Reland of "Mustash: Ensure surfaces submitted to Mus by WM and embedders contain Surfaces with embe…

services/ui/ws/test_utils.cc

 // 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.
 
 #include "services/ui/ws/test_utils.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "cc/output/copy_output_request.h"
@@ skipping 133 matching lines @@
 TestPlatformDisplayFactory::~TestPlatformDisplayFactory() {}
 
 std::unique_ptr<PlatformDisplay>
 TestPlatformDisplayFactory::CreatePlatformDisplay(
     const PlatformDisplayInitParams& init_params) {
   return base::MakeUnique<TestPlatformDisplay>(init_params, cursor_storage_);
 }
 
 // TestFrameGeneratorDelegate -------------------------------------------------
 
-TestFrameGeneratorDelegate::TestFrameGeneratorDelegate() {}
+TestFrameGeneratorDelegate::TestFrameGeneratorDelegate(
+    ServerWindow* root_window)
+    : root_window_(root_window) {}
 
 TestFrameGeneratorDelegate::~TestFrameGeneratorDelegate() {}
 
+ServerWindow* TestFrameGeneratorDelegate::GetActiveRootWindow() {
+  return root_window_;
+}
+
 bool TestFrameGeneratorDelegate::IsInHighContrastMode() {
   return false;
 }
 
 // WindowTreeTestApi  ---------------------------------------------------------
 
 WindowTreeTestApi::WindowTreeTestApi(WindowTree* tree) : tree_(tree) {}
 WindowTreeTestApi::~WindowTreeTestApi() {}
 
 void WindowTreeTestApi::StartPointerWatcher(bool want_moves) {
@@ skipping 454 matching lines @@
     return nullptr;
   if (!tree->AddWindow(parent_client_id, client_window_id))
     return nullptr;
   *client_id = client_window_id;
   return tree->GetWindowByClientId(client_window_id);
 }
 
 }  // namespace test
 }  // namespace ws
 }  // namespace ui