[Chrome OS MD] Draw a 1px separator between 2 tray items

ash/common/system/status_area_widget.cc

Index: ash/common/system/status_area_widget.cc
diff --git a/ash/common/system/status_area_widget.cc b/ash/common/system/status_area_widget.cc
index 0d95965a196a583603aeebaddb0e24fc68f0cc4e..36d259a081c293000291bf63a8e5718f20509c10 100644
--- a/ash/common/system/status_area_widget.cc
+++ b/ash/common/system/status_area_widget.cc
@@ -4,12 +4,14 @@
 
 #include "ash/common/system/status_area_widget.h"
 
+#include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/system/overview/overview_button_tray.h"
 #include "ash/common/system/status_area_widget_delegate.h"
 #include "ash/common/system/tray/system_tray.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
+#include "ash/common/system/view_observer.h"
 #include "ash/common/system/web_notification/web_notification_tray.h"
 #include "ash/common/wm_lookup.h"
 #include "ash/common/wm_root_window_controller.h"
@@ -155,41 +157,41 @@ void StatusAreaWidget::OnGestureEvent(ui::GestureEvent* event) {
 }
 
 void StatusAreaWidget::AddSystemTray() {
-  system_tray_ = new SystemTray(wm_shelf_);
+  system_tray_ = new SystemTray(wm_shelf_, this);
   status_area_widget_delegate_->AddTray(system_tray_);
 }
 
 void StatusAreaWidget::AddWebNotificationTray() {
   DCHECK(system_tray_);
   web_notification_tray_ = new WebNotificationTray(
-      wm_shelf_, WmLookup::Get()->GetWindowForWidget(this), system_tray_);
+      wm_shelf_, WmLookup::Get()->GetWindowForWidget(this), system_tray_, this);
   status_area_widget_delegate_->AddTray(web_notification_tray_);
 }
 
 #if defined(OS_CHROMEOS)
 void StatusAreaWidget::AddLogoutButtonTray() {
-  logout_button_tray_ = new LogoutButtonTray(wm_shelf_);
+  logout_button_tray_ = new LogoutButtonTray(wm_shelf_, this);
   status_area_widget_delegate_->AddTray(logout_button_tray_);
 }
 
 void StatusAreaWidget::AddPaletteTray() {
-  palette_tray_ = new PaletteTray(wm_shelf_);
+  palette_tray_ = new PaletteTray(wm_shelf_, this);
   status_area_widget_delegate_->AddTray(palette_tray_);
 }
 
 void StatusAreaWidget::AddVirtualKeyboardTray() {
-  virtual_keyboard_tray_ = new VirtualKeyboardTray(wm_shelf_);
+  virtual_keyboard_tray_ = new VirtualKeyboardTray(wm_shelf_, this);
   status_area_widget_delegate_->AddTray(virtual_keyboard_tray_);
 }
 
 void StatusAreaWidget::AddImeMenuTray() {
-  ime_menu_tray_ = new ImeMenuTray(wm_shelf_);
+  ime_menu_tray_ = new ImeMenuTray(wm_shelf_, this);
   status_area_widget_delegate_->AddTray(ime_menu_tray_);
 }
 #endif
 
 void StatusAreaWidget::AddOverviewButtonTray() {
-  overview_button_tray_ = new OverviewButtonTray(wm_shelf_);
+  overview_button_tray_ = new OverviewButtonTray(wm_shelf_, this);
   status_area_widget_delegate_->AddTray(overview_button_tray_);
 }
 
@@ -230,4 +232,26 @@ void StatusAreaWidget::UpdateAfterLoginStatusChange(LoginStatus login_status) {
     overview_button_tray_->UpdateAfterLoginStatusChange(login_status);
 }
 
+void StatusAreaWidget::OnVisibilityChange(TrayBackgroundView* tray) {
+  if (ash::MaterialDesignController::IsShelfMaterial()) {
+#if defined(OS_CHROMEOS)
+    if (tray == virtual_keyboard_tray_) {
+      if (logout_button_tray_->visible()) {
+        tray->SetSeparatorVisibility(false);
+      } else {
+        tray->SetSeparatorVisibility(true);
+      }
+
+    } else if (tray == ime_menu_tray_) {
+      if (logout_button_tray_->visible() &&
+          !virtual_keyboard_tray_->visible()) {
+        tray->SetSeparatorVisibility(false);
+      } else {
+        tray->SetSeparatorVisibility(true);
+      }
+    }
+#endif
+  }
+}
+
 }  // namespace ash