Basic display management for mus

components/mus/ws/platform_screen.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 "components/mus/ws/platform_screen.h"
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/thread_task_runner_handle.h"
+#include "ui/display/types/display_snapshot.h"
+#include "ui/display/types/native_display_delegate.h"
+#include "ui/display/types/native_display_observer.h"
+
+namespace mus {
+namespace ws {
+
+PlatformScreen::PlatformScreen() : weak_ptr_factory_(this) {}
+
+PlatformScreen::~PlatformScreen() {}
+
+void PlatformScreen::Init() {}
+
+void PlatformScreen::FixedSizeScreenConfiguration(
+    ConfiguredDisplayCallback callback) {
+  callback.Run(1, gfx::Rect(1024, 768));
+}
+
+void PlatformScreen::ConfigurePhysicalDisplay(
+    ConfiguredDisplayCallback callback) {
+  base::ThreadTaskRunnerHandle::Get()->PostTask(

[sky, 2016/05/03 02:39:51]

Why does this need to be async?

[rjkroege, 2016/05/03 21:03:03]

This way, it has the same callback semantics as the ozone version. 

+      FROM_HERE, base::Bind(&PlatformScreen::FixedSizeScreenConfiguration,
+                            weak_ptr_factory_.GetWeakPtr(), callback));
+}
+
+void PlatformScreen::OnConfigurationChanged() {
+  NOTREACHED();
+}
+void PlatformScreen::OnDisplaysAquired(
+    ConfiguredDisplayCallback callback,
+    const std::vector<ui::DisplaySnapshot*>& displays) {
+  NOTREACHED();
+}
+void PlatformScreen::OnDisplayConfigured(ConfiguredDisplayCallback callback,
+                                         int64_t id,
+                                         const gfx::Rect& bounds,
+                                         bool success) {
+  NOTREACHED();
+}
+
+}  // namespace ws
+}  // namespace mus