Add configuration_changed event and set_background_opacity request.

components/exo/wayland/server.cc

Index: components/exo/wayland/server.cc
diff --git a/components/exo/wayland/server.cc b/components/exo/wayland/server.cc
index ee3a25aa333b40c14033de982e02b5aa1aff6724..f25ab4ada6a36e0c6d5bf992c148398aacfead0a 100644
--- a/components/exo/wayland/server.cc
+++ b/components/exo/wayland/server.cc
@@ -1042,7 +1042,7 @@ class WaylandDisplayObserver : public display::DisplayObserver {
                          wl_resource* output_resource)
       : display_id_(display.id()), output_resource_(output_resource) {
     display::Screen::GetScreen()->AddObserver(this);
-    SendDisplayMetrics(display);
+    SendDisplayMetricsObsolete(display);
   }
   ~WaylandDisplayObserver() override {
     display::Screen::GetScreen()->RemoveObserver(this);
@@ -1059,12 +1059,12 @@ class WaylandDisplayObserver : public display::DisplayObserver {
     if (changed_metrics &
         (DISPLAY_METRIC_BOUNDS | DISPLAY_METRIC_DEVICE_SCALE_FACTOR |
          DISPLAY_METRIC_ROTATION)) {
-      SendDisplayMetrics(display);
+      SendDisplayMetricsObsolete(display);
     }
   }
 
  private:
-  void SendDisplayMetrics(const display::Display& display) {
+  void SendDisplayMetricsObsolete(const display::Display& display) {
     const ash::DisplayInfo& info =
         ash::Shell::GetInstance()->display_manager()->GetDisplayInfo(
             display.id());
@@ -1519,6 +1519,13 @@ void remote_surface_unset_system_modal(wl_client* client,
   GetUserDataAs<ShellSurface>(resource)->SetSystemModal(false);
 }
 
+void remote_surface_set_background_opacity(wl_client* client,
+                                           wl_resource* resource,
+                                           wl_fixed_t opacity) {
+  GetUserDataAs<ShellSurface>(resource)->SetBackgroundOpacity(
+      wl_fixed_to_double(opacity));
+}
+
 const struct zwp_remote_surface_v1_interface remote_surface_implementation = {
     remote_surface_destroy,
     remote_surface_set_app_id,
@@ -1535,7 +1542,8 @@ const struct zwp_remote_surface_v1_interface remote_surface_implementation = {
     remote_surface_set_title,
     remote_surface_set_top_inset,
     remote_surface_set_system_modal,
-    remote_surface_unset_system_modal};
+    remote_surface_unset_system_modal,
+    remote_surface_set_background_opacity};
 
 ////////////////////////////////////////////////////////////////////////////////
 // notification_surface_interface:
@@ -1567,7 +1575,9 @@ class WaylandRemoteShell : public ash::ShellObserver,
     ash::Shell* shell = ash::Shell::GetInstance();
     shell->activation_client()->AddObserver(this);
     display::Screen::GetScreen()->AddObserver(this);
-    SendConfigure();
+    SendConfigureObsolete();
+    SendPrimaryDisplayMetrics();
+
     SendActivated(shell->activation_client()->GetActiveWindow(), nullptr);
   }
   ~WaylandRemoteShell() override {
@@ -1591,15 +1601,25 @@ class WaylandRemoteShell : public ash::ShellObserver,
   void OnDisplayAdded(const display::Display& new_display) override {}
   void OnDisplayRemoved(const display::Display& new_display) override {}
   void OnDisplayMetricsChanged(const display::Display& display,
-                               uint32_t metrics) override {
+                               uint32_t changed_metrics) override {
+    if (display::Screen::GetScreen()->GetPrimaryDisplay().id() ==
+            display.id() &&
+        (changed_metrics &
+         (DISPLAY_METRIC_BOUNDS | DISPLAY_METRIC_DEVICE_SCALE_FACTOR |
+          DISPLAY_METRIC_ROTATION | DISPLAY_METRIC_WORK_AREA))) {
+      SendPrimaryDisplayMetrics();
+    }
+
     if (display.id() == display_id_)
-      SendConfigure();
+      SendConfigureObsolete();
   }
 
   // Overridden from ash::ShellObserver:
-  void OnDisplayWorkAreaInsetsChanged() override { SendConfigure(); }
+  void OnDisplayWorkAreaInsetsChanged() override { SendConfigureObsolete(); }
   void OnMaximizeModeStarted() override {
     SendLayoutModeChange(ZWP_REMOTE_SHELL_V1_LAYOUT_MODE_TABLET);
+    layout_mode_ = ZWP_REMOTE_SHELL_V1_LAYOUT_MODE_TABLET;
+
     send_configure_after_layout_change_ = true;
     base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
         FROM_HERE, base::Bind(&WaylandRemoteShell::MaybeSendConfigure,
@@ -1608,6 +1628,7 @@ class WaylandRemoteShell : public ash::ShellObserver,
   }
   void OnMaximizeModeEnded() override {
     SendLayoutModeChange(ZWP_REMOTE_SHELL_V1_LAYOUT_MODE_WINDOWED);
+    layout_mode_ = ZWP_REMOTE_SHELL_V1_LAYOUT_MODE_WINDOWED;
     send_configure_after_layout_change_ = true;
     base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
         FROM_HERE, base::Bind(&WaylandRemoteShell::MaybeSendConfigure,
@@ -1625,13 +1646,51 @@ class WaylandRemoteShell : public ash::ShellObserver,
 
  private:
   void MaybeSendConfigure() {
-    if (send_configure_after_layout_change_)
-      SendConfigure();
+    if (send_configure_after_layout_change_) {
+      SendPrimaryDisplayMetrics();
+      SendConfigureObsolete();
+    }
   }
 
-  void SendConfigure() {
+  void SendPrimaryDisplayMetrics() {
+    const float kInchInMm = 25.4f;
+
+    if (wl_resource_get_version(remote_shell_resource_) < 9)
+      return;
+
     send_configure_after_layout_change_ = false;
     const display::Display& display =
+        display::Screen::GetScreen()->GetPrimaryDisplay();
+    const ash::DisplayInfo& info =
+        ash::Shell::GetInstance()->display_manager()->GetDisplayInfo(
+            display.id());
+
+    gfx::Insets work_area_insets = display.GetWorkAreaInsets();
+    gfx::Rect native_bounds = info.bounds_in_native();
+
+    int refresh_rate = 60000;
+    zwp_remote_shell_v1_send_display_changed(
+        remote_shell_resource_, native_bounds.x(), native_bounds.y(),
+        static_cast<int>(kInchInMm * native_bounds.width() / info.device_dpi()),
+        static_cast<int>(kInchInMm * native_bounds.height() /
+                         info.device_dpi()),
+        WL_OUTPUT_SUBPIXEL_UNKNOWN, OutputTransform(display.rotation()),
+        native_bounds.width(), native_bounds.height(), refresh_rate,
+        wl_fixed_from_double(display.device_scale_factor()),
+        display.size().width(), display.size().height(),
+        work_area_insets.left(), work_area_insets.top(),
+        work_area_insets.right(), work_area_insets.bottom(), layout_mode_);
+
+    wl_client_flush(wl_resource_get_client(remote_shell_resource_));
+  }
+
+  void SendConfigureObsolete() {
+    send_configure_after_layout_change_ = false;
+
+    if (wl_resource_get_version(remote_shell_resource_) >= 9)
+      return;
+
+    const display::Display& display =
         ash::Shell::GetInstance()->display_manager()->GetDisplayForId(
             display_id_);
     gfx::Insets work_area_insets = display.GetWorkAreaInsets();
@@ -1693,6 +1752,8 @@ class WaylandRemoteShell : public ash::ShellObserver,
 
   bool send_configure_after_layout_change_ = false;
 
+  int layout_mode_ = ZWP_REMOTE_SHELL_V1_LAYOUT_MODE_WINDOWED;
+
   base::WeakPtrFactory<WaylandRemoteShell> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WaylandRemoteShell);
@@ -1838,7 +1899,7 @@ const struct zwp_remote_shell_v1_interface remote_shell_implementation = {
     remote_shell_destroy, remote_shell_get_remote_surface,
     remote_shell_get_notification_surface};
 
-const uint32_t remote_shell_version = 8;
+const uint32_t remote_shell_version = 9;
 
 void bind_remote_shell(wl_client* client,
                        void* data,