Add overflow indicator count on Windows.

chrome/browser/ui/panels/panel_overflow_browsertest.cc

 // Copyright (c) 2011 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 <vector>
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/panels/base_panel_browser_test.h"
 #include "chrome/browser/ui/panels/native_panel.h"
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_manager.h"
+#include "chrome/browser/ui/panels/panel_overflow_indicator.h"
 #include "chrome/browser/ui/panels/panel_overflow_strip.h"
 #include "chrome/browser/ui/panels/panel_settings_menu_model.h"
 #include "chrome/browser/ui/panels/panel_strip.h"
 #include "chrome/browser/ui/panels/test_panel_mouse_watcher.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
-//  We override the default value for testing purpose.
-const int kMaxVisibleOverflowForTesting = 3;
+// We override the default value for testing purpose.
+const int kMaxVisiblePanelsForTesting = 3;

[jennb, 2011/12/20 02:08:23]

Prefer to have overflow in the name of these 2 as there are definitely more
than3 panels visible.

[jianli, 2011/12/20 22:08:10]

Done.

+const int kMaxVisiblePanelsOnHoverForTesting = 6;
 
 // Encapsulates all the info we need to verify if a panel behaves as expected
 // when we do the overflow testing.
 struct PanelData {
   Panel* panel;
   Panel::ExpansionState expansion_state;
   bool visible;
   bool active;
 
   explicit PanelData(Panel* panel)
@@ skipping 46 matching lines @@
  public:
   PanelOverflowBrowserTest() : BasePanelBrowserTest() {
   }
 
   virtual ~PanelOverflowBrowserTest() {
   }
 
   virtual void SetUpOnMainThread() OVERRIDE {
     BasePanelBrowserTest::SetUpOnMainThread();
 
-    PanelManager::GetInstance()->panel_overflow_strip()->
-        set_max_visible_panels(kMaxVisibleOverflowForTesting);
+    PanelManager* panel_manager = PanelManager::GetInstance();
+    panel_manager->panel_overflow_strip()->
+        set_max_visible_panels(kMaxVisiblePanelsForTesting);
+    panel_manager->panel_overflow_strip()->
+        set_max_visible_panels_on_hover(kMaxVisiblePanelsOnHoverForTesting);
+
+    PanelMouseWatcher* mouse_watcher = new TestPanelMouseWatcher();
+    panel_manager->SetMouseWatcherForTesting(mouse_watcher);
 
     // All the overflow tests assume 800x600 work area. Do the check now.
     DCHECK(PanelManager::GetInstance()->work_area().width() == 800);
   }
 
  protected:
   static PanelDataList GetAllNormalPanelData() {
     PanelDataList panel_data_list;
     PanelStrip::Panels panels =
         PanelManager::GetInstance()->panel_strip()->panels();
@@ skipping 70 matching lines @@
 #define MAYBE_CheckPanelProperties CheckPanelProperties
 #define MAYBE_UpdateDraggableStatus UpdateDraggableStatus
 #define MAYBE_CreateOverflowPanels CreateOverflowPanels
 #define MAYBE_CreateMoreOverflowPanels CreateMoreOverflowPanels
 // http://crbug.com/107230
 #define MAYBE_CreatePanelOnDelayedOverflow FAILS_CreatePanelOnDelayedOverflow
 #define MAYBE_CloseOverflowPanels CloseOverflowPanels
 #define MAYBE_CloseNormalPanels CloseNormalPanels
 #define MAYBE_ActivateOverflowPanels ActivateOverflowPanels
 #define MAYBE_HoverOverOverflowArea HoverOverOverflowArea
+#define MAYBE_OverflowIndicatorCount OverflowIndicatorCount
+#define MAYBE_DrawOverflowAttention DrawOverflowAttention
 #else
 #define MAYBE_CheckPanelProperties DISABLED_CheckPanelProperties
 #define MAYBE_UpdateDraggableStatus DISABLED_UpdateDraggableStatus
 #define MAYBE_CreateOverflowPanels DISABLED_CreateOverflowPanels
 #define MAYBE_CreateMoreOverflowPanels DISABLED_CreateMoreOverflowPanels
 #define MAYBE_CreatePanelOnDelayedOverflow DISABLED_CreatePanelOnDelayedOverflow
 #define MAYBE_CloseOverflowPanels DISABLED_CloseOverflowPanels
 #define MAYBE_CloseNormalPanels DISABLED_CloseNormalPanels
 #define MAYBE_ActivateOverflowPanels DISABLED_ActivateOverflowPanels
 #define MAYBE_HoverOverOverflowArea DISABLED_HoverOverOverflowArea
+#define MAYBE_OverflowIndicatorCount DISABLED_OverflowIndicatorCount
+#define MAYBE_DrawOverflowAttention DISABLED_DrawOverflowAttention
 #endif
 
 IN_PROC_BROWSER_TEST_F(PanelOverflowBrowserTest, MAYBE_CheckPanelProperties) {
   // Create 3 panels that fit.
   Panel* panel1 = CreatePanelWithBounds("1", gfx::Rect(0, 0, 250, 200));
   Panel* panel2 = CreatePanelWithBounds("2", gfx::Rect(0, 0, 300, 200));
   Panel* panel3 = CreatePanelWithBounds("3", gfx::Rect(0, 0, 200, 200));
 
   // Create an overflow panel without waiting for it to be moved to overflow.
   // Check its properties before and after it is moved to overflow.
@@ skipping 34 matching lines @@
   EXPECT_TRUE(panel->draggable());
   panel->Close();
 }
 
 IN_PROC_BROWSER_TEST_F(PanelOverflowBrowserTest, MAYBE_CreateOverflowPanels) {
   PanelManager* panel_manager = PanelManager::GetInstance();
   PanelStrip* panel_strip = panel_manager->panel_strip();
   PanelOverflowStrip* panel_overflow_strip =
       panel_manager->panel_overflow_strip();
 
-  const int panel_widths[] = {
-      250, 260, 200,  // normal
-      255, 220        // overflow
-  };
-  CreateOverflowPanels(3, 2, panel_widths);
+  EXPECT_EQ(0, panel_manager->num_panels());
+  EXPECT_EQ(0, panel_strip->num_panels());
+  EXPECT_EQ(0, panel_overflow_strip->num_panels());
+  EXPECT_FALSE(panel_overflow_strip->overflow_indicator() &&
+      panel_overflow_strip->overflow_indicator()->GetCount());
 
-  std::vector<Panel*> panels = panel_manager->panels();
-  ASSERT_EQ(5u, panels.size());
+  // Create 3 normal panels.
+  Panel* panel0 = CreatePanelWithBounds("Panel0", gfx::Rect(0, 0, 250, 200));
+  Panel* panel1 = CreatePanelWithBounds("Panel1", gfx::Rect(0, 0, 260, 200));
+  Panel* panel2 = CreatePanelWithBounds("Panel2", gfx::Rect(0, 0, 200, 200));
+
+  EXPECT_EQ(3, panel_manager->num_panels());
+  EXPECT_EQ(3, panel_strip->num_panels());
+  EXPECT_EQ(0, panel_overflow_strip->num_panels());
+  EXPECT_FALSE(panel_overflow_strip->overflow_indicator() &&

[jennb, 2011/12/20 02:08:23]

Don't need the GetCount() check. Just verify that there should not be an
indicator.

[jianli, 2011/12/20 22:08:10]

Done.

+      panel_overflow_strip->overflow_indicator()->GetCount());
+  EXPECT_EQ(Panel::EXPANDED, panel0->expansion_state());
+  EXPECT_EQ(Panel::EXPANDED, panel1->expansion_state());
+  EXPECT_EQ(Panel::EXPANDED, panel2->expansion_state());
+
+  // Create 1 overflow panel.
+  CreatePanelParams params(
+      "Panel3", gfx::Rect(0, 0, 255, 200), SHOW_AS_INACTIVE);
+  Panel* panel3 = CreatePanelWithParams(params);
+
+  EXPECT_EQ(4, panel_manager->num_panels());
+  EXPECT_EQ(3, panel_strip->num_panels());
+  EXPECT_EQ(1, panel_overflow_strip->num_panels());
+  EXPECT_EQ(0, panel_overflow_strip->overflow_indicator()->GetCount());

[jennb, 2011/12/20 02:08:23]

Should still be no indicator as you don't need it yet.

[jianli, 2011/12/20 22:08:10]

Done.

+  EXPECT_EQ(Panel::IN_OVERFLOW, panel3->expansion_state());
+  EXPECT_TRUE(IsPanelVisible(panel3));
+
+  // Create 1 more overflow panel.
+  params.name = "Panel4";
+  Panel* panel4 = CreatePanelWithParams(params);
+
+  EXPECT_EQ(5, panel_manager->num_panels());
   EXPECT_EQ(3, panel_strip->num_panels());
   EXPECT_EQ(2, panel_overflow_strip->num_panels());
-  EXPECT_EQ(Panel::IN_OVERFLOW, panels[3]->expansion_state());
-  EXPECT_TRUE(IsPanelVisible(panels[3]));
-  EXPECT_EQ(Panel::IN_OVERFLOW, panels[4]->expansion_state());
-  EXPECT_TRUE(IsPanelVisible(panels[4]));
+  EXPECT_EQ(0, panel_overflow_strip->overflow_indicator()->GetCount());
+  EXPECT_EQ(Panel::IN_OVERFLOW, panel4->expansion_state());
+  EXPECT_TRUE(IsPanelVisible(panel4));
 
   PanelManager::GetInstance()->RemoveAll();
 }
 
 IN_PROC_BROWSER_TEST_F(PanelOverflowBrowserTest,
                        MAYBE_CreateMoreOverflowPanels) {
   PanelManager* panel_manager = PanelManager::GetInstance();
   PanelStrip* panel_strip = panel_manager->panel_strip();
   PanelOverflowStrip* panel_overflow_strip =
       panel_manager->panel_overflow_strip();
 
   const int panel_widths[] = {
       250, 260, 200,  // normal
       255, 220, 210,  // overflow
       220, 230        // overflow-on-overflow
   };
   CreateOverflowPanels(3, 5, panel_widths);
 
   std::vector<Panel*> panels = panel_manager->panels();
   ASSERT_EQ(8u, panels.size());
   EXPECT_EQ(3, panel_strip->num_panels());
   EXPECT_EQ(5, panel_overflow_strip->num_panels());
+  EXPECT_EQ(2, panel_overflow_strip->overflow_indicator()->GetCount());
   EXPECT_EQ(Panel::IN_OVERFLOW, panels[3]->expansion_state());
   EXPECT_TRUE(IsPanelVisible(panels[3]));
   EXPECT_EQ(Panel::IN_OVERFLOW, panels[4]->expansion_state());
   EXPECT_TRUE(IsPanelVisible(panels[4]));
   EXPECT_EQ(Panel::IN_OVERFLOW, panels[5]->expansion_state());
   EXPECT_TRUE(IsPanelVisible(panels[5]));
   EXPECT_EQ(Panel::IN_OVERFLOW, panels[6]->expansion_state());
   EXPECT_FALSE(IsPanelVisible(panels[6]));
   EXPECT_EQ(Panel::IN_OVERFLOW, panels[7]->expansion_state());
   EXPECT_FALSE(IsPanelVisible(panels[7]));
@@ skipping 364 matching lines @@
   expected_overflow_list.Add(panels[3], Panel::IN_OVERFLOW, true, false);
   expected_overflow_list.Add(panels[2], Panel::IN_OVERFLOW, false, false);
   expected_overflow_list.Add(panels[5], Panel::IN_OVERFLOW, false, false);
   EXPECT_EQ(expected_overflow_list, GetAllOverflowPanelData());
 
   PanelManager::GetInstance()->RemoveAll();
 }
 
 IN_PROC_BROWSER_TEST_F(PanelOverflowBrowserTest, MAYBE_HoverOverOverflowArea) {
   PanelManager* panel_manager = PanelManager::GetInstance();
-  PanelMouseWatcher* mouse_watcher = new TestPanelMouseWatcher();
-  panel_manager->SetMouseWatcherForTesting(mouse_watcher);
   PanelOverflowStrip* panel_overflow_strip =
       panel_manager->panel_overflow_strip();
   int iconified_width = panel_overflow_strip->current_display_width();
 
   // Create normal and overflow panels.
   //   normal:               P0, P1, P2
   //   overflow:             P3, P4, P5
   //   overflow-on-overflow: P6, P7
   const int panel_widths[] = {
       250, 260, 200,  // normal
@@ skipping 82 matching lines @@
       panels[7]->GetBounds().x(), panels[7]->GetBounds().y() - 1));
   EXPECT_EQ(iconified_width, panel_overflow_strip->current_display_width());
   EXPECT_EQ(iconified_width, panels[3]->GetBounds().width());
   EXPECT_EQ(iconified_width, panels[4]->GetBounds().width());
   EXPECT_EQ(iconified_width, panels[5]->GetBounds().width());
   EXPECT_EQ(0, panels[6]->GetBounds().width());
   EXPECT_EQ(0, panels[7]->GetBounds().width());
 
   panel_manager->RemoveAll();
 }
+
+IN_PROC_BROWSER_TEST_F(PanelOverflowBrowserTest, MAYBE_OverflowIndicatorCount) {
+  PanelManager* panel_manager = PanelManager::GetInstance();
+  PanelOverflowStrip* panel_overflow_strip =
+      panel_manager->panel_overflow_strip();
+
+  // Create normal and overflow panels.
+  //   normal:               P0, P1, P2
+  //   overflow:             P3, P4, P5
+  const int panel_widths[] = {
+      250, 250, 210,  // normal
+      250, 250, 260   // overflow
+  };
+  std::vector<Panel*> panels = CreateOverflowPanels(3, 3, panel_widths);
+  EXPECT_EQ(3, panel_overflow_strip->num_panels());
+  PanelOverflowIndicator* overflow_indicator =
+      panel_overflow_strip->overflow_indicator();
+  EXPECT_EQ(0, overflow_indicator->GetCount());

[jennb, 2011/12/20 02:08:23]

Expect no indicator.

[jianli, 2011/12/20 22:08:10]

Done.

+
+  // Create 5 overflow-on-overflow panels.
+  //   normal:               P0, P1, P2
+  //   overflow:             P3, P4, P5, (P6, P7, P8, P9, P10)
+  // The panels enclosed in parentheses are hidden.
+  int num_existing_panels = static_cast<int>(panels.size());

[jennb, 2011/12/20 02:08:23]

panel_manager->num_panels() ? then you won't have to cast.

[jianli, 2011/12/20 22:08:10]

Done.

+  for (int i = 0; i < 5; ++i) {
+    CreatePanelParams params(
+        MakePanelName(num_existing_panels + i),
+        gfx::Rect(0, 0, 250, 200),
+        SHOW_AS_INACTIVE);
+    Panel* panel = CreatePanelWithParams(params);
+    WaitForExpansionStateChanged(panel, Panel::IN_OVERFLOW);
+    EXPECT_EQ(i + 1, overflow_indicator->GetCount());
+    panels.push_back(panel);
+  }
+
+  // Expand the overflow area by moving mouse over it.
+  // Expect the overflow indicator count gets updated.
+  //   normal:               P0, P1, P2
+  //   overflow:             P3, P4, P5, P6, P7, P8, (P9, P10)
+  MoveMouseAndWaitForOverflowAnimationEnded(panels[3]->GetBounds().origin());
+  EXPECT_TRUE(IsPanelVisible(panels[6]));
+  EXPECT_TRUE(IsPanelVisible(panels[7]));
+  EXPECT_TRUE(IsPanelVisible(panels[8]));
+  EXPECT_FALSE(IsPanelVisible(panels[9]));
+  EXPECT_FALSE(IsPanelVisible(panels[10]));
+  EXPECT_EQ(2, overflow_indicator->GetCount());
+
+  // Close an overflow panel that makes one overflow-on-overflow panel become
+  // visible. Expect the overflow indicator count gets decreased by 1.
+  //   normal:               P0, P1, P2
+  //   overflow:             P4, P5, P6, P7, P8, P9, (P10)
+  CloseWindowAndWait(panels[3]->browser());
+  EXPECT_TRUE(IsPanelVisible(panels[6]));
+  EXPECT_TRUE(IsPanelVisible(panels[7]));
+  EXPECT_TRUE(IsPanelVisible(panels[8]));
+  EXPECT_TRUE(IsPanelVisible(panels[9]));
+  EXPECT_FALSE(IsPanelVisible(panels[10]));
+  EXPECT_EQ(1, overflow_indicator->GetCount());
+
+  // Shrunk the overflow area by stopping hovering the mouse over the overflow

[jennb, 2011/12/20 02:08:23]

Shrink

[jianli, 2011/12/20 22:08:10]

Done.

+  // area. Expect the overflow indicator count gets updated.
+  //   normal:               P0, P1, P2
+  //   overflow:             P4, P5, P6, (P7, P8, P9, P10)
+  MoveMouseAndWaitForOverflowAnimationEnded(gfx::Point(
+      panels[4]->GetBounds().right() + 5, panels[4]->GetBounds().y()));
+  EXPECT_TRUE(IsPanelVisible(panels[6]));
+  EXPECT_FALSE(IsPanelVisible(panels[7]));
+  EXPECT_FALSE(IsPanelVisible(panels[8]));
+  EXPECT_FALSE(IsPanelVisible(panels[9]));
+  EXPECT_FALSE(IsPanelVisible(panels[10]));
+  EXPECT_EQ(4, overflow_indicator->GetCount());
+
+  // Close an overflow panel.
+  // Expect the overflow indicator count gets decreased by 1.
+  //   normal:               P0, P1, P2
+  //   overflow:             P5, P6, P7, (P8, P9, P10)
+  CloseWindowAndWait(panels[4]->browser());
+  EXPECT_TRUE(IsPanelVisible(panels[6]));
+  EXPECT_TRUE(IsPanelVisible(panels[7]));
+  EXPECT_FALSE(IsPanelVisible(panels[8]));
+  EXPECT_FALSE(IsPanelVisible(panels[9]));
+  EXPECT_FALSE(IsPanelVisible(panels[10]));
+  EXPECT_EQ(3, overflow_indicator->GetCount());
+
+  // Activating a big overflow panel will cause 2 normal panels to move to the
+  // oevrflow area and also get the top visivle overflow panel bumped to the

[jennb, 2011/12/20 02:08:23]

visivle

[jianli, 2011/12/20 22:08:10]

Done.

+  // overflow-on-overflow.
+  // Expect the overflow indicator count gets increased by 1.
+  //   normal:               P0, P5
+  //   overflow:             P1, P2, P6, (P7, P8, P9, P10)
+  panels[5]->Activate();
+  WaitForPanelActiveState(panels[5], SHOW_AS_ACTIVE);
+  WaitForExpansionStateChanged(panels[5], Panel::EXPANDED);
+  EXPECT_TRUE(IsPanelVisible(panels[6]));
+  EXPECT_FALSE(IsPanelVisible(panels[7]));
+  EXPECT_FALSE(IsPanelVisible(panels[8]));
+  EXPECT_FALSE(IsPanelVisible(panels[9]));
+  EXPECT_FALSE(IsPanelVisible(panels[10]));
+  EXPECT_EQ(4, overflow_indicator->GetCount());
+
+  panel_manager->RemoveAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelOverflowBrowserTest, MAYBE_DrawOverflowAttention) {

[jennb, 2011/12/20 02:08:23]

Very thorough coverage of many scenarios!

+  PanelManager* panel_manager = PanelManager::GetInstance();
+  PanelStrip* panel_strip = panel_manager->panel_strip();
+  PanelOverflowStrip* overflow_strip = panel_manager->panel_overflow_strip();
+
+  // Create normal and overflow panels.
+  //   normal:               P0, P1, P2, P3
+  //   overflow:             P4, P5, P6, (P7, P8, P9, P10, P11)
+  // The panels enclosed in parentheses are hidden.
+  const int panel_widths[] = {
+      100, 210, 210, 210,  // normal
+      210, 260, 210,       // overflow
+      210, 210, 210,       // overflow-on-overflow on shrunk
+      210, 210             // overflow-on-overflow on expanded
+  };
+  std::vector<Panel*> panels = CreateOverflowPanels(4, 8, panel_widths);
+  EXPECT_EQ(4, panel_strip->num_panels());
+  EXPECT_EQ(8, overflow_strip->num_panels());
+  PanelOverflowIndicator* overflow_indicator =
+      overflow_strip->overflow_indicator();
+
+  // Draw attention for an overflow panel.

[jennb, 2011/12/20 02:08:23]

a visible overflow panel

[jianli, 2011/12/20 22:08:10]

Done.

+  // Expect no impact to the overflow indicator.
+  //   normal:               P0, P1, P2, P3
+  //   overflow:             P4, *P5, P6, (P7, P8, P9, P10, P11)
+  EXPECT_FALSE(panels[5]->IsDrawingAttention());
+  panels[5]->FlashFrame();
+  EXPECT_TRUE(panels[5]->IsDrawingAttention());
+  EXPECT_FALSE(overflow_indicator->IsDrawingAttention());
+
+  // Activating this overflow panel will clear its attention.
+  // Expect no impact to the overflow indicator.
+  //   normal:               P0, P1, P2, P5
+  //   overflow:             P3, P4, P6, (P7, P8, P9, P10, P11)
+  panels[5]->Activate();
+  WaitForPanelActiveState(panels[5], SHOW_AS_ACTIVE);
+  EXPECT_FALSE(panels[5]->IsDrawingAttention());
+  EXPECT_FALSE(overflow_indicator->IsDrawingAttention());
+
+  // Draw attention for an overflow-on-overflow panel.
+  // Expect the overflow indicator is showing attention.
+  //   normal:               P0, P1, P2, P5
+  //   overflow:             P3, P4, P6, (P7, *P8, P9, P10, P11)
+  EXPECT_FALSE(panels[8]->IsDrawingAttention());
+  panels[8]->FlashFrame();
+  EXPECT_TRUE(panels[8]->IsDrawingAttention());
+  EXPECT_TRUE(overflow_indicator->IsDrawingAttention());
+
+  // Draw attention for another overflow-on-overflow panel.
+  // Expect the overflow indicator is still showing attention.
+  //   normal:               P0, P1, P2, P5
+  //   overflow:             P3, P4, P6, (P7, *P8, P9, *P10, P11)
+  EXPECT_FALSE(panels[10]->IsDrawingAttention());
+  panels[10]->FlashFrame();
+  EXPECT_TRUE(panels[10]->IsDrawingAttention());
+  EXPECT_TRUE(overflow_indicator->IsDrawingAttention());
+
+  // Stop drawing attention for an overflow-on-overflow panel by activating it.
+  // Expect the overflow indicator is still showing attention.
+  //   normal:               P0, P1, P2, P8
+  //   overflow:             P5, P3, P4, (P6, P7, P9, *P10, P11)
+  panels[8]->Activate();
+  WaitForPanelActiveState(panels[8], SHOW_AS_ACTIVE);
+  EXPECT_FALSE(panels[8]->IsDrawingAttention());
+  EXPECT_TRUE(overflow_indicator->IsDrawingAttention());
+
+  // Stop drawing attention for another overflow-on-overflow panel by activating
+  // it. Expect the overflow indicator is not showing attention.
+  //   normal:               P0, P1, P2, P10
+  //   overflow:             P8, P5, P3, (P4, P6, P7, P9, P11)
+  panels[10]->Activate();
+  WaitForPanelActiveState(panels[10], SHOW_AS_ACTIVE);
+  EXPECT_FALSE(panels[10]->IsDrawingAttention());
+  EXPECT_FALSE(overflow_indicator->IsDrawingAttention());
+
+  // Draw attention for the top overflow panel.
+  // Expect no impact to the overflow indicator.
+  //   normal:               P0, P1, P2, P10
+  //   overflow:             P8, P5, *P3, (P4, P6, P7, P9, P11)
+  EXPECT_TRUE(IsPanelVisible(panels[3]));
+  EXPECT_FALSE(panels[3]->IsDrawingAttention());
+  panels[3]->FlashFrame();
+  EXPECT_TRUE(panels[3]->IsDrawingAttention());
+  EXPECT_FALSE(overflow_indicator->IsDrawingAttention());
+
+  // Activating a big overflow panel will cause 2 normal panels to move to the
+  // overflow area and also get the top visible overflow panel bumped to the
+  // overflow-on-overflow.
+  // Expect the overflow indicator is showing attention.
+  //   normal:               P0, P1, P5
+  //   overflow:             P2, P10, P8, (*P3, P4, P6, P7, P9, P11)
+  panels[5]->Activate();
+  WaitForPanelActiveState(panels[5], SHOW_AS_ACTIVE);
+  WaitForExpansionStateChanged(panels[5], Panel::EXPANDED);
+  EXPECT_EQ(3, panel_strip->num_panels());
+  EXPECT_EQ(9, overflow_strip->num_panels());
+  EXPECT_FALSE(IsPanelVisible(panels[3]));
+  EXPECT_TRUE(panels[3]->IsDrawingAttention());
+  EXPECT_TRUE(overflow_indicator->IsDrawingAttention());
+
+  // Close an overflow panel that would move the first oveflow-on-overflow panel
+  // to become visible. Expect the overflow indicator is not showing attention.
+  //   normal:               P0, P1, P5
+  //   overflow:             P2, P10, P3, (P4, P6, P7, P9, P11)
+  CloseWindowAndWait(panels[8]->browser());
+  EXPECT_EQ(3, panel_strip->num_panels());
+  EXPECT_EQ(8, overflow_strip->num_panels());
+  EXPECT_TRUE(panels[3]->IsDrawingAttention());
+  EXPECT_FALSE(overflow_indicator->IsDrawingAttention());
+
+  panel_manager->RemoveAll();
+}