Add FakeDisplayDelegate for off device usage.

ui/display/chromeos/test/test_native_display_delegate.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/display/chromeos/test/test_native_display_delegate.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 88 matching lines @@
   if (run_async_) {
     base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
                                                   base::Bind(callback, result));
   } else {
     callback.Run(result);
   }
 }
 
 void TestNativeDisplayDelegate::CreateFrameBuffer(const gfx::Size& size) {
   log_->AppendAction(
-      GetFramebufferAction(size, outputs_.size() >= 1 ? outputs_[0] : NULL,
-                           outputs_.size() >= 2 ? outputs_[1] : NULL));
+      GetFramebufferAction(size, outputs_.size() >= 1 ? outputs_[0] : nullptr,
+                           outputs_.size() >= 2 ? outputs_[1] : nullptr));
 }
 
 void TestNativeDisplayDelegate::GetHDCPState(
     const DisplaySnapshot& output,
     const GetHDCPStateCallback& callback) {
   callback.Run(get_hdcp_expectation_, hdcp_state_);
 }
 
 void TestNativeDisplayDelegate::SetHDCPState(
     const DisplaySnapshot& output,
@@ skipping 25 matching lines @@
   return true;
 }
 
 void TestNativeDisplayDelegate::AddObserver(NativeDisplayObserver* observer) {
 }
 
 void TestNativeDisplayDelegate::RemoveObserver(
     NativeDisplayObserver* observer) {
 }
 
+display::VirtualDisplayController*
+TestNativeDisplayDelegate::GetVirtualDisplayController() {
+  return nullptr;
+}
+
 }  // namespace test
 }  // namespace ui