Remove the system menu display settings row

ash/system/chromeos/screen_layout_observer_unittest.cc

Index: ash/system/chromeos/screen_layout_observer_unittest.cc
diff --git a/ash/system/chromeos/tray_display_unittest.cc b/ash/system/chromeos/screen_layout_observer_unittest.cc
similarity index 35%
rename from ash/system/chromeos/tray_display_unittest.cc
rename to ash/system/chromeos/screen_layout_observer_unittest.cc
index 1b6a69a22241444fa3af175c7dfcaa38070d7769..ebdcc4fa4e6003cd024cf42afec41f33d416fa36 100644
--- a/ash/system/chromeos/tray_display_unittest.cc
+++ b/ash/system/chromeos/screen_layout_observer_unittest.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ash/system/chromeos/tray_display.h"
+#include "ash/system/chromeos/screen_layout_observer.h"
 
 #include "ash/common/system/chromeos/devicetype_utils.h"
 #include "ash/common/system/tray/system_tray.h"
@@ -26,34 +26,6 @@
 
 namespace ash {
 
-base::string16 GetTooltipText(const base::string16& headline,
-                              const base::string16& name1,
-                              const std::string& data1,
-                              const base::string16& name2,
-                              const std::string& data2) {
-  std::vector<base::string16> lines;
-  lines.push_back(headline);
-  if (data1.empty()) {
-    lines.push_back(name1);
-  } else {
-    lines.push_back(
-        l10n_util::GetStringFUTF16(IDS_ASH_STATUS_TRAY_DISPLAY_SINGLE_DISPLAY,
-                                   name1, base::UTF8ToUTF16(data1)));
-  }
-  if (!name2.empty()) {
-    lines.push_back(
-        l10n_util::GetStringFUTF16(IDS_ASH_STATUS_TRAY_DISPLAY_SINGLE_DISPLAY,
-                                   name2, base::UTF8ToUTF16(data2)));
-  }
-  return base::JoinString(lines, base::ASCIIToUTF16("\n"));
-}
-
-base::string16 GetMirroredTooltipText(const base::string16& headline,
-                                      const base::string16& name,
-                                      const std::string& data) {
-  return GetTooltipText(headline, name, data, base::string16(), "");
-}
-
 base::string16 GetFirstDisplayName() {
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
   return base::UTF8ToUTF16(display_manager->GetDisplayNameForId(
@@ -72,370 +44,65 @@ base::string16 GetMirroringDisplayName() {
       display_manager->mirroring_display_id()));
 }
 
-class TrayDisplayTest : public ash::test::AshTestBase {
+class ScreenLayoutObserverTest : public test::AshTestBase {
  public:
-  TrayDisplayTest();
-  ~TrayDisplayTest() override;
-
-  void SetUp() override;
+  ScreenLayoutObserverTest();
+  ~ScreenLayoutObserverTest() override;
 
  protected:
-  SystemTray* GetTray();
-  TrayDisplay* GetTrayDisplay();
+  ScreenLayoutObserver* GetScreenLayoutObserver();
   void CheckUpdate();
 
   void CloseNotification();
-  bool IsDisplayVisibleInTray() const;
-  base::string16 GetTrayDisplayText() const;
-  void CheckAccessibleName() const;
-  base::string16 GetTrayDisplayTooltipText() const;
   base::string16 GetDisplayNotificationText() const;
   base::string16 GetDisplayNotificationAdditionalText() const;
 
  private:
   const message_center::Notification* GetDisplayNotification() const;
 
-  // Weak reference, owned by Shell.
-  SystemTray* tray_;
-
-  // Weak reference, owned by |tray_|.
-  TrayDisplay* tray_display_;
-
-  DISALLOW_COPY_AND_ASSIGN(TrayDisplayTest);
+  DISALLOW_COPY_AND_ASSIGN(ScreenLayoutObserverTest);
 };
 
-TrayDisplayTest::TrayDisplayTest() : tray_(NULL), tray_display_(NULL) {}
-
-TrayDisplayTest::~TrayDisplayTest() {}
-
-void TrayDisplayTest::SetUp() {
-  ash::test::AshTestBase::SetUp();
-  // Populate tray_ and tray_display_.
-  CheckUpdate();
-}
-
-SystemTray* TrayDisplayTest::GetTray() {
-  CheckUpdate();
-  return tray_;
-}
+ScreenLayoutObserverTest::ScreenLayoutObserverTest() {}
 
-TrayDisplay* TrayDisplayTest::GetTrayDisplay() {
-  CheckUpdate();
-  return tray_display_;
-}
+ScreenLayoutObserverTest::~ScreenLayoutObserverTest() {}
 
-void TrayDisplayTest::CheckUpdate() {
-  SystemTray* current = GetPrimarySystemTray();
-  if (tray_ != current) {
-    tray_ = current;
-    tray_display_ = new TrayDisplay(tray_);
-    tray_->AddTrayItem(tray_display_);
-  }
+ScreenLayoutObserver* ScreenLayoutObserverTest::GetScreenLayoutObserver() {
+  return Shell::GetInstance()->screen_layout_observer();
 }
 
-void TrayDisplayTest::CloseNotification() {
+void ScreenLayoutObserverTest::CloseNotification() {
   message_center::MessageCenter::Get()->RemoveNotification(
-      TrayDisplay::kNotificationId, false);
+      ScreenLayoutObserver::kNotificationId, false);
   RunAllPendingInMessageLoop();
 }
 
-bool TrayDisplayTest::IsDisplayVisibleInTray() const {
-  return tray_->HasSystemBubble() && tray_display_->default_view() &&
-         tray_display_->default_view()->visible();
-}
-
-base::string16 TrayDisplayTest::GetTrayDisplayText() const {
-  return tray_display_->GetDefaultViewMessage();
-}
-
-void TrayDisplayTest::CheckAccessibleName() const {
-  ui::AXViewState state;
-  if (tray_display_->GetAccessibleStateForTesting(&state)) {
-    base::string16 expected = tray_display_->GetDefaultViewMessage();
-    EXPECT_EQ(expected, state.name);
-  }
-}
-
-base::string16 TrayDisplayTest::GetTrayDisplayTooltipText() const {
-  if (!tray_display_->default_view())
-    return base::string16();
-
-  base::string16 tooltip;
-  if (!tray_display_->default_view()->GetTooltipText(gfx::Point(), &tooltip))
-    return base::string16();
-  return tooltip;
-}
-
-base::string16 TrayDisplayTest::GetDisplayNotificationText() const {
+base::string16 ScreenLayoutObserverTest::GetDisplayNotificationText() const {
   const message_center::Notification* notification = GetDisplayNotification();
   return notification ? notification->title() : base::string16();
 }
 
-base::string16 TrayDisplayTest::GetDisplayNotificationAdditionalText() const {
+base::string16 ScreenLayoutObserverTest::GetDisplayNotificationAdditionalText()
+    const {
   const message_center::Notification* notification = GetDisplayNotification();
   return notification ? notification->message() : base::string16();
 }
 
-const message_center::Notification* TrayDisplayTest::GetDisplayNotification()
-    const {
+const message_center::Notification*
+ScreenLayoutObserverTest::GetDisplayNotification() const {
   const message_center::NotificationList::Notifications notifications =
       message_center::MessageCenter::Get()->GetVisibleNotifications();
   for (message_center::NotificationList::Notifications::const_iterator iter =
            notifications.begin();
        iter != notifications.end(); ++iter) {
-    if ((*iter)->id() == TrayDisplay::kNotificationId)
+    if ((*iter)->id() == ScreenLayoutObserver::kNotificationId)
       return *iter;
   }
 
   return NULL;
 }
 
-TEST_F(TrayDisplayTest, NoInternalDisplay) {
-  UpdateDisplay("400x400");
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_FALSE(IsDisplayVisibleInTray());
-
-  UpdateDisplay("400x400,200x200");
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  base::string16 expected = l10n_util::GetStringUTF16(
-      IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED_NO_INTERNAL);
-  base::string16 first_name = GetFirstDisplayName();
-  EXPECT_EQ(expected, GetTrayDisplayText());
-  EXPECT_EQ(GetTooltipText(expected, GetFirstDisplayName(), "400x400",
-                           GetSecondDisplayName(), "200x200"),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-
-  // mirroring
-  Shell::GetInstance()->display_manager()->SetSoftwareMirroring(true);
-  UpdateDisplay("400x400,200x200");
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  expected = l10n_util::GetStringUTF16(
-      IDS_ASH_STATUS_TRAY_DISPLAY_MIRRORING_NO_INTERNAL);
-  EXPECT_EQ(expected, GetTrayDisplayText());
-  EXPECT_EQ(GetMirroredTooltipText(expected, GetFirstDisplayName(), "400x400"),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-}
-
-TEST_F(TrayDisplayTest, InternalDisplay) {
-  UpdateDisplay("400x400");
-  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
-  display::Display::SetInternalDisplayId(display_manager->first_display_id());
-
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_FALSE(IsDisplayVisibleInTray());
-
-  // Extended
-  UpdateDisplay("400x400,200x200");
-  base::string16 expected = l10n_util::GetStringFUTF16(
-      IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED, GetSecondDisplayName());
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  EXPECT_EQ(expected, GetTrayDisplayText());
-  EXPECT_EQ(GetTooltipText(expected, GetFirstDisplayName(), "400x400",
-                           GetSecondDisplayName(), "200x200"),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-
-  // Mirroring
-  display_manager->SetSoftwareMirroring(true);
-  UpdateDisplay("400x400,200x200");
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-
-  expected = l10n_util::GetStringFUTF16(IDS_ASH_STATUS_TRAY_DISPLAY_MIRRORING,
-                                        GetMirroringDisplayName());
-  EXPECT_EQ(expected, GetTrayDisplayText());
-  EXPECT_EQ(GetMirroredTooltipText(expected, GetFirstDisplayName(), "400x400"),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-}
-
-TEST_F(TrayDisplayTest, InternalDisplayResized) {
-  UpdateDisplay("400x400@1.5");
-  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
-  display::Display::SetInternalDisplayId(display_manager->first_display_id());
-
-  // Shows the tray_display even though there's a single-display.
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  base::string16 internal_info = l10n_util::GetStringFUTF16(
-      IDS_ASH_STATUS_TRAY_DISPLAY_SINGLE_DISPLAY, GetFirstDisplayName(),
-      base::UTF8ToUTF16("600x600"));
-  EXPECT_EQ(internal_info, GetTrayDisplayText());
-  EXPECT_EQ(GetTooltipText(base::string16(), GetFirstDisplayName(), "600x600",
-                           base::string16(), std::string()),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-
-  // Extended
-  UpdateDisplay("400x400@1.5,200x200");
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  base::string16 expected = l10n_util::GetStringFUTF16(
-      IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED, GetSecondDisplayName());
-  EXPECT_EQ(expected, GetTrayDisplayText());
-  EXPECT_EQ(GetTooltipText(expected, GetFirstDisplayName(), "600x600",
-                           GetSecondDisplayName(), "200x200"),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-
-  // Mirroring
-  display_manager->SetSoftwareMirroring(true);
-  UpdateDisplay("400x400@1.5,200x200");
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  expected = l10n_util::GetStringFUTF16(IDS_ASH_STATUS_TRAY_DISPLAY_MIRRORING,
-                                        GetMirroringDisplayName());
-  EXPECT_EQ(expected, GetTrayDisplayText());
-  EXPECT_EQ(GetMirroredTooltipText(expected, GetFirstDisplayName(), "600x600"),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-
-  // Closed lid mode.
-  display_manager->SetSoftwareMirroring(false);
-  UpdateDisplay("400x400@1.5,200x200");
-  display::Display::SetInternalDisplayId(
-      ScreenUtil::GetSecondaryDisplay().id());
-  UpdateDisplay("400x400@1.5");
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  expected = l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_DISPLAY_DOCKED);
-  EXPECT_EQ(expected, GetTrayDisplayText());
-  EXPECT_EQ(GetTooltipText(expected, GetFirstDisplayName(), "600x600",
-                           base::string16(), ""),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-
-  // Unified mode
-  display_manager->SetUnifiedDesktopEnabled(true);
-  UpdateDisplay("300x200,400x500");
-  // Update the cache variables as the primary root window changed.
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  expected = l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_DISPLAY_UNIFIED);
-  EXPECT_EQ(expected, GetTrayDisplayText());
-}
-
-TEST_F(TrayDisplayTest, ExternalDisplayResized) {
-  UpdateDisplay("400x400");
-  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
-  display::Display::SetInternalDisplayId(display_manager->first_display_id());
-
-  // Shows the tray_display even though there's a single-display.
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_FALSE(IsDisplayVisibleInTray());
-
-  // Extended
-  UpdateDisplay("400x400,200x200@1.5");
-  const display::Display& secondary_display = ScreenUtil::GetSecondaryDisplay();
-
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  base::string16 expected = l10n_util::GetStringFUTF16(
-      IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED,
-      l10n_util::GetStringFUTF16(
-          IDS_ASH_STATUS_TRAY_DISPLAY_ANNOTATED_NAME, GetSecondDisplayName(),
-          base::UTF8ToUTF16(secondary_display.size().ToString())));
-  EXPECT_EQ(expected, GetTrayDisplayText());
-  EXPECT_EQ(GetTooltipText(expected, GetFirstDisplayName(), "400x400",
-                           GetSecondDisplayName(), "300x300"),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-
-  // Mirroring
-  display_manager->SetSoftwareMirroring(true);
-  UpdateDisplay("400x400,200x200@1.5");
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  expected = l10n_util::GetStringFUTF16(IDS_ASH_STATUS_TRAY_DISPLAY_MIRRORING,
-                                        GetMirroringDisplayName());
-  EXPECT_EQ(expected, GetTrayDisplayText());
-  EXPECT_EQ(GetMirroredTooltipText(expected, GetFirstDisplayName(), "400x400"),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-}
-
-TEST_F(TrayDisplayTest, OverscanDisplay) {
-  UpdateDisplay("400x400,300x300/o");
-  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
-  display::Display::SetInternalDisplayId(display_manager->first_display_id());
-
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-
-  // /o creates the default overscan, and if overscan is set, the annotation
-  // should be the size.
-  base::string16 overscan = l10n_util::GetStringUTF16(
-      IDS_ASH_STATUS_TRAY_DISPLAY_ANNOTATION_OVERSCAN);
-  base::string16 headline = l10n_util::GetStringFUTF16(
-      IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED,
-      l10n_util::GetStringFUTF16(IDS_ASH_STATUS_TRAY_DISPLAY_ANNOTATED_NAME,
-                                 GetSecondDisplayName(),
-                                 base::UTF8ToUTF16("286x286")));
-  std::string second_data =
-      l10n_util::GetStringFUTF8(IDS_ASH_STATUS_TRAY_DISPLAY_ANNOTATION,
-                                base::UTF8ToUTF16("286x286"), overscan);
-  EXPECT_EQ(GetTooltipText(headline, GetFirstDisplayName(), "400x400",
-                           GetSecondDisplayName(), second_data),
-            GetTrayDisplayTooltipText());
-
-  // reset the overscan.
-  display_manager->SetOverscanInsets(ScreenUtil::GetSecondaryDisplay().id(),
-                                     gfx::Insets());
-  headline = l10n_util::GetStringFUTF16(
-      IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED,
-      l10n_util::GetStringFUTF16(IDS_ASH_STATUS_TRAY_DISPLAY_ANNOTATED_NAME,
-                                 GetSecondDisplayName(), overscan));
-  second_data =
-      l10n_util::GetStringFUTF8(IDS_ASH_STATUS_TRAY_DISPLAY_ANNOTATION,
-                                base::UTF8ToUTF16("300x300"), overscan);
-  EXPECT_EQ(GetTooltipText(headline, GetFirstDisplayName(), "400x400",
-                           GetSecondDisplayName(), second_data),
-            GetTrayDisplayTooltipText());
-}
-
-TEST_F(TrayDisplayTest, UpdateDuringDisplayConfigurationChange) {
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_FALSE(IsDisplayVisibleInTray());
-
-  UpdateDisplay("400x400@1.5");
-  EXPECT_TRUE(GetTray()->HasSystemBubble());
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  base::string16 internal_info = l10n_util::GetStringFUTF16(
-      IDS_ASH_STATUS_TRAY_DISPLAY_SINGLE_DISPLAY, GetFirstDisplayName(),
-      base::UTF8ToUTF16("600x600"));
-  EXPECT_EQ(internal_info, GetTrayDisplayText());
-  EXPECT_EQ(GetTooltipText(base::string16(), GetFirstDisplayName(), "600x600",
-                           base::string16(), std::string()),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-
-  UpdateDisplay("400x400,200x200");
-  EXPECT_TRUE(GetTray()->HasSystemBubble());
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-  base::string16 expected = l10n_util::GetStringUTF16(
-      IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED_NO_INTERNAL);
-  base::string16 first_name = GetFirstDisplayName();
-  EXPECT_EQ(expected, GetTrayDisplayText());
-  EXPECT_EQ(GetTooltipText(expected, GetFirstDisplayName(), "400x400",
-                           GetSecondDisplayName(), "200x200"),
-            GetTrayDisplayTooltipText());
-  CheckAccessibleName();
-
-  UpdateDisplay("400x400@1.5");
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-
-  // Back to the default state, the display tray item should disappear.
-  UpdateDisplay("400x400");
-  EXPECT_TRUE(GetTray()->HasSystemBubble());
-  EXPECT_FALSE(IsDisplayVisibleInTray());
-}
-
-TEST_F(TrayDisplayTest, DisplayNotifications) {
+TEST_F(ScreenLayoutObserverTest, DisplayNotifications) {
   test::TestSystemTrayDelegate* tray_delegate = GetSystemTrayDelegate();
   tray_delegate->set_should_show_display_notification(true);
 
@@ -541,10 +208,9 @@ TEST_F(TrayDisplayTest, DisplayNotifications) {
             GetDisplayNotificationAdditionalText());
 }
 
-TEST_F(TrayDisplayTest, DisplayConfigurationChangedTwice) {
+TEST_F(ScreenLayoutObserverTest, DisplayConfigurationChangedTwice) {

[tdanderson, 2016/08/15 18:55:16]

While you're here, can you please add descriptions to the other tests in this
fixture (i.e., above lines 211 and 233)?

[yiyix, 2016/08/16 15:58:37]

Done.

   test::TestSystemTrayDelegate* tray_delegate = GetSystemTrayDelegate();
   tray_delegate->set_should_show_display_notification(true);
-
   UpdateDisplay("400x400,200x200");
   EXPECT_EQ(l10n_util::GetStringUTF16(
                 IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED_NO_INTERNAL),
@@ -553,7 +219,7 @@ TEST_F(TrayDisplayTest, DisplayConfigurationChangedTwice) {
   // OnDisplayConfigurationChanged() may be called more than once for a single
   // update display in case of primary is swapped or recovered from dock mode.
   // Should not remove the notification in such case.
-  GetTrayDisplay()->OnDisplayConfigurationChanged();
+  GetScreenLayoutObserver()->OnDisplayConfigurationChanged();
   EXPECT_EQ(l10n_util::GetStringUTF16(
                 IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED_NO_INTERNAL),
             GetDisplayNotificationText());
@@ -564,7 +230,7 @@ TEST_F(TrayDisplayTest, DisplayConfigurationChangedTwice) {
   EXPECT_TRUE(GetDisplayNotificationText().empty());
 }
 
-TEST_F(TrayDisplayTest, UpdateAfterSuppressDisplayNotification) {
+TEST_F(ScreenLayoutObserverTest, UpdateAfterSuppressDisplayNotification) {
   UpdateDisplay("400x400,200x200");
 
   test::TestSystemTrayDelegate* tray_delegate = GetSystemTrayDelegate();
@@ -579,39 +245,24 @@ TEST_F(TrayDisplayTest, UpdateAfterSuppressDisplayNotification) {
             GetDisplayNotificationAdditionalText());
 }
 
-// Tests that when the only change is rotation, that it is only displayed when
-// caused by user changes, and not by accelerometers.
-TEST_F(TrayDisplayTest, RotationOnInternalDisplay) {
-  UpdateDisplay("400x400");
+// Verify that if no notification is shown when overscan of a screen is changed.

[tdanderson, 2016/08/15 18:55:16]

nit: remove "if"

[yiyix, 2016/08/16 15:58:37]

Done.

+TEST_F(ScreenLayoutObserverTest, OverscanDisplay) {
+  UpdateDisplay("400x400, 300x300");
+  test::TestSystemTrayDelegate* tray_delegate = GetSystemTrayDelegate();
+  tray_delegate->set_should_show_display_notification(true);
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
-  const int64_t display_id = display_manager->first_display_id();
-  display::Display::SetInternalDisplayId(display_id);
-
-  GetTray()->ShowDefaultView(BUBBLE_USE_EXISTING);
-  EXPECT_FALSE(IsDisplayVisibleInTray());
-
-  // Accelerometer change does not display.
-  display_manager->SetDisplayRotation(
-      display_id, display::Display::ROTATE_90,
-      display::Display::ROTATION_SOURCE_ACCELEROMETER);
-  EXPECT_FALSE(IsDisplayVisibleInTray());
-
-  // User change does.
-  display_manager->SetDisplayRotation(display_id, display::Display::ROTATE_180,
-                                      display::Display::ROTATION_SOURCE_USER);
-  EXPECT_TRUE(IsDisplayVisibleInTray());
-
-  // If a user setting matches the accelerometer, do not display if caused by
-  // the accelerometer.
-  display_manager->SetDisplayRotation(
-      display_id, display::Display::ROTATE_180,
-      display::Display::ROTATION_SOURCE_ACCELEROMETER);
-  EXPECT_FALSE(IsDisplayVisibleInTray());
-
-  // If a non-rotation setting is changed, display regardless of the source of
-  // rotation so that the full message is shown.
-  UpdateDisplay("400x400@1.5");
-  EXPECT_TRUE(IsDisplayVisibleInTray());
+  display::Display::SetInternalDisplayId(display_manager->first_display_id());
+
+  // /o creates the default overscan.

[tdanderson, 2016/08/15 18:55:16]

nit: typo

[yiyix, 2016/08/16 15:58:37]

Done.

+  UpdateDisplay("400x400, 300x300/o");
+  EXPECT_TRUE(GetDisplayNotificationText().empty());
+  EXPECT_TRUE(GetDisplayNotificationAdditionalText().empty());
+
+  // reset the overscan.

[tdanderson, 2016/08/15 18:55:16]

nit: reset->Reset

[yiyix, 2016/08/16 15:58:37]

Done.

+  Shell::GetInstance()->display_manager()->SetOverscanInsets(
+      ScreenUtil::GetSecondaryDisplay().id(), gfx::Insets());
+  EXPECT_TRUE(GetDisplayNotificationText().empty());
+  EXPECT_TRUE(GetDisplayNotificationAdditionalText().empty());
 }
 
 }  // namespace ash