm_surfaceless.h"
 
-#include "base/bind.h"
-#include "base/bind_helpers.h"
 #include "ui/ozone/platform/drm/gpu/drm_device.h"
 #include "ui/ozone/platform/drm/gpu/drm_device_manager.h"
+#include "ui/ozone/platform/drm/gpu/drm_thread.h"
 #include "ui/ozone/platform/drm/gpu/drm_vsync_provider.h"
 #include "ui/ozone/platform/drm/gpu/drm_window.h"
-#include "ui/ozone/platform/drm/gpu/gbm_buffer.h"
-#include "ui/ozone/platform/drm/gpu/hardware_display_controller.h"
+#include "ui/ozone/platform/drm/gpu/proxy_helpers.h"
 
 namespace ui {
 
-GbmSurfaceless::GbmSurfaceless(DrmWindow* window,
-                               DrmDeviceManager* drm_device_manager)
-    : window_(window), drm_device_manager_(drm_device_manager) {
-}
+GbmSurfaceless::GbmSurfaceless(gfx::AcceleratedWidget widget,
+                               DrmThread* drm_thread)
+    : widget_(widget),
+      drm_thread_(drm_thread),
+      window_(drm_thread->GetWindow(widget_)) {}
 
 GbmSurfaceless::~GbmSurfaceless() {
 }
 
 intptr_t GbmSurfaceless::GetNativeWindow() {
   NOTREACHED();
   return 0;
 }
 
 bool GbmSurfaceless::ResizeNativeWindow(const gfx::Size& viewport_size) {
   return true;
 }
 
 bool GbmSurfaceless::OnSwapBuffers() {
   NOTREACHED();
   return false;
 }
 
 bool GbmSurfaceless::OnSwapBuffersAsync(
     const SwapCompletionCallback& callback) {
-  return window_->SchedulePageFlip(callback);
+  drm_thread_->task_runner()->PostTask(
+      FROM_HERE, base::Bind(&DrmWindow::SchedulePageFlip, window_,
+                            CreateSafeCallback(callback)));
+  return true;
 }
 
 scoped_ptr<gfx::VSyncProvider> GbmSurfaceless::CreateVSyncProvider() {
-  return make_scoped_ptr(new DrmVSyncProvider(window_));
+  return make_scoped_ptr(
+      new DrmVSyncProvider(drm_thread_->task_runner(), window_));
 }
 
 bool GbmSurfaceless::IsUniversalDisplayLinkDevice() {
-  if (!drm_device_manager_)
+  DrmDeviceManager* device_manager = drm_thread_->device_manager();
+  scoped_refptr<DrmDevice> widget_device =
+      device_manager->GetDrmDevice(widget_);
+  if (!widget_device)
     return false;
-  scoped_refptr<DrmDevice> drm_primary =
-      drm_device_manager_->GetDrmDevice(gfx::kNullAcceleratedWidget);
-  DCHECK(drm_primary);
 
-  HardwareDisplayController* controller = window_->GetController();
-  if (!controller)
-    return false;
-  scoped_refptr<DrmDevice> drm = controller->GetAllocationDrmDevice();
-  DCHECK(drm);
-
-  return drm_primary != drm;
+  return device_manager->GetDrmDevice(gfx::kNullAcceleratedWidget) !=
+         widget_device;
 }
 
 }  // namespace ui