Made copies of existing Panel test files. No edits in any of the files. New files not added to .gyp…

chrome/browser/ui/panels/old_panel_drag_browsertest.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 "base/message_loop.h"
+#include "chrome/browser/ui/panels/base_panel_browser_test.h"
+#include "chrome/browser/ui/panels/detached_panel_strip.h"
+#include "chrome/browser/ui/panels/docked_panel_strip.h"
+#include "chrome/browser/ui/panels/native_panel.h"
+#include "chrome/browser/ui/panels/panel.h"
+#include "chrome/browser/ui/panels/panel_drag_controller.h"
+#include "chrome/browser/ui/panels/panel_manager.h"
+#include "chrome/browser/ui/panels/test_panel_mouse_watcher.h"
+
+class PanelDragBrowserTest : public BasePanelBrowserTest {
+ public:
+  PanelDragBrowserTest() : BasePanelBrowserTest() {
+  }
+
+  virtual ~PanelDragBrowserTest() {
+  }
+
+  virtual void SetUpOnMainThread() OVERRIDE {
+    BasePanelBrowserTest::SetUpOnMainThread();
+
+    // All the tests here assume using mocked 800x600 screen area for the
+    // primary monitor. Do the check now.
+    gfx::Rect primary_screen_area = PanelManager::GetInstance()->
+        display_settings_provider()->GetPrimaryScreenArea();
+    DCHECK(primary_screen_area.width() == 800);
+    DCHECK(primary_screen_area.height() == 600);
+  }
+
+  // Drag |panel| from its origin by the offset |delta|.
+  void DragPanelByDelta(Panel* panel, const gfx::Point& delta) {
+    scoped_ptr<NativePanelTesting> panel_testing(
+        NativePanelTesting::Create(panel->native_panel()));
+    gfx::Point mouse_location(panel->GetBounds().origin());
+    panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+    panel_testing->DragTitlebar(mouse_location.Add(delta));
+    panel_testing->FinishDragTitlebar();
+  }
+
+  // Drag |panel| from its origin to |new_mouse_location|.
+  void DragPanelToMouseLocation(Panel* panel,
+                                const gfx::Point& new_mouse_location) {
+    scoped_ptr<NativePanelTesting> panel_testing(
+        NativePanelTesting::Create(panel->native_panel()));
+    gfx::Point mouse_location(panel->GetBounds().origin());
+    panel_testing->PressLeftMouseButtonTitlebar(panel->GetBounds().origin());
+    panel_testing->DragTitlebar(new_mouse_location);
+    panel_testing->FinishDragTitlebar();
+  }
+
+  static gfx::Point GetDragDeltaToRemainDocked() {
+    return gfx::Point(
+        -5,
+        -(PanelDragController::GetDetachDockedPanelThreshold() / 2));
+  }
+
+  static gfx::Point GetDragDeltaToDetach() {
+    return gfx::Point(
+        -20,
+        -(PanelDragController::GetDetachDockedPanelThreshold() + 20));
+  }
+
+  static gfx::Point GetDragDeltaToRemainDetached(Panel* panel) {
+    int distance = panel->manager()->docked_strip()->display_area().bottom() -
+                   panel->GetBounds().bottom();
+    return gfx::Point(
+        -5,
+        distance - PanelDragController::GetDockDetachedPanelThreshold() * 2);
+  }
+
+  static gfx::Point GetDragDeltaToAttach(Panel* panel) {
+    int distance = panel->manager()->docked_strip()->display_area().bottom() -
+                   panel->GetBounds().bottom();
+    return gfx::Point(
+        -20,
+        distance - PanelDragController::GetDockDetachedPanelThreshold() / 2);
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, DragOneDockedPanel) {
+  static const int big_delta_x = 70;
+  static const int big_delta_y = 30;  // Do not exceed the threshold to detach.
+
+  Panel* panel = CreateDockedPanel("1", gfx::Rect(0, 0, 100, 100));
+  scoped_ptr<NativePanelTesting> panel_testing(
+      NativePanelTesting::Create(panel->native_panel()));
+  gfx::Rect panel_old_bounds = panel->GetBounds();
+
+  // Drag left.
+  gfx::Point mouse_location = panel_old_bounds.origin();
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  mouse_location.Offset(-big_delta_x, 0);
+  panel_testing->DragTitlebar(mouse_location);
+  gfx::Rect panel_new_bounds = panel_old_bounds;
+  panel_new_bounds.Offset(-big_delta_x, 0);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  panel_testing->FinishDragTitlebar();
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  // Drag left and cancel.
+  mouse_location = panel_old_bounds.origin();
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  mouse_location.Offset(-big_delta_x, 0);
+  panel_testing->DragTitlebar(mouse_location);
+  panel_new_bounds = panel_old_bounds;
+  panel_new_bounds.Offset(-big_delta_x, 0);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  panel_testing->CancelDragTitlebar();
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  // Drag right.
+  mouse_location = panel_old_bounds.origin();
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  mouse_location.Offset(big_delta_x, 0);
+  panel_testing->DragTitlebar(mouse_location);
+  panel_new_bounds = panel_old_bounds;
+  panel_new_bounds.Offset(big_delta_x, 0);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  panel_testing->FinishDragTitlebar();
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  // Drag right and up.  Expect no vertical movement.
+  mouse_location = panel_old_bounds.origin();
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  mouse_location.Offset(big_delta_x, big_delta_y);
+  panel_testing->DragTitlebar(mouse_location);
+  panel_new_bounds = panel_old_bounds;
+  panel_new_bounds.Offset(big_delta_x, 0);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  panel_testing->FinishDragTitlebar();
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  // Drag up.  Expect no movement on drag.
+  mouse_location = panel_old_bounds.origin();
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  mouse_location.Offset(0, -big_delta_y);
+  panel_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  panel_testing->FinishDragTitlebar();
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  // Drag down.  Expect no movement on drag.
+  mouse_location = panel_old_bounds.origin();
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  mouse_location.Offset(0, big_delta_y);
+  panel_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  panel_testing->FinishDragTitlebar();
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  PanelManager::GetInstance()->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, DragTwoDockedPanels) {
+  static const gfx::Point small_delta(10, 0);
+
+  Panel* panel1 = CreateDockedPanel("1", gfx::Rect(0, 0, 100, 100));
+  Panel* panel2 = CreateDockedPanel("2", gfx::Rect(0, 0, 100, 100));
+  scoped_ptr<NativePanelTesting> panel1_testing(
+      NativePanelTesting::Create(panel1->native_panel()));
+  scoped_ptr<NativePanelTesting> panel2_testing(
+      NativePanelTesting::Create(panel2->native_panel()));
+  gfx::Point position1 = panel1->GetBounds().origin();
+  gfx::Point position2 = panel2->GetBounds().origin();
+
+  // Drag right panel towards left with small delta.
+  // Expect no shuffle: P1 P2
+  gfx::Point mouse_location = position1;
+  panel1_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(position1, panel1->GetBounds().origin());
+  EXPECT_EQ(position2, panel2->GetBounds().origin());
+
+  mouse_location = mouse_location.Subtract(small_delta);
+  panel1_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(mouse_location, panel1->GetBounds().origin());
+  EXPECT_EQ(position2, panel2->GetBounds().origin());
+
+  panel1_testing->FinishDragTitlebar();
+  EXPECT_EQ(position1, panel1->GetBounds().origin());
+  EXPECT_EQ(position2, panel2->GetBounds().origin());
+
+  // Drag right panel towards left with big delta.
+  // Expect shuffle: P2 P1
+  mouse_location = position1;
+  panel1_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(position1, panel1->GetBounds().origin());
+  EXPECT_EQ(position2, panel2->GetBounds().origin());
+
+  mouse_location = position2.Add(gfx::Point(1, 0));
+  panel1_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(mouse_location, panel1->GetBounds().origin());
+  EXPECT_EQ(position1, panel2->GetBounds().origin());
+
+  panel1_testing->FinishDragTitlebar();
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position1, panel2->GetBounds().origin());
+
+  // Drag left panel towards right with small delta.
+  // Expect no shuffle: P2 P1
+  mouse_location = position2;
+  panel1_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position1, panel2->GetBounds().origin());
+
+  mouse_location = mouse_location.Add(small_delta);
+  panel1_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(mouse_location, panel1->GetBounds().origin());
+  EXPECT_EQ(position1, panel2->GetBounds().origin());
+
+  panel1_testing->FinishDragTitlebar();
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position1, panel2->GetBounds().origin());
+
+  // Drag left panel towards right with big delta.
+  // Expect shuffle: P1 P2
+  mouse_location = position2;
+  panel1_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position1, panel2->GetBounds().origin());
+
+  mouse_location = position1.Add(gfx::Point(1, 0));
+  panel1_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(mouse_location, panel1->GetBounds().origin());
+  EXPECT_EQ(position2, panel2->GetBounds().origin());
+
+  panel1_testing->FinishDragTitlebar();
+  EXPECT_EQ(position1, panel1->GetBounds().origin());
+  EXPECT_EQ(position2, panel2->GetBounds().origin());
+
+  // Drag right panel towards left with big delta and then cancel the drag.
+  // Expect shuffle after drag:   P2 P1
+  // Expect shuffle after cancel: P1 P2
+  mouse_location = position1;
+  panel1_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(position1, panel1->GetBounds().origin());
+  EXPECT_EQ(position2, panel2->GetBounds().origin());
+
+  mouse_location = position2.Add(gfx::Point(1, 0));
+  panel1_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(mouse_location, panel1->GetBounds().origin());
+  EXPECT_EQ(position1, panel2->GetBounds().origin());
+
+  panel1_testing->CancelDragTitlebar();
+  EXPECT_EQ(position1, panel1->GetBounds().origin());
+  EXPECT_EQ(position2, panel2->GetBounds().origin());
+
+  PanelManager::GetInstance()->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, DragThreeDockedPanels) {
+  Panel* panel1 = CreateDockedPanel("1", gfx::Rect(0, 0, 100, 100));
+  Panel* panel2 = CreateDockedPanel("2", gfx::Rect(0, 0, 100, 100));
+  Panel* panel3 = CreateDockedPanel("3", gfx::Rect(0, 0, 100, 100));
+  scoped_ptr<NativePanelTesting> panel2_testing(
+      NativePanelTesting::Create(panel2->native_panel()));
+  scoped_ptr<NativePanelTesting> panel3_testing(
+      NativePanelTesting::Create(panel3->native_panel()));
+  gfx::Point position1 = panel1->GetBounds().origin();
+  gfx::Point position2 = panel2->GetBounds().origin();
+  gfx::Point position3 = panel3->GetBounds().origin();
+
+  // Drag leftmost panel to become the rightmost in 2 drags. Each drag will
+  // shuffle one panel.
+  // Expect shuffle after 1st drag: P1 P3 P2
+  // Expect shuffle after 2nd drag: P3 P1 P2
+  gfx::Point mouse_location = position3;
+  panel3_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(position1, panel1->GetBounds().origin());
+  EXPECT_EQ(position2, panel2->GetBounds().origin());
+  EXPECT_EQ(position3, panel3->GetBounds().origin());
+
+  mouse_location = position2.Add(gfx::Point(1, 0));
+  panel3_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(position1, panel1->GetBounds().origin());
+  EXPECT_EQ(position3, panel2->GetBounds().origin());
+  EXPECT_EQ(mouse_location, panel3->GetBounds().origin());
+
+  mouse_location = position1.Add(gfx::Point(1, 0));
+  panel3_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position3, panel2->GetBounds().origin());
+  EXPECT_EQ(mouse_location, panel3->GetBounds().origin());
+
+  panel3_testing->FinishDragTitlebar();
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position3, panel2->GetBounds().origin());
+  EXPECT_EQ(position1, panel3->GetBounds().origin());
+
+  // Drag rightmost panel to become the leftmost in 2 drags and then cancel the
+  // drag. Each drag will shuffle one panel and the cancellation will restore
+  // all panels.
+  // Expect shuffle after 1st drag: P1 P3 P2
+  // Expect shuffle after 2nd drag: P1 P2 P3
+  // Expect shuffle after cancel:   P3 P1 P2
+  mouse_location = position1;
+  panel3_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position3, panel2->GetBounds().origin());
+  EXPECT_EQ(position1, panel3->GetBounds().origin());
+
+  mouse_location = position2.Add(gfx::Point(1, 0));
+  panel3_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(position1, panel1->GetBounds().origin());
+  EXPECT_EQ(position3, panel2->GetBounds().origin());
+  EXPECT_EQ(mouse_location, panel3->GetBounds().origin());
+
+  mouse_location = position3.Add(gfx::Point(1, 0));
+  panel3_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(position1, panel1->GetBounds().origin());
+  EXPECT_EQ(position2, panel2->GetBounds().origin());
+  EXPECT_EQ(mouse_location, panel3->GetBounds().origin());
+
+  panel3_testing->CancelDragTitlebar();
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position3, panel2->GetBounds().origin());
+  EXPECT_EQ(position1, panel3->GetBounds().origin());
+
+  // Drag leftmost panel to become the rightmost in a single drag. The drag will
+  // shuffle 2 panels at a time.
+  // Expect shuffle: P2 P3 P1
+  mouse_location = position3;
+  panel2_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position3, panel2->GetBounds().origin());
+  EXPECT_EQ(position1, panel3->GetBounds().origin());
+
+  mouse_location = position1.Add(gfx::Point(1, 0));
+  panel2_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(position3, panel1->GetBounds().origin());
+  EXPECT_EQ(mouse_location, panel2->GetBounds().origin());
+  EXPECT_EQ(position2, panel3->GetBounds().origin());
+
+  panel2_testing->FinishDragTitlebar();
+  EXPECT_EQ(position3, panel1->GetBounds().origin());
+  EXPECT_EQ(position1, panel2->GetBounds().origin());
+  EXPECT_EQ(position2, panel3->GetBounds().origin());
+
+  // Drag rightmost panel to become the leftmost in a single drag. The drag will
+  // shuffle 2 panels at a time.
+  // Expect shuffle: P3 P1 P2
+  mouse_location = position1;
+  panel2_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(position3, panel1->GetBounds().origin());
+  EXPECT_EQ(position1, panel2->GetBounds().origin());
+  EXPECT_EQ(position2, panel3->GetBounds().origin());
+
+  mouse_location = position3.Add(gfx::Point(1, 0));
+  panel2_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(mouse_location, panel2->GetBounds().origin());
+  EXPECT_EQ(position1, panel3->GetBounds().origin());
+
+  panel2_testing->FinishDragTitlebar();
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position3, panel2->GetBounds().origin());
+  EXPECT_EQ(position1, panel3->GetBounds().origin());
+
+  // Drag rightmost panel to become the leftmost in a single drag and then
+  // cancel the drag. The drag will shuffle 2 panels and the cancellation will
+  // restore all panels.
+  // Expect shuffle after drag:   P1 P2 P3
+  // Expect shuffle after cancel: P3 P1 P2
+  mouse_location = position1;
+  panel3_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position3, panel2->GetBounds().origin());
+  EXPECT_EQ(position1, panel3->GetBounds().origin());
+
+  mouse_location = position3.Add(gfx::Point(1, 0));
+  panel3_testing->DragTitlebar(mouse_location);
+  EXPECT_EQ(position1, panel1->GetBounds().origin());
+  EXPECT_EQ(position2, panel2->GetBounds().origin());
+  EXPECT_EQ(mouse_location, panel3->GetBounds().origin());
+
+  panel3_testing->CancelDragTitlebar();
+  EXPECT_EQ(position2, panel1->GetBounds().origin());
+  EXPECT_EQ(position3, panel2->GetBounds().origin());
+  EXPECT_EQ(position1, panel3->GetBounds().origin());
+
+  PanelManager::GetInstance()->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, DragMinimizedPanel) {
+  // We'll simulate mouse movements for test.
+  PanelMouseWatcher* mouse_watcher = new TestPanelMouseWatcher();
+  PanelManager::GetInstance()->SetMouseWatcherForTesting(mouse_watcher);
+
+  Panel* panel = CreatePanel("panel1");
+  scoped_ptr<NativePanelTesting> panel_testing(
+      NativePanelTesting::Create(panel->native_panel()));
+
+  panel->Minimize();
+  EXPECT_EQ(Panel::MINIMIZED, panel->expansion_state());
+
+  // Hover over minimized panel to bring up titlebar.
+  gfx::Point hover_point(panel->GetBounds().origin());
+  MoveMouseAndWaitForExpansionStateChange(panel, hover_point);
+  EXPECT_EQ(Panel::TITLE_ONLY, panel->expansion_state());
+
+  // Verify we can drag a minimized panel.
+  gfx::Rect panel_old_bounds = panel->GetBounds();
+  gfx::Point mouse_location = panel_old_bounds.origin();
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+  EXPECT_EQ(Panel::TITLE_ONLY, panel->expansion_state());
+
+  mouse_location.Offset(-70, 0);
+  panel_testing->DragTitlebar(mouse_location);
+  gfx::Rect panel_new_bounds = panel_old_bounds;
+  panel_new_bounds.Offset(-70, 0);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+  EXPECT_EQ(Panel::TITLE_ONLY, panel->expansion_state());
+
+  // Verify panel returns to fully minimized state after dragging ends once
+  // mouse moves away from panel.
+  panel_testing->FinishDragTitlebar();
+  EXPECT_EQ(Panel::TITLE_ONLY, panel->expansion_state());
+
+  MoveMouseAndWaitForExpansionStateChange(panel, mouse_location);
+  EXPECT_EQ(Panel::MINIMIZED, panel->expansion_state());
+
+  panel->Close();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest,
+                       DragMinimizedPanelWhileDrawingAttention) {
+  // We'll simulate mouse movements for test.
+  PanelMouseWatcher* mouse_watcher = new TestPanelMouseWatcher();
+  PanelManager::GetInstance()->SetMouseWatcherForTesting(mouse_watcher);
+
+  Panel* panel = CreatePanel("panel1");
+  scoped_ptr<NativePanelTesting> panel_testing(
+      NativePanelTesting::Create(panel->native_panel()));
+  CreatePanel("panel2");
+
+  panel->Minimize();
+  EXPECT_EQ(Panel::MINIMIZED, panel->expansion_state());
+
+  panel->FlashFrame(true);
+  EXPECT_TRUE(panel->IsDrawingAttention());
+  EXPECT_EQ(Panel::TITLE_ONLY, panel->expansion_state());
+
+  // Drag the panel. Verify panel stays in title-only state after attention is
+  // cleared because it is being dragged.
+  gfx::Rect panel_old_bounds = panel->GetBounds();
+  gfx::Point mouse_location = panel_old_bounds.origin();
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+  EXPECT_EQ(Panel::TITLE_ONLY, panel->expansion_state());
+
+  mouse_location.Offset(-70, 0);
+  panel_testing->DragTitlebar(mouse_location);
+  gfx::Rect panel_new_bounds = panel_old_bounds;
+  panel_new_bounds.Offset(-70, 0);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  panel->FlashFrame(false);
+  EXPECT_FALSE(panel->IsDrawingAttention());
+  EXPECT_EQ(Panel::TITLE_ONLY, panel->expansion_state());
+
+  // Verify panel returns to fully minimized state after dragging ends once
+  // mouse moves away from the panel.
+  panel_testing->FinishDragTitlebar();
+  EXPECT_EQ(Panel::TITLE_ONLY, panel->expansion_state());
+
+  mouse_location.Offset(0, -50);
+  MoveMouseAndWaitForExpansionStateChange(panel, mouse_location);
+  EXPECT_EQ(Panel::MINIMIZED, panel->expansion_state());
+
+  PanelManager::GetInstance()->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, CloseDockedPanelOnDrag) {
+  PanelManager* panel_manager = PanelManager::GetInstance();
+  PanelDragController* drag_controller = panel_manager->drag_controller();
+  DockedPanelStrip* docked_strip = panel_manager->docked_strip();
+
+  // Create 4 docked panels.
+  // We have:  P4  P3  P2  P1
+  Panel* panel1 = CreatePanelWithBounds("Panel1", gfx::Rect(0, 0, 100, 100));
+  Panel* panel2 = CreatePanelWithBounds("Panel2", gfx::Rect(0, 0, 100, 100));
+  Panel* panel3 = CreatePanelWithBounds("Panel3", gfx::Rect(0, 0, 100, 100));
+  Panel* panel4 = CreatePanelWithBounds("Panel4", gfx::Rect(0, 0, 100, 100));
+  ASSERT_EQ(4, docked_strip->num_panels());
+
+  scoped_ptr<NativePanelTesting> panel1_testing(
+      NativePanelTesting::Create(panel1->native_panel()));
+  gfx::Point position1 = panel1->GetBounds().origin();
+  gfx::Point position2 = panel2->GetBounds().origin();
+  gfx::Point position3 = panel3->GetBounds().origin();
+  gfx::Point position4 = panel4->GetBounds().origin();
+
+  // Test the scenario: drag a panel, close another panel, cancel the drag.
+  {
+    std::vector<Panel*> panels;
+    gfx::Point panel1_new_position = position1;
+    panel1_new_position.Offset(-500, 0);
+
+    // Start dragging a panel.
+    // We have:  P1*  P4  P3  P2
+    gfx::Point mouse_location = panel1->GetBounds().origin();
+    panel1_testing->PressLeftMouseButtonTitlebar(mouse_location);
+    mouse_location.Offset(-500, -5);
+    panel1_testing->DragTitlebar(mouse_location);
+    EXPECT_TRUE(drag_controller->IsDragging());
+    EXPECT_EQ(panel1, drag_controller->dragging_panel());
+
+    ASSERT_EQ(4, docked_strip->num_panels());
+    panels = PanelManager::GetInstance()->panels();
+    EXPECT_EQ(panel2, panels[0]);
+    EXPECT_EQ(panel3, panels[1]);
+    EXPECT_EQ(panel4, panels[2]);
+    EXPECT_EQ(panel1, panels[3]);
+    EXPECT_EQ(position1, panel2->GetBounds().origin());
+    EXPECT_EQ(position2, panel3->GetBounds().origin());
+    EXPECT_EQ(position3, panel4->GetBounds().origin());
+    EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+
+    // Closing another panel while dragging in progress will keep the dragging
+    // panel intact.
+    // We have:  P1*  P4  P3
+    CloseWindowAndWait(panel2);
+    EXPECT_TRUE(drag_controller->IsDragging());
+    EXPECT_EQ(panel1, drag_controller->dragging_panel());
+
+    ASSERT_EQ(3, docked_strip->num_panels());
+    panels = PanelManager::GetInstance()->panels();
+    EXPECT_EQ(panel3, panels[0]);
+    EXPECT_EQ(panel4, panels[1]);
+    EXPECT_EQ(panel1, panels[2]);
+    EXPECT_EQ(position1, panel3->GetBounds().origin());
+    EXPECT_EQ(position2, panel4->GetBounds().origin());
+    EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+
+    // Cancel the drag.
+    // We have:  P4  P3  P1
+    panel1_testing->CancelDragTitlebar();
+    EXPECT_FALSE(drag_controller->IsDragging());
+
+    ASSERT_EQ(3, docked_strip->num_panels());
+    panels = PanelManager::GetInstance()->panels();
+    EXPECT_EQ(panel1, panels[0]);
+    EXPECT_EQ(panel3, panels[1]);
+    EXPECT_EQ(panel4, panels[2]);
+    EXPECT_EQ(position1, panel1->GetBounds().origin());
+    EXPECT_EQ(position2, panel3->GetBounds().origin());
+    EXPECT_EQ(position3, panel4->GetBounds().origin());
+  }
+
+  // Test the scenario: drag a panel, close another panel, end the drag.
+  {
+    std::vector<Panel*> panels;
+    gfx::Point panel1_new_position = position1;
+    panel1_new_position.Offset(-500, 0);
+
+    // Start dragging a panel.
+    // We have:  P1*  P4  P3
+    gfx::Point mouse_location = panel1->GetBounds().origin();
+    panel1_testing->PressLeftMouseButtonTitlebar(mouse_location);
+    mouse_location.Offset(-500, -5);
+    panel1_testing->DragTitlebar(mouse_location);
+    EXPECT_TRUE(drag_controller->IsDragging());
+    EXPECT_EQ(panel1, drag_controller->dragging_panel());
+
+    ASSERT_EQ(3, docked_strip->num_panels());
+    panels = PanelManager::GetInstance()->panels();
+    EXPECT_EQ(panel3, panels[0]);
+    EXPECT_EQ(panel4, panels[1]);
+    EXPECT_EQ(panel1, panels[2]);
+    EXPECT_EQ(position1, panel3->GetBounds().origin());
+    EXPECT_EQ(position2, panel4->GetBounds().origin());
+    EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+
+    // Closing another panel while dragging in progress will keep the dragging
+    // panel intact.
+    // We have:  P1*  P4
+    CloseWindowAndWait(panel3);
+    EXPECT_TRUE(drag_controller->IsDragging());
+    EXPECT_EQ(panel1, drag_controller->dragging_panel());
+
+    ASSERT_EQ(2, docked_strip->num_panels());
+    panels = PanelManager::GetInstance()->panels();
+    EXPECT_EQ(panel4, panels[0]);
+    EXPECT_EQ(panel1, panels[1]);
+    EXPECT_EQ(position1, panel4->GetBounds().origin());
+    EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+
+    // Finish the drag.
+    // We have:  P1  P4
+    panel1_testing->FinishDragTitlebar();
+    EXPECT_FALSE(drag_controller->IsDragging());
+
+    ASSERT_EQ(2, docked_strip->num_panels());
+    panels = PanelManager::GetInstance()->panels();
+    EXPECT_EQ(panel4, panels[0]);
+    EXPECT_EQ(panel1, panels[1]);
+    EXPECT_EQ(position1, panel4->GetBounds().origin());
+    EXPECT_EQ(position2, panel1->GetBounds().origin());
+  }
+
+  // Test the scenario: drag a panel and close the dragging panel.
+  {
+    std::vector<Panel*> panels;
+    gfx::Point panel1_new_position = position2;
+    panel1_new_position.Offset(-500, 0);
+
+    // Start dragging a panel again.
+    // We have:  P1*  P4
+    gfx::Point mouse_location = panel1->GetBounds().origin();
+    panel1_testing->PressLeftMouseButtonTitlebar(mouse_location);
+    mouse_location.Offset(-500, -5);
+    panel1_testing->DragTitlebar(mouse_location);
+    EXPECT_TRUE(drag_controller->IsDragging());
+    EXPECT_EQ(panel1, drag_controller->dragging_panel());
+    EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+
+    ASSERT_EQ(2, docked_strip->num_panels());
+    panels = PanelManager::GetInstance()->panels();
+    EXPECT_EQ(panel4, panels[0]);
+    EXPECT_EQ(panel1, panels[1]);
+    EXPECT_EQ(position1, panel4->GetBounds().origin());
+
+    // Closing the dragging panel should end the drag.
+    // We have:  P4
+    CloseWindowAndWait(panel1);
+    EXPECT_FALSE(drag_controller->IsDragging());
+
+    ASSERT_EQ(1, docked_strip->num_panels());
+    panels = PanelManager::GetInstance()->panels();
+    EXPECT_EQ(panel4, panels[0]);
+    EXPECT_EQ(position1, panel4->GetBounds().origin());
+  }
+
+  panel_manager->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, DragOneDetachedPanel) {
+  Panel* panel = CreateDetachedPanel("1", gfx::Rect(300, 200, 250, 200));
+
+  // Test that the detached panel can be dragged almost anywhere except getting
+  // close to the bottom of the docked area to trigger the attach.
+  scoped_ptr<NativePanelTesting> panel_testing(
+      NativePanelTesting::Create(panel->native_panel()));
+  gfx::Point origin = panel->GetBounds().origin();
+
+  panel_testing->PressLeftMouseButtonTitlebar(origin);
+  EXPECT_EQ(origin, panel->GetBounds().origin());
+
+  origin.Offset(-51, -102);
+  panel_testing->DragTitlebar(origin);
+  EXPECT_EQ(origin, panel->GetBounds().origin());
+
+  origin.Offset(37, 45);
+  panel_testing->DragTitlebar(origin);
+  EXPECT_EQ(origin, panel->GetBounds().origin());
+
+  panel_testing->FinishDragTitlebar();
+  EXPECT_EQ(origin, panel->GetBounds().origin());
+
+  // Test that cancelling the drag will return the panel the the original
+  // position.
+  gfx::Point original_position = panel->GetBounds().origin();
+  origin = original_position;
+
+  panel_testing->PressLeftMouseButtonTitlebar(origin);
+  EXPECT_EQ(origin, panel->GetBounds().origin());
+
+  origin.Offset(-51, -102);
+  panel_testing->DragTitlebar(origin);
+  EXPECT_EQ(origin, panel->GetBounds().origin());
+
+  origin.Offset(37, 45);
+  panel_testing->DragTitlebar(origin);
+  EXPECT_EQ(origin, panel->GetBounds().origin());
+
+  panel_testing->CancelDragTitlebar();
+  WaitForBoundsAnimationFinished(panel);
+  EXPECT_EQ(original_position, panel->GetBounds().origin());
+
+  PanelManager::GetInstance()->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, CloseDetachedPanelOnDrag) {
+  PanelManager* panel_manager = PanelManager::GetInstance();
+  PanelDragController* drag_controller = panel_manager->drag_controller();
+  DetachedPanelStrip* detached_strip = panel_manager->detached_strip();
+
+  // Create 4 detached panels.
+  Panel* panel1 = CreateDetachedPanel("1", gfx::Rect(100, 200, 100, 100));
+  Panel* panel2 = CreateDetachedPanel("2", gfx::Rect(200, 210, 110, 110));
+  Panel* panel3 = CreateDetachedPanel("3", gfx::Rect(300, 220, 120, 120));
+  Panel* panel4 = CreateDetachedPanel("4", gfx::Rect(400, 230, 130, 130));
+  ASSERT_EQ(4, detached_strip->num_panels());
+
+  scoped_ptr<NativePanelTesting> panel1_testing(
+      NativePanelTesting::Create(panel1->native_panel()));
+  gfx::Point panel1_old_position = panel1->GetBounds().origin();
+  gfx::Point panel2_position = panel2->GetBounds().origin();
+  gfx::Point panel3_position = panel3->GetBounds().origin();
+  gfx::Point panel4_position = panel4->GetBounds().origin();
+
+  // Test the scenario: drag a panel, close another panel, cancel the drag.
+  {
+    gfx::Point panel1_new_position = panel1_old_position;
+    panel1_new_position.Offset(-51, -102);
+
+    // Start dragging a panel.
+    panel1_testing->PressLeftMouseButtonTitlebar(panel1->GetBounds().origin());
+    panel1_testing->DragTitlebar(panel1_new_position);
+    EXPECT_TRUE(drag_controller->IsDragging());
+    EXPECT_EQ(panel1, drag_controller->dragging_panel());
+
+    ASSERT_EQ(4, detached_strip->num_panels());
+    EXPECT_TRUE(detached_strip->HasPanel(panel1));
+    EXPECT_TRUE(detached_strip->HasPanel(panel2));
+    EXPECT_TRUE(detached_strip->HasPanel(panel3));
+    EXPECT_TRUE(detached_strip->HasPanel(panel4));
+    EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+    EXPECT_EQ(panel2_position, panel2->GetBounds().origin());
+    EXPECT_EQ(panel3_position, panel3->GetBounds().origin());
+    EXPECT_EQ(panel4_position, panel4->GetBounds().origin());
+
+    // Closing another panel while dragging in progress will keep the dragging
+    // panel intact.
+    CloseWindowAndWait(panel2);
+    EXPECT_TRUE(drag_controller->IsDragging());
+    EXPECT_EQ(panel1, drag_controller->dragging_panel());
+
+    ASSERT_EQ(3, detached_strip->num_panels());
+    EXPECT_TRUE(detached_strip->HasPanel(panel1));
+    EXPECT_TRUE(detached_strip->HasPanel(panel3));
+    EXPECT_TRUE(detached_strip->HasPanel(panel4));
+    EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+    EXPECT_EQ(panel3_position, panel3->GetBounds().origin());
+    EXPECT_EQ(panel4_position, panel4->GetBounds().origin());
+
+    // Cancel the drag.
+    panel1_testing->CancelDragTitlebar();
+    WaitForBoundsAnimationFinished(panel1);
+    EXPECT_FALSE(drag_controller->IsDragging());
+
+    ASSERT_EQ(3, detached_strip->num_panels());
+    EXPECT_TRUE(detached_strip->HasPanel(panel1));
+    EXPECT_TRUE(detached_strip->HasPanel(panel3));
+    EXPECT_TRUE(detached_strip->HasPanel(panel4));
+    EXPECT_EQ(panel1_old_position, panel1->GetBounds().origin());
+    EXPECT_EQ(panel3_position, panel3->GetBounds().origin());
+    EXPECT_EQ(panel4_position, panel4->GetBounds().origin());
+  }
+
+  // Test the scenario: drag a panel, close another panel, end the drag.
+  {
+    gfx::Point panel1_new_position = panel1_old_position;
+    panel1_new_position.Offset(-51, -102);
+
+    // Start dragging a panel.
+    panel1_testing->PressLeftMouseButtonTitlebar(panel1->GetBounds().origin());
+    panel1_testing->DragTitlebar(panel1_new_position);
+    EXPECT_TRUE(drag_controller->IsDragging());
+    EXPECT_EQ(panel1, drag_controller->dragging_panel());
+
+    ASSERT_EQ(3, detached_strip->num_panels());
+    EXPECT_TRUE(detached_strip->HasPanel(panel1));
+    EXPECT_TRUE(detached_strip->HasPanel(panel3));
+    EXPECT_TRUE(detached_strip->HasPanel(panel4));
+    EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+    EXPECT_EQ(panel3_position, panel3->GetBounds().origin());
+    EXPECT_EQ(panel4_position, panel4->GetBounds().origin());
+
+    // Closing another panel while dragging in progress will keep the dragging
+    // panel intact.
+    CloseWindowAndWait(panel3);
+    EXPECT_TRUE(drag_controller->IsDragging());
+    EXPECT_EQ(panel1, drag_controller->dragging_panel());
+
+    ASSERT_EQ(2, detached_strip->num_panels());
+    EXPECT_TRUE(detached_strip->HasPanel(panel1));
+    EXPECT_TRUE(detached_strip->HasPanel(panel4));
+    EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+    EXPECT_EQ(panel4_position, panel4->GetBounds().origin());
+
+    // Finish the drag.
+    panel1_testing->FinishDragTitlebar();
+    EXPECT_FALSE(drag_controller->IsDragging());
+
+    ASSERT_EQ(2, detached_strip->num_panels());
+    EXPECT_TRUE(detached_strip->HasPanel(panel1));
+    EXPECT_TRUE(detached_strip->HasPanel(panel4));
+    EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+    EXPECT_EQ(panel4_position, panel4->GetBounds().origin());
+  }
+
+  // Test the scenario: drag a panel and close the dragging panel.
+  {
+    gfx::Point panel1_new_position = panel1->GetBounds().origin();
+    panel1_new_position.Offset(-51, -102);
+
+    // Start dragging a panel again.
+    panel1_testing->PressLeftMouseButtonTitlebar(panel1->GetBounds().origin());
+    panel1_testing->DragTitlebar(panel1_new_position);
+    EXPECT_TRUE(drag_controller->IsDragging());
+    EXPECT_EQ(panel1, drag_controller->dragging_panel());
+
+    ASSERT_EQ(2, detached_strip->num_panels());
+    EXPECT_TRUE(detached_strip->HasPanel(panel1));
+    EXPECT_TRUE(detached_strip->HasPanel(panel4));
+    EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+    EXPECT_EQ(panel4_position, panel4->GetBounds().origin());
+
+    // Closing the dragging panel should end the drag.
+    CloseWindowAndWait(panel1);
+    EXPECT_FALSE(drag_controller->IsDragging());
+
+    ASSERT_EQ(1, detached_strip->num_panels());
+    EXPECT_TRUE(detached_strip->HasPanel(panel4));
+    EXPECT_EQ(panel4_position, panel4->GetBounds().origin());
+  }
+
+  panel_manager->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, Detach) {
+  PanelManager* panel_manager = PanelManager::GetInstance();
+  DockedPanelStrip* docked_strip = panel_manager->docked_strip();
+  DetachedPanelStrip* detached_strip = panel_manager->detached_strip();
+
+  // Create one docked panel.
+  Panel* panel = CreateDockedPanel("1", gfx::Rect(0, 0, 100, 100));
+  ASSERT_EQ(1, docked_strip->num_panels());
+  ASSERT_EQ(0, detached_strip->num_panels());
+
+  gfx::Rect panel_old_bounds = panel->GetBounds();
+
+  // Press on title-bar.
+  scoped_ptr<NativePanelTesting> panel_testing(
+      NativePanelTesting::Create(panel->native_panel()));
+  gfx::Point mouse_location(panel->GetBounds().origin());
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+
+  // Drag up the panel in a small offset that does not trigger the detach.
+  // Expect that the panel is still docked and only x coordinate of its position
+  // is changed.
+  gfx::Point drag_delta_to_remain_docked = GetDragDeltaToRemainDocked();
+  mouse_location = mouse_location.Add(drag_delta_to_remain_docked);
+  panel_testing->DragTitlebar(mouse_location);
+  ASSERT_EQ(1, docked_strip->num_panels());
+  ASSERT_EQ(0, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DOCKED, panel->panel_strip()->type());
+  gfx::Rect panel_new_bounds = panel_old_bounds;
+  panel_new_bounds.Offset(drag_delta_to_remain_docked.x(), 0);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  // Continue dragging up the panel in big offset that triggers the detach.
+  // Expect that the panel is previewed as detached.
+  gfx::Point drag_delta_to_detach = GetDragDeltaToDetach();
+  mouse_location = mouse_location.Add(drag_delta_to_detach);
+  panel_testing->DragTitlebar(mouse_location);
+  ASSERT_EQ(0, docked_strip->num_panels());
+  ASSERT_EQ(1, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+  panel_new_bounds.Offset(
+      drag_delta_to_detach.x(),
+      drag_delta_to_detach.y() + drag_delta_to_remain_docked.y());
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  // Finish the drag.
+  // Expect that the panel stays as detached.
+  panel_testing->FinishDragTitlebar();
+  ASSERT_EQ(0, docked_strip->num_panels());
+  ASSERT_EQ(1, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  panel_manager->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, DetachAndCancel) {
+  PanelManager* panel_manager = PanelManager::GetInstance();
+  DockedPanelStrip* docked_strip = panel_manager->docked_strip();
+  DetachedPanelStrip* detached_strip = panel_manager->detached_strip();
+
+  // Create one docked panel.
+  Panel* panel = CreateDockedPanel("1", gfx::Rect(0, 0, 100, 100));
+  ASSERT_EQ(1, docked_strip->num_panels());
+  ASSERT_EQ(0, detached_strip->num_panels());
+
+  gfx::Rect panel_old_bounds = panel->GetBounds();
+
+  // Press on title-bar.
+  scoped_ptr<NativePanelTesting> panel_testing(
+      NativePanelTesting::Create(panel->native_panel()));
+  gfx::Point mouse_location(panel->GetBounds().origin());
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+
+  // Drag up the panel in a small offset that does not trigger the detach.
+  // Expect that the panel is still docked and only x coordinate of its position
+  // is changed.
+  gfx::Point drag_delta_to_remain_docked = GetDragDeltaToRemainDocked();
+  mouse_location = mouse_location.Add(drag_delta_to_remain_docked);
+  panel_testing->DragTitlebar(mouse_location);
+  ASSERT_EQ(1, docked_strip->num_panels());
+  ASSERT_EQ(0, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DOCKED, panel->panel_strip()->type());
+  gfx::Rect panel_new_bounds = panel_old_bounds;
+  panel_new_bounds.Offset(drag_delta_to_remain_docked.x(), 0);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  // Continue dragging up the panel in big offset that triggers the detach.
+  // Expect that the panel is previewed as detached.
+  gfx::Point drag_delta_to_detach = GetDragDeltaToDetach();
+  mouse_location = mouse_location.Add(drag_delta_to_detach);
+  panel_testing->DragTitlebar(mouse_location);
+  ASSERT_EQ(0, docked_strip->num_panels());
+  ASSERT_EQ(1, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+  panel_new_bounds.Offset(
+      drag_delta_to_detach.x(),
+      drag_delta_to_detach.y() + drag_delta_to_remain_docked.y());
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  // Cancel the drag.
+  // Expect that the panel is back as docked.
+  panel_testing->CancelDragTitlebar();
+  ASSERT_EQ(1, docked_strip->num_panels());
+  ASSERT_EQ(0, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DOCKED, panel->panel_strip()->type());
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  panel_manager->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, Attach) {
+  PanelManager* panel_manager = PanelManager::GetInstance();
+  DockedPanelStrip* docked_strip = panel_manager->docked_strip();
+  DetachedPanelStrip* detached_strip = panel_manager->detached_strip();
+
+  // Create one detached panel.
+  Panel* panel = CreateDetachedPanel("1", gfx::Rect(400, 300, 100, 100));
+  ASSERT_EQ(0, docked_strip->num_panels());
+  ASSERT_EQ(1, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+
+  gfx::Rect panel_old_bounds = panel->GetBounds();
+
+  // Press on title-bar.
+  scoped_ptr<NativePanelTesting> panel_testing(
+      NativePanelTesting::Create(panel->native_panel()));
+  gfx::Point mouse_location(panel->GetBounds().origin());
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+
+  // Drag down the panel but not close enough to the bottom of work area.
+  // Expect that the panel is still detached.
+  gfx::Point drag_delta_to_remain_detached =
+      GetDragDeltaToRemainDetached(panel);
+  mouse_location = mouse_location.Add(drag_delta_to_remain_detached);
+  panel_testing->DragTitlebar(mouse_location);
+  ASSERT_EQ(0, docked_strip->num_panels());
+  ASSERT_EQ(1, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+  gfx::Rect panel_new_bounds = panel_old_bounds;
+  panel_new_bounds.Offset(drag_delta_to_remain_detached);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  // Continue dragging down the panel to make it close enough to the bottom of
+  // work area.
+  // Expect that the panel is previewed as docked.
+  gfx::Point drag_delta_to_attach = GetDragDeltaToAttach(panel);
+  mouse_location = mouse_location.Add(drag_delta_to_attach);
+  panel_testing->DragTitlebar(mouse_location);
+  ASSERT_EQ(1, docked_strip->num_panels());
+  ASSERT_EQ(0, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DOCKED, panel->panel_strip()->type());
+  panel_new_bounds.Offset(drag_delta_to_attach);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  // Finish the drag.
+  // Expect that the panel stays as docked and moves to the final position.
+  panel_testing->FinishDragTitlebar();
+  ASSERT_EQ(1, docked_strip->num_panels());
+  ASSERT_EQ(0, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DOCKED, panel->panel_strip()->type());
+  panel_new_bounds.set_x(
+      docked_strip->StartingRightPosition() - panel_new_bounds.width());
+  panel_new_bounds.set_y(
+      docked_strip->display_area().bottom() - panel_new_bounds.height());
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  panel_manager->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, AttachAndCancel) {
+  PanelManager* panel_manager = PanelManager::GetInstance();
+  DockedPanelStrip* docked_strip = panel_manager->docked_strip();
+  DetachedPanelStrip* detached_strip = panel_manager->detached_strip();
+
+  // Create one detached panel.
+  Panel* panel = CreateDetachedPanel("1", gfx::Rect(400, 300, 100, 100));
+  ASSERT_EQ(0, docked_strip->num_panels());
+  ASSERT_EQ(1, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+
+  gfx::Rect panel_old_bounds = panel->GetBounds();
+
+  // Press on title-bar.
+  scoped_ptr<NativePanelTesting> panel_testing(
+      NativePanelTesting::Create(panel->native_panel()));
+  gfx::Point mouse_location(panel->GetBounds().origin());
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+
+  // Drag down the panel but not close enough to the bottom of work area.
+  // Expect that the panel is still detached.
+  gfx::Point drag_delta_to_remain_detached =
+      GetDragDeltaToRemainDetached(panel);
+  mouse_location = mouse_location.Add(drag_delta_to_remain_detached);
+  panel_testing->DragTitlebar(mouse_location);
+  ASSERT_EQ(0, docked_strip->num_panels());
+  ASSERT_EQ(1, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+  gfx::Rect panel_new_bounds = panel_old_bounds;
+  panel_new_bounds.Offset(drag_delta_to_remain_detached);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  // Continue dragging down the panel to make it close enough to the bottom of
+  // work area.
+  // Expect that the panel is previewed as docked.
+  gfx::Point drag_delta_to_attach = GetDragDeltaToAttach(panel);
+  mouse_location = mouse_location.Add(drag_delta_to_attach);
+  panel_testing->DragTitlebar(mouse_location);
+  ASSERT_EQ(1, docked_strip->num_panels());
+  ASSERT_EQ(0, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DOCKED, panel->panel_strip()->type());
+  panel_new_bounds.Offset(drag_delta_to_attach);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  // Cancel the drag.
+  // Expect that the panel is back as detached.
+  panel_testing->CancelDragTitlebar();
+  ASSERT_EQ(0, docked_strip->num_panels());
+  ASSERT_EQ(1, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  panel_manager->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, DetachAttachAndCancel) {
+  PanelManager* panel_manager = PanelManager::GetInstance();
+  DockedPanelStrip* docked_strip = panel_manager->docked_strip();
+  DetachedPanelStrip* detached_strip = panel_manager->detached_strip();
+
+  // Create one docked panel.
+  Panel* panel = CreateDockedPanel("1", gfx::Rect(0, 0, 100, 100));
+  ASSERT_EQ(1, docked_strip->num_panels());
+  ASSERT_EQ(0, detached_strip->num_panels());
+
+  gfx::Rect panel_old_bounds = panel->GetBounds();
+
+  // Press on title-bar.
+  scoped_ptr<NativePanelTesting> panel_testing(
+      NativePanelTesting::Create(panel->native_panel()));
+  gfx::Point mouse_location(panel->GetBounds().origin());
+  panel_testing->PressLeftMouseButtonTitlebar(mouse_location);
+
+  // Drag up the panel to trigger the detach.
+  // Expect that the panel is previewed as detached.
+  gfx::Point drag_delta_to_detach = GetDragDeltaToDetach();
+  mouse_location = mouse_location.Add(drag_delta_to_detach);
+  panel_testing->DragTitlebar(mouse_location);
+  ASSERT_EQ(0, docked_strip->num_panels());
+  ASSERT_EQ(1, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+  gfx::Rect panel_new_bounds = panel_old_bounds;
+  panel_new_bounds.Offset(drag_delta_to_detach);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  // Continue dragging down the panel to trigger the re-attach.
+  gfx::Point drag_delta_to_reattach = GetDragDeltaToAttach(panel);
+  mouse_location = mouse_location.Add(drag_delta_to_reattach);
+  panel_testing->DragTitlebar(mouse_location);
+  ASSERT_EQ(1, docked_strip->num_panels());
+  ASSERT_EQ(0, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DOCKED, panel->panel_strip()->type());
+  panel_new_bounds.Offset(drag_delta_to_reattach);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  // Continue dragging up the panel to trigger the detach again.
+  gfx::Point drag_delta_to_detach_again = GetDragDeltaToDetach();
+  mouse_location = mouse_location.Add(drag_delta_to_detach_again);
+  panel_testing->DragTitlebar(mouse_location);
+  ASSERT_EQ(0, docked_strip->num_panels());
+  ASSERT_EQ(1, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+  panel_new_bounds.Offset(drag_delta_to_detach_again);
+  EXPECT_EQ(panel_new_bounds, panel->GetBounds());
+
+  // Cancel the drag.
+  // Expect that the panel stays as docked.
+  panel_testing->CancelDragTitlebar();
+  ASSERT_EQ(1, docked_strip->num_panels());
+  ASSERT_EQ(0, detached_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DOCKED, panel->panel_strip()->type());
+  EXPECT_EQ(panel_old_bounds, panel->GetBounds());
+
+  panel_manager->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, DetachWithSqueeze) {
+  PanelManager* panel_manager = PanelManager::GetInstance();
+  DockedPanelStrip* docked_strip = panel_manager->docked_strip();
+  DetachedPanelStrip* detached_strip = panel_manager->detached_strip();
+
+  gfx::Point drag_delta_to_detach = GetDragDeltaToDetach();
+
+  // Create some docked panels.
+  //   docked:    P1  P2  P3  P4  P5
+  Panel* panel1 = CreateDockedPanel("1", gfx::Rect(0, 0, 200, 100));
+  Panel* panel2 = CreateDockedPanel("2", gfx::Rect(0, 0, 200, 100));
+  Panel* panel3 = CreateDockedPanel("3", gfx::Rect(0, 0, 200, 100));
+  Panel* panel4 = CreateDockedPanel("4", gfx::Rect(0, 0, 200, 100));
+  Panel* panel5 = CreateDockedPanel("5", gfx::Rect(0, 0, 200, 100));
+  ASSERT_EQ(0, detached_strip->num_panels());
+  ASSERT_EQ(5, docked_strip->num_panels());
+
+  // Drag to detach the middle docked panel.
+  // Expect to have:
+  //   detached:  P2
+  //   docked:    P1  P3  P4 P5
+  gfx::Point panel2_docked_position = panel2->GetBounds().origin();
+  DragPanelByDelta(panel2, drag_delta_to_detach);
+  ASSERT_EQ(1, detached_strip->num_panels());
+  ASSERT_EQ(4, docked_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DOCKED, panel1->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DETACHED, panel2->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel3->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel4->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel5->panel_strip()->type());
+  gfx::Point panel2_new_position =
+      panel2_docked_position.Add(drag_delta_to_detach);
+  EXPECT_EQ(panel2_new_position, panel2->GetBounds().origin());
+
+  // Drag to detach the left-most docked panel.
+  // Expect to have:
+  //   detached:  P2  P4
+  //   docked:    P1  P3  P5
+  gfx::Point panel4_docked_position = panel4->GetBounds().origin();
+  DragPanelByDelta(panel4, drag_delta_to_detach);
+  ASSERT_EQ(2, detached_strip->num_panels());
+  ASSERT_EQ(3, docked_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DOCKED, panel1->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DETACHED, panel2->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel3->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DETACHED, panel4->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel5->panel_strip()->type());
+  EXPECT_EQ(panel2_new_position, panel2->GetBounds().origin());
+  gfx::Point panel4_new_position =
+      panel4_docked_position.Add(drag_delta_to_detach);
+  EXPECT_EQ(panel4_new_position, panel4->GetBounds().origin());
+
+  // Drag to detach the right-most docked panel.
+  // Expect to have:
+  //   detached:  P1  P2  P4
+  //   docked:    P3  P5
+  gfx::Point docked_position1 = panel1->GetBounds().origin();
+  gfx::Point docked_position2 = panel3->GetBounds().origin();
+
+  DragPanelByDelta(panel1, drag_delta_to_detach);
+  ASSERT_EQ(3, detached_strip->num_panels());
+  ASSERT_EQ(2, docked_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel1->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DETACHED, panel2->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel3->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DETACHED, panel4->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel5->panel_strip()->type());
+  gfx::Point panel1_new_position = docked_position1.Add(drag_delta_to_detach);
+  EXPECT_EQ(panel1_new_position, panel1->GetBounds().origin());
+  EXPECT_EQ(panel2_new_position, panel2->GetBounds().origin());
+  EXPECT_EQ(panel4_new_position, panel4->GetBounds().origin());
+
+  // No more squeeze, docked panels should stay put.
+  EXPECT_EQ(docked_position1, panel3->GetBounds().origin());
+  EXPECT_EQ(panel1->GetBounds().width(), panel1->GetRestoredBounds().width());
+  EXPECT_EQ(docked_position2, panel5->GetBounds().origin());
+  EXPECT_EQ(panel2->GetBounds().width(), panel2->GetRestoredBounds().width());
+
+  panel_manager->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, AttachWithSqueeze) {
+  PanelManager* panel_manager = PanelManager::GetInstance();
+  DockedPanelStrip* docked_strip = panel_manager->docked_strip();
+  DetachedPanelStrip* detached_strip = panel_manager->detached_strip();
+
+  // Create some detached, docked panels.
+  //   detached:  P1  P2  P3
+  //   docked:    P4  P5  P6  P7
+  Panel* panel1 = CreateDetachedPanel("1", gfx::Rect(100, 300, 200, 100));
+  Panel* panel2 = CreateDetachedPanel("2", gfx::Rect(200, 300, 200, 100));
+  Panel* panel3 = CreateDetachedPanel("3", gfx::Rect(400, 300, 200, 100));
+  Panel* panel4 = CreateDockedPanel("4", gfx::Rect(0, 0, 200, 100));
+  Panel* panel5 = CreateDockedPanel("5", gfx::Rect(0, 0, 200, 100));
+  Panel* panel6 = CreateDockedPanel("6", gfx::Rect(0, 0, 200, 100));
+  Panel* panel7 = CreateDockedPanel("7", gfx::Rect(0, 0, 200, 100));
+  ASSERT_EQ(3, detached_strip->num_panels());
+  ASSERT_EQ(4, docked_strip->num_panels());
+
+  gfx::Point detached_position1 = panel1->GetBounds().origin();
+  gfx::Point detached_position2 = panel2->GetBounds().origin();
+  gfx::Point detached_position3 = panel3->GetBounds().origin();
+  gfx::Point docked_position4 = panel4->GetBounds().origin();
+  gfx::Point docked_position5 = panel5->GetBounds().origin();
+  gfx::Point docked_position6 = panel6->GetBounds().origin();
+  gfx::Point docked_position7 = panel7->GetBounds().origin();
+
+  // Drag to attach a detached panel between 2 docked panels.
+  // Expect to have:
+  //   detached:  P1  P2
+  //   docked:    P4  P3  P5  P6  P7
+  gfx::Point drag_to_location(panel5->GetBounds().x() + 10,
+                              panel5->GetBounds().y());
+  DragPanelToMouseLocation(panel3, drag_to_location);
+  ASSERT_EQ(2, detached_strip->num_panels());
+  ASSERT_EQ(5, docked_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel1->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DETACHED, panel2->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel3->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel4->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel5->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel6->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel7->panel_strip()->type());
+  EXPECT_EQ(detached_position1, panel1->GetBounds().origin());
+  EXPECT_EQ(detached_position2, panel2->GetBounds().origin());
+
+  // Wait for active states to settle.
+  MessageLoopForUI::current()->RunAllPending();
+
+  // Panel positions should have shifted because of the "squeeze" mode.
+  EXPECT_NE(docked_position4, panel4->GetBounds().origin());
+  EXPECT_LT(panel4->GetBounds().width(), panel4->GetRestoredBounds().width());
+  EXPECT_NE(docked_position5, panel5->GetBounds().origin());
+  EXPECT_LT(panel5->GetBounds().width(), panel5->GetRestoredBounds().width());
+
+#if defined(OS_WIN)
+  // The panel we dragged becomes the active one.
+  EXPECT_EQ(true, panel3->IsActive());
+  EXPECT_EQ(panel3->GetBounds().width(), panel3->GetRestoredBounds().width());
+
+  EXPECT_NE(docked_position6, panel6->GetBounds().origin());
+#else
+  // The last panel is active so these positions do not change.
+  // TODO (ABurago) this is wrong behavior, a panel should activate
+  // when it is dragged. Change the test when the behavior is fixed.
+  EXPECT_EQ(true, panel7->IsActive());
+  EXPECT_EQ(panel7->GetBounds().width(), panel7->GetRestoredBounds().width());
+
+  EXPECT_EQ(docked_position6, panel6->GetBounds().origin());
+#endif
+  EXPECT_EQ(docked_position7, panel7->GetBounds().origin());
+
+  // Drag to attach a detached panel to most-right.
+  // Expect to have:
+  //   detached:  P1
+  //   docked:    P2  P4  P3  P5  P6  P7
+  gfx::Point drag_to_location2(panel4->GetBounds().right() + 10,
+                               panel4->GetBounds().y());
+  DragPanelToMouseLocation(panel2, drag_to_location2);
+  ASSERT_EQ(1, detached_strip->num_panels());
+  ASSERT_EQ(6, docked_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DETACHED, panel1->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel2->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel3->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel4->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel5->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel6->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel7->panel_strip()->type());
+  EXPECT_EQ(detached_position1, panel1->GetBounds().origin());
+
+  // Drag to attach a detached panel to most-left.
+  // Expect to have:
+  //   docked:    P2  P4  P1  P3  P5  P6  P7
+  gfx::Point drag_to_location3(panel3->GetBounds().x() - 10,
+                               panel3->GetBounds().y());
+  DragPanelToMouseLocation(panel1, drag_to_location3);
+  ASSERT_EQ(0, detached_strip->num_panels());
+  ASSERT_EQ(7, docked_strip->num_panels());
+  EXPECT_EQ(PanelStrip::DOCKED, panel1->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel2->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel3->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel4->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel5->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel6->panel_strip()->type());
+  EXPECT_EQ(PanelStrip::DOCKED, panel7->panel_strip()->type());
+
+  panel_manager->CloseAll();
+}
+
+IN_PROC_BROWSER_TEST_F(PanelDragBrowserTest, DragDetachedPanelToTop) {
+  // Setup the test areas to have top-aligned bar excluded from work area.
+  const gfx::Rect primary_screen_area(0, 0, 800, 600);
+  const gfx::Rect work_area(0, 10, 800, 590);
+  SetTestingAreas(primary_screen_area, work_area);
+
+  PanelManager* panel_manager = PanelManager::GetInstance();
+  Panel* panel = CreateDetachedPanel("1", gfx::Rect(300, 200, 250, 200));
+
+  // Drag up the panel. Expect that the panel should not go outside the top of
+  // the work area.
+  gfx::Point drag_to_location(250, 0);
+  DragPanelToMouseLocation(panel, drag_to_location);
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+  EXPECT_EQ(drag_to_location.x(), panel->GetBounds().origin().x());
+  EXPECT_EQ(work_area.y(), panel->GetBounds().origin().y());
+
+  // Drag down the panel. Expect that the panel can be dragged without
+  // constraint.
+  drag_to_location = gfx::Point(280, 150);
+  DragPanelToMouseLocation(panel, drag_to_location);
+  EXPECT_EQ(PanelStrip::DETACHED, panel->panel_strip()->type());
+  EXPECT_EQ(drag_to_location, panel->GetBounds().origin());
+
+  panel_manager->CloseAll();
+}