Do not activate system tray bubble by default

ash/system/web_notification/web_notification_tray_unittest.cc

 // Copyright (c) 2012 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 "ash/common/system/web_notification/web_notification_tray.h"
 
 #include <utility>
 #include <vector>
 
+#include "ash/common/shelf/shelf_layout_manager.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/system/status_area_widget.h"
 #include "ash/common/system/tray/system_tray.h"
 #include "ash/common/system/tray/system_tray_item.h"
 #include "ash/common/system/web_notification/ash_popup_alignment_delegate.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_lookup.h"
 #include "ash/common/wm_window.h"
 #include "ash/display/display_manager.h"
@@ skipping 118 matching lines @@
     return tray->popup_alignment_delegate_->GetWorkAreaBottom();
   }
 
   bool IsPopupVisible() { return GetTray()->IsPopupVisible(); }
 
   static std::unique_ptr<views::Widget> CreateTestWidget() {
     return AshTestBase::CreateTestWidget(
         nullptr, kShellWindowId_DefaultContainer, gfx::Rect(1, 2, 3, 4));
   }
 
+  static void UpdateAutoHideStateNow() {
+    GetPrimaryShelf()->shelf_layout_manager()->UpdateAutoHideStateNow();
+  }
+
  private:
   DISALLOW_COPY_AND_ASSIGN(WebNotificationTrayTest);
 };
 
 INSTANTIATE_TEST_CASE_P(
     /* prefix intentionally left blank due to only one parameterization */,
     WebNotificationTrayTest,
     testing::Values(MaterialDesignController::NON_MATERIAL,
                     MaterialDesignController::MATERIAL_NORMAL,
                     MaterialDesignController::MATERIAL_EXPERIMENTAL));
@@ skipping 197 matching lines @@
   widget.reset();
   EXPECT_EQ(SHELF_AUTO_HIDE_SHOWN, shelf->GetAutoHideState());
   int bottom_auto_shown = GetPopupWorkAreaBottom();
   EXPECT_EQ(bottom, bottom_auto_shown);
 
   // Create the system tray during auto-hide.
   widget = CreateTestWidget();
   TestItem* test_item = new TestItem;
   GetSystemTray()->AddTrayItem(test_item);
   GetSystemTray()->ShowDefaultView(BUBBLE_CREATE_NEW);
+  UpdateAutoHideStateNow();
 
   EXPECT_EQ(SHELF_AUTO_HIDE_SHOWN, shelf->GetAutoHideState());
   EXPECT_TRUE(GetTray()->IsPopupVisible());
   int bottom_with_tray = GetPopupWorkAreaBottom();
   EXPECT_GT(bottom_auto_shown, bottom_with_tray);
 
   // Create tray notification.
   GetSystemTray()->ShowNotificationView(test_item);
   EXPECT_EQ(SHELF_AUTO_HIDE_SHOWN, shelf->GetAutoHideState());
   int bottom_with_tray_notification = GetPopupWorkAreaBottom();
@@ skipping 132 matching lines @@
   EXPECT_FALSE(tray->draw_background_as_active());
 
   generator.ReleaseTouch();
   EXPECT_FALSE(tray->draw_background_as_active());
   EXPECT_FALSE(tray->IsMessageCenterBubbleVisible());
 }
 
 #endif  // OS_CHROMEOS
 
 }  // namespace ash