Implement a runtime headless mode for Linux

headless/lib/browser/headless_window_tree_host.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 "headless/lib/browser/headless_window_tree_host.h"
+
+#include "ui/gfx/icc_profile.h"
+
+namespace headless {
+
+HeadlessWindowTreeHost::HeadlessWindowTreeHost(const gfx::Rect& bounds)
+    : bounds_(bounds) {
+  CreateCompositor();
+  OnAcceleratedWidgetAvailable();
+}
+
+HeadlessWindowTreeHost::~HeadlessWindowTreeHost() {
+  DestroyCompositor();
+  DestroyDispatcher();
+}
+
+bool HeadlessWindowTreeHost::CanDispatchEvent(const ui::PlatformEvent& event) {
+  return false;
+}
+
+uint32_t HeadlessWindowTreeHost::DispatchEvent(const ui::PlatformEvent& event) {
+  return 0;
+}
+
+ui::EventSource* HeadlessWindowTreeHost::GetEventSource() {
+  return this;
+}
+
+gfx::AcceleratedWidget HeadlessWindowTreeHost::GetAcceleratedWidget() {
+  return gfx::AcceleratedWidget();
+}
+
+gfx::Rect HeadlessWindowTreeHost::GetBounds() const {
+  return bounds_;
+}
+
+void HeadlessWindowTreeHost::SetBounds(const gfx::Rect& bounds) {
+  bounds_ = bounds;

[Eric Seckler, 2016/11/28 15:51:48]

You might want to call OnHostMoved() / OnHostResized() here, see

https://cs.chromium.org/chromium/src/ui/aura/window_tree_host_x11.cc?sq=packa...

[Sami, 2016/11/28 18:00:36]

Thanks, done!

+}
+
+void HeadlessWindowTreeHost::ShowImpl() {}
+
+void HeadlessWindowTreeHost::HideImpl() {}
+
+gfx::Point HeadlessWindowTreeHost::GetLocationOnNativeScreen() const {
+  return gfx::Point();
+}
+
+void HeadlessWindowTreeHost::SetCapture() {}
+
+void HeadlessWindowTreeHost::ReleaseCapture() {}
+
+void HeadlessWindowTreeHost::SetCursorNative(gfx::NativeCursor cursor_type) {}
+
+void HeadlessWindowTreeHost::MoveCursorToNative(const gfx::Point& location) {}
+
+void HeadlessWindowTreeHost::OnCursorVisibilityChangedNative(bool show) {}
+
+gfx::ICCProfile HeadlessWindowTreeHost::GetICCProfileForCurrentDisplay() {
+  return gfx::ICCProfile();
+}
+
+}  // namespace headless