[WIP] Make content_shell run under Wayland

ui/ozone/platform/wayland/wayland_display.cc

Index: ui/ozone/platform/wayland/wayland_display.cc
diff --git a/ui/ozone/platform/wayland/wayland_display.cc b/ui/ozone/platform/wayland/wayland_display.cc
index 4feb9d7d103496d9977783dd22bd4da09c47a83f..54efedbfc1f66682fc608a1156af6a05c7f6d009 100644
--- a/ui/ozone/platform/wayland/wayland_display.cc
+++ b/ui/ozone/platform/wayland/wayland_display.cc
@@ -23,9 +23,15 @@ const uint32_t kMaxShmVersion = 1;
 const uint32_t kMaxXdgShellVersion = 1;
 }  // namespace
 
-WaylandDisplay::WaylandDisplay() {}
+WaylandDisplay* WaylandDisplay::instance_ = nullptr;
 
-WaylandDisplay::~WaylandDisplay() {}
+WaylandDisplay::WaylandDisplay() : desktop_platform_screen_delegate_(nullptr) {}
+
+WaylandDisplay::~WaylandDisplay() {
+  for (WaylandScreen* screen : screen_list_)
+    delete screen;
+  screen_list_.clear();
+}
 
 bool WaylandDisplay::Initialize() {
   static const wl_registry_listener registry_listener = {
@@ -64,6 +70,7 @@ bool WaylandDisplay::Initialize() {
     return false;
   }
 
+  instance_ = this;
   return true;
 }
 
@@ -127,6 +134,22 @@ void WaylandDisplay::OnFileCanReadWithoutBlocking(int fd) {
 
 void WaylandDisplay::OnFileCanWriteWithoutBlocking(int fd) {}
 
+void WaylandDisplay::OutputSizeChanged(int32_t name,
+                                       unsigned width,
+                                       unsigned height) {
+  if (desktop_platform_screen_delegate_)
+    desktop_platform_screen_delegate_->OnOutputSizeChanged(name, width, height);
+}
+
+const std::vector<WaylandScreen*>& WaylandDisplay::GetScreenList() const {
+  return screen_list_;
+}
+
+void WaylandDisplay::SetDesktopScreenDelegate(
+    DesktopPlatformScreenDelegate* delegate) {
+  desktop_platform_screen_delegate_ = delegate;
+}
+
 // static
 void WaylandDisplay::Global(void* data,
                             wl_registry* registry,
@@ -169,6 +192,13 @@ void WaylandDisplay::Global(void* data,
     xdg_shell_add_listener(display->shell_.get(), &shell_listener, display);
     xdg_shell_use_unstable_version(display->shell_.get(),
                                    XDG_SHELL_VERSION_CURRENT);
+  } else if (strcmp(interface, "wl_output") == 0) {
+    WaylandScreen* screen = new WaylandScreen(registry, name);
+    if (!display->screen_list_.empty())
+      NOTIMPLEMENTED() << "Multiple screens support is not implemented";
+
+    display->screen_list_.push_back(screen);
+    display->primary_screen_ = display->screen_list_.front();
   }
 
   display->ScheduleFlush();