Add display task to trigger display configuration

ui/ozone/platform/dri/native_display_delegate_proxy.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/dri/native_display_delegate_proxy.h"
 
 #include <stdio.h>
 
 #include "base/logging.h"
 #include "ui/display/types/display_snapshot.h"
@@ skipping 84 matching lines @@
   proxy_->Send(new OzoneGpuMsg_ForceDPMSOn());
 }
 
 std::vector<DisplaySnapshot*> NativeDisplayDelegateProxy::GetDisplays() {
   // GetDisplays() is supposed to force a refresh of the display list.
   proxy_->Send(new OzoneGpuMsg_RefreshNativeDisplays(
       std::vector<DisplaySnapshot_Params>()));
   return displays_.get();
 }
 
+void NativeDisplayDelegateProxy::GetDisplays(
+    const GetDisplaysCallback& callback) {
+  callback.Run(GetDisplays());
+}
+
 void NativeDisplayDelegateProxy::AddMode(const DisplaySnapshot& output,
                                          const DisplayMode* mode) {
 }
 
 bool NativeDisplayDelegateProxy::Configure(const DisplaySnapshot& output,
                                            const DisplayMode* mode,
                                            const gfx::Point& origin) {
   // TODO(dnicoara) Should handle an asynchronous response.
   if (mode)
     proxy_->Send(new OzoneGpuMsg_ConfigureNativeDisplay(
@@ skipping 118 matching lines @@
   displays_.clear();
   for (size_t i = 0; i < displays.size(); ++i)
     displays_.push_back(
         new DriDisplaySnapshotProxy(displays[i], display_manager_));
 
   FOR_EACH_OBSERVER(NativeDisplayObserver, observers_,
                     OnConfigurationChanged());
 }
 
 }  // namespace ui