(fix landed) Reland of name MaximizeMode to TabletMode

ash/wm/tablet_mode/tablet_mode_window_manager_unittest.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ash/wm/tablet_mode/tablet_mode_window_manager.h"
+
+#include <string>
+
+#include "ash/ash_switches.h"
+#include "ash/public/cpp/config.h"
+#include "ash/root_window_controller.h"
+#include "ash/screen_util.h"
+#include "ash/shelf/shelf.h"
+#include "ash/shell.h"
+#include "ash/shell_port.h"
+#include "ash/test/ash_test_base.h"
+#include "ash/test/shell_test_api.h"
+#include "ash/wm/mru_window_tracker.h"
+#include "ash/wm/overview/window_selector_controller.h"
+#include "ash/wm/switchable_windows.h"
+#include "ash/wm/tablet_mode/tablet_mode_controller.h"
+#include "ash/wm/window_properties.h"
+#include "ash/wm/window_state.h"
+#include "ash/wm/window_state_observer.h"
+#include "ash/wm/window_util.h"
+#include "ash/wm/wm_event.h"
+#include "ash/wm_window.h"
+#include "base/command_line.h"
+#include "base/strings/stringprintf.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/values.h"
+#include "services/ui/public/interfaces/window_manager_constants.mojom.h"
+#include "ui/aura/client/aura_constants.h"
+#include "ui/aura/test/test_window_delegate.h"
+#include "ui/aura/test/test_windows.h"
+#include "ui/aura/window.h"
+#include "ui/base/hit_test.h"
+#include "ui/events/test/event_generator.h"
+#include "ui/views/widget/widget.h"
+
+namespace ash {
+
+class TabletModeWindowManagerTest : public test::AshTestBase {
+ public:
+  TabletModeWindowManagerTest() {}
+  ~TabletModeWindowManagerTest() override {}
+
+  // Creates a window which has a fixed size.
+  aura::Window* CreateFixedSizeNonMaximizableWindow(
+      aura::client::WindowType type,
+      const gfx::Rect& bounds) {
+    return CreateWindowInWatchedContainer(type, bounds, gfx::Size(), false,
+                                          false);
+  }
+
+  // Creates a window which can not be maximized, but resized. |max_size|
+  // denotes the maximal possible size, if the size is empty, the window has no
+  // upper limit. Note: This function will only work with a single root window.
+  aura::Window* CreateNonMaximizableWindow(aura::client::WindowType type,
+                                           const gfx::Rect& bounds,
+                                           const gfx::Size& max_size) {
+    return CreateWindowInWatchedContainer(type, bounds, max_size, false, true);
+  }
+
+  // Creates a maximizable and resizable window.
+  aura::Window* CreateWindow(aura::client::WindowType type,
+                             const gfx::Rect bounds) {
+    return CreateWindowInWatchedContainer(type, bounds, gfx::Size(), true,
+                                          true);
+  }
+
+  // Creates a window which also has a widget.
+  aura::Window* CreateWindowWithWidget(const gfx::Rect& bounds) {
+    views::Widget* widget = new views::Widget();
+    views::Widget::InitParams params;
+    params.context = CurrentContext();
+    // Note: The widget will get deleted with the window.
+    widget->Init(params);
+    widget->Show();
+    aura::Window* window = widget->GetNativeWindow();
+    window->SetBounds(bounds);
+    window->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_NORMAL);
+
+    return window;
+  }
+
+  // Create the Maximized mode window manager.
+  TabletModeWindowManager* CreateTabletModeWindowManager() {
+    EXPECT_FALSE(tablet_mode_window_manager());
+    Shell::Get()->tablet_mode_controller()->EnableTabletModeWindowManager(true);
+    return tablet_mode_window_manager();
+  }
+
+  // Destroy the tablet mode window manager.
+  void DestroyTabletModeWindowManager() {
+    Shell::Get()->tablet_mode_controller()->EnableTabletModeWindowManager(
+        false);
+    EXPECT_FALSE(tablet_mode_window_manager());
+  }
+
+  // Get the maximze window manager.
+  TabletModeWindowManager* tablet_mode_window_manager() {
+    return Shell::Get()
+        ->tablet_mode_controller()
+        ->tablet_mode_window_manager_.get();
+  }
+
+  // Resize our desktop.
+  void ResizeDesktop(int width_delta) {
+    gfx::Size size =
+        display::Screen::GetScreen()
+            ->GetDisplayNearestWindow(Shell::GetPrimaryRootWindow())
+            .size();
+    size.Enlarge(0, width_delta);
+    UpdateDisplay(size.ToString());
+  }
+
+ private:
+  // Create a window in one of the containers which are watched by the
+  // TabletModeWindowManager. Note that this only works with one root window.
+  // If |can_maximize| is not set, |max_size| is the upper limiting size for
+  // the window, whereas an empty size means that there is no limit.
+  aura::Window* CreateWindowInWatchedContainer(aura::client::WindowType type,
+                                               const gfx::Rect& bounds,
+                                               const gfx::Size& max_size,
+                                               bool can_maximize,
+                                               bool can_resize) {
+    aura::test::TestWindowDelegate* delegate = NULL;
+    if (!can_maximize) {
+      delegate = aura::test::TestWindowDelegate::CreateSelfDestroyingDelegate();
+      delegate->set_window_component(HTCAPTION);
+      if (!max_size.IsEmpty())
+        delegate->set_maximum_size(max_size);
+    }
+    aura::Window* window = aura::test::CreateTestWindowWithDelegateAndType(
+        delegate, type, 0, bounds, NULL);
+    int32_t behavior = ui::mojom::kResizeBehaviorNone;
+    behavior |= can_resize ? ui::mojom::kResizeBehaviorCanResize : 0;
+    behavior |= can_maximize ? ui::mojom::kResizeBehaviorCanMaximize : 0;
+    window->SetProperty(aura::client::kResizeBehaviorKey, behavior);
+    aura::Window* container = Shell::GetContainer(
+        Shell::GetPrimaryRootWindow(), wm::kSwitchableWindowContainerIds[0]);
+    container->AddChild(window);
+    return window;
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(TabletModeWindowManagerTest);
+};
+
+// Test that creating the object and destroying it without any windows should
+// not cause any problems.
+TEST_F(TabletModeWindowManagerTest, SimpleStart) {
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(0, manager->GetNumberOfManagedWindows());
+  DestroyTabletModeWindowManager();
+}
+
+// Test that existing windows will handled properly when going into maximized
+// mode.
+TEST_F(TabletModeWindowManagerTest, PreCreateWindows) {
+  // Bounds for windows we know can be controlled.
+  gfx::Rect rect1(10, 10, 200, 50);
+  gfx::Rect rect2(10, 60, 200, 50);
+  gfx::Rect rect3(20, 140, 100, 100);
+  // Bounds for anything else.
+  gfx::Rect rect(80, 90, 100, 110);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect1));
+  std::unique_ptr<aura::Window> w2(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect2));
+  std::unique_ptr<aura::Window> w3(CreateFixedSizeNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect3));
+  std::unique_ptr<aura::Window> w4(
+      CreateWindow(aura::client::WINDOW_TYPE_PANEL, rect));
+  std::unique_ptr<aura::Window> w5(
+      CreateWindow(aura::client::WINDOW_TYPE_POPUP, rect));
+  std::unique_ptr<aura::Window> w6(
+      CreateWindow(aura::client::WINDOW_TYPE_CONTROL, rect));
+  std::unique_ptr<aura::Window> w7(
+      CreateWindow(aura::client::WINDOW_TYPE_MENU, rect));
+  std::unique_ptr<aura::Window> w8(
+      CreateWindow(aura::client::WINDOW_TYPE_TOOLTIP, rect));
+  EXPECT_FALSE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w3.get())->IsMaximized());
+  EXPECT_EQ(rect1.ToString(), w1->bounds().ToString());
+  EXPECT_EQ(rect2.ToString(), w2->bounds().ToString());
+  EXPECT_EQ(rect3.ToString(), w3->bounds().ToString());
+
+  // Create the manager and make sure that all qualifying windows were detected
+  // and changed.
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(3, manager->GetNumberOfManagedWindows());
+  EXPECT_TRUE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_TRUE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w3.get())->IsMaximized());
+  EXPECT_NE(rect3.origin().ToString(), w3->bounds().origin().ToString());
+  EXPECT_EQ(rect3.size().ToString(), w3->bounds().size().ToString());
+
+  // All other windows should not have been touched.
+  EXPECT_FALSE(wm::GetWindowState(w4.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w5.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w6.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w7.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w8.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), w4->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w5->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w6->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w7->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w8->bounds().ToString());
+
+  // Destroy the manager again and check that the windows return to their
+  // previous state.
+  DestroyTabletModeWindowManager();
+  EXPECT_FALSE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w3.get())->IsMaximized());
+  EXPECT_EQ(rect1.ToString(), w1->bounds().ToString());
+  EXPECT_EQ(rect2.ToString(), w2->bounds().ToString());
+  EXPECT_EQ(rect3.ToString(), w3->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w4->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w5->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w6->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w7->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w8->bounds().ToString());
+}
+
+// The same test as the above but while a system modal dialog is shown.
+TEST_F(TabletModeWindowManagerTest, GoingToMaximizedWithModalDialogPresent) {
+  // Bounds for windows we know can be controlled.
+  gfx::Rect rect1(10, 10, 200, 50);
+  gfx::Rect rect2(10, 60, 200, 50);
+  gfx::Rect rect3(20, 140, 100, 100);
+  // Bounds for anything else.
+  gfx::Rect rect(80, 90, 100, 110);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect1));
+  std::unique_ptr<aura::Window> w2(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect2));
+  std::unique_ptr<aura::Window> w3(CreateFixedSizeNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect3));
+  std::unique_ptr<aura::Window> w4(
+      CreateWindow(aura::client::WINDOW_TYPE_PANEL, rect));
+  std::unique_ptr<aura::Window> w5(
+      CreateWindow(aura::client::WINDOW_TYPE_POPUP, rect));
+  std::unique_ptr<aura::Window> w6(
+      CreateWindow(aura::client::WINDOW_TYPE_CONTROL, rect));
+  std::unique_ptr<aura::Window> w7(
+      CreateWindow(aura::client::WINDOW_TYPE_MENU, rect));
+  std::unique_ptr<aura::Window> w8(
+      CreateWindow(aura::client::WINDOW_TYPE_TOOLTIP, rect));
+  EXPECT_FALSE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w3.get())->IsMaximized());
+  EXPECT_EQ(rect1.ToString(), w1->bounds().ToString());
+  EXPECT_EQ(rect2.ToString(), w2->bounds().ToString());
+  EXPECT_EQ(rect3.ToString(), w3->bounds().ToString());
+
+  // Enable system modal dialog, and make sure both shelves are still hidden.
+  ShellPort::Get()->SimulateModalWindowOpenForTesting(true);
+  EXPECT_TRUE(ShellPort::Get()->IsSystemModalWindowOpen());
+
+  // Create the manager and make sure that all qualifying windows were detected
+  // and changed.
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(3, manager->GetNumberOfManagedWindows());
+  EXPECT_TRUE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_TRUE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w3.get())->IsMaximized());
+  EXPECT_NE(rect3.origin().ToString(), w3->bounds().origin().ToString());
+  EXPECT_EQ(rect3.size().ToString(), w3->bounds().size().ToString());
+
+  // All other windows should not have been touched.
+  EXPECT_FALSE(wm::GetWindowState(w4.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w5.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w6.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w7.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w8.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), w4->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w5->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w6->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w7->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w8->bounds().ToString());
+
+  // Destroy the manager again and check that the windows return to their
+  // previous state.
+  DestroyTabletModeWindowManager();
+  EXPECT_FALSE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w3.get())->IsMaximized());
+  EXPECT_EQ(rect1.ToString(), w1->bounds().ToString());
+  EXPECT_EQ(rect2.ToString(), w2->bounds().ToString());
+  EXPECT_EQ(rect3.ToString(), w3->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w4->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w5->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w6->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w7->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w8->bounds().ToString());
+}
+
+// Test that non-maximizable windows get properly handled when going into
+// tablet mode.
+TEST_F(TabletModeWindowManagerTest,
+       PreCreateNonMaximizableButResizableWindows) {
+  // The window bounds.
+  gfx::Rect rect(10, 10, 200, 50);
+  gfx::Size max_size(300, 200);
+  gfx::Size empty_size;
+  std::unique_ptr<aura::Window> unlimited_window(CreateNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect, empty_size));
+  std::unique_ptr<aura::Window> limited_window(CreateNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect, max_size));
+  std::unique_ptr<aura::Window> fixed_window(
+      CreateFixedSizeNonMaximizableWindow(aura::client::WINDOW_TYPE_NORMAL,
+                                          rect));
+  EXPECT_FALSE(wm::GetWindowState(unlimited_window.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), unlimited_window->bounds().ToString());
+  EXPECT_FALSE(wm::GetWindowState(limited_window.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), limited_window->bounds().ToString());
+  EXPECT_FALSE(wm::GetWindowState(fixed_window.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), fixed_window->bounds().ToString());
+
+  gfx::Size workspace_size =
+      ScreenUtil::GetMaximizedWindowBoundsInParent(unlimited_window.get())
+          .size();
+
+  // Create the manager and make sure that all qualifying windows were detected
+  // and changed.
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(3, manager->GetNumberOfManagedWindows());
+  // The unlimited window should have the size of the workspace / parent window.
+  EXPECT_FALSE(wm::GetWindowState(unlimited_window.get())->IsMaximized());
+  EXPECT_EQ("0,0", unlimited_window->bounds().origin().ToString());
+  EXPECT_EQ(workspace_size.ToString(),
+            unlimited_window->bounds().size().ToString());
+  // The limited window should have the size of the upper possible bounds.
+  EXPECT_FALSE(wm::GetWindowState(limited_window.get())->IsMaximized());
+  EXPECT_NE(rect.origin().ToString(),
+            limited_window->bounds().origin().ToString());
+  EXPECT_EQ(max_size.ToString(), limited_window->bounds().size().ToString());
+  // The fixed size window should have the size of the original window.
+  EXPECT_FALSE(wm::GetWindowState(fixed_window.get())->IsMaximized());
+  EXPECT_NE(rect.origin().ToString(),
+            fixed_window->bounds().origin().ToString());
+  EXPECT_EQ(rect.size().ToString(), fixed_window->bounds().size().ToString());
+
+  // Destroy the manager again and check that the windows return to their
+  // previous state.
+  DestroyTabletModeWindowManager();
+  EXPECT_FALSE(wm::GetWindowState(unlimited_window.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), unlimited_window->bounds().ToString());
+  EXPECT_FALSE(wm::GetWindowState(limited_window.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), limited_window->bounds().ToString());
+  EXPECT_FALSE(wm::GetWindowState(fixed_window.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), fixed_window->bounds().ToString());
+}
+
+// Test that creating windows while a maximizer exists picks them properly up.
+TEST_F(TabletModeWindowManagerTest, CreateWindows) {
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(0, manager->GetNumberOfManagedWindows());
+
+  // Create the windows and see that the window manager picks them up.
+  // Rects for windows we know can be controlled.
+  gfx::Rect rect1(10, 10, 200, 50);
+  gfx::Rect rect2(10, 60, 200, 50);
+  gfx::Rect rect3(20, 140, 100, 100);
+  // One rect for anything else.
+  gfx::Rect rect(80, 90, 100, 110);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect1));
+  std::unique_ptr<aura::Window> w2(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect2));
+  std::unique_ptr<aura::Window> w3(CreateFixedSizeNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect3));
+  std::unique_ptr<aura::Window> w4(
+      CreateWindow(aura::client::WINDOW_TYPE_PANEL, rect));
+  std::unique_ptr<aura::Window> w5(
+      CreateWindow(aura::client::WINDOW_TYPE_POPUP, rect));
+  std::unique_ptr<aura::Window> w6(
+      CreateWindow(aura::client::WINDOW_TYPE_CONTROL, rect));
+  std::unique_ptr<aura::Window> w7(
+      CreateWindow(aura::client::WINDOW_TYPE_MENU, rect));
+  std::unique_ptr<aura::Window> w8(
+      CreateWindow(aura::client::WINDOW_TYPE_TOOLTIP, rect));
+  EXPECT_TRUE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_TRUE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_EQ(3, manager->GetNumberOfManagedWindows());
+  EXPECT_FALSE(wm::GetWindowState(w3.get())->IsMaximized());
+
+  // Make sure that the position of the unresizable window is in the middle of
+  // the screen.
+  gfx::Size work_area_size =
+      ScreenUtil::GetDisplayWorkAreaBoundsInParent(w3.get()).size();
+  gfx::Point center =
+      gfx::Point((work_area_size.width() - rect3.size().width()) / 2,
+                 (work_area_size.height() - rect3.size().height()) / 2);
+  gfx::Rect centered_window_bounds = gfx::Rect(center, rect3.size());
+  EXPECT_EQ(centered_window_bounds.ToString(), w3->bounds().ToString());
+
+  // All other windows should not have been touched.
+  EXPECT_FALSE(wm::GetWindowState(w4.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w5.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w6.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w7.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w8.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), w4->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w5->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w6->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w7->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w8->bounds().ToString());
+
+  // After the tablet mode was disabled all windows fall back into the mode
+  // they were created for.
+  DestroyTabletModeWindowManager();
+  EXPECT_FALSE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w3.get())->IsMaximized());
+  EXPECT_EQ(rect1.ToString(), w1->bounds().ToString());
+  EXPECT_EQ(rect2.ToString(), w2->bounds().ToString());
+  EXPECT_EQ(rect3.ToString(), w3->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w4->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w5->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w6->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w7->bounds().ToString());
+  EXPECT_EQ(rect.ToString(), w8->bounds().ToString());
+}
+
+// Test that a window which got created while the tablet mode window manager
+// is active gets restored to a usable (non tiny) size upon switching back.
+TEST_F(TabletModeWindowManagerTest,
+       CreateWindowInMaximizedModeRestoresToUsefulSize) {
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(0, manager->GetNumberOfManagedWindows());
+
+  // We pass in an empty rectangle to simulate a window creation with no
+  // particular size.
+  gfx::Rect empty_rect(0, 0, 0, 0);
+  std::unique_ptr<aura::Window> window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, empty_rect));
+  EXPECT_TRUE(wm::GetWindowState(window.get())->IsMaximized());
+  EXPECT_NE(empty_rect.ToString(), window->bounds().ToString());
+  gfx::Rect maximized_size = window->bounds();
+
+  // Destroy the tablet mode and check that the resulting size of the window
+  // is remaining as it is (but not maximized).
+  DestroyTabletModeWindowManager();
+
+  EXPECT_FALSE(wm::GetWindowState(window.get())->IsMaximized());
+  EXPECT_EQ(maximized_size.ToString(), window->bounds().ToString());
+}
+
+// Test that non-maximizable windows get properly handled when created in
+// tablet mode.
+TEST_F(TabletModeWindowManagerTest, CreateNonMaximizableButResizableWindows) {
+  // Create the manager and make sure that all qualifying windows were detected
+  // and changed.
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+
+  gfx::Rect rect(10, 10, 200, 50);
+  gfx::Size max_size(300, 200);
+  gfx::Size empty_size;
+  std::unique_ptr<aura::Window> unlimited_window(CreateNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect, empty_size));
+  std::unique_ptr<aura::Window> limited_window(CreateNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect, max_size));
+  std::unique_ptr<aura::Window> fixed_window(
+      CreateFixedSizeNonMaximizableWindow(aura::client::WINDOW_TYPE_NORMAL,
+                                          rect));
+
+  gfx::Size workspace_size =
+      ScreenUtil::GetMaximizedWindowBoundsInParent(unlimited_window.get())
+          .size();
+
+  // All windows should be sized now as big as possible and be centered.
+  EXPECT_EQ(3, manager->GetNumberOfManagedWindows());
+  // The unlimited window should have the size of the workspace / parent window.
+  EXPECT_FALSE(wm::GetWindowState(unlimited_window.get())->IsMaximized());
+  EXPECT_EQ("0,0", unlimited_window->bounds().origin().ToString());
+  EXPECT_EQ(workspace_size.ToString(),
+            unlimited_window->bounds().size().ToString());
+  // The limited window should have the size of the upper possible bounds.
+  EXPECT_FALSE(wm::GetWindowState(limited_window.get())->IsMaximized());
+  EXPECT_NE(rect.origin().ToString(),
+            limited_window->bounds().origin().ToString());
+  EXPECT_EQ(max_size.ToString(), limited_window->bounds().size().ToString());
+  // The fixed size window should have the size of the original window.
+  EXPECT_FALSE(wm::GetWindowState(fixed_window.get())->IsMaximized());
+  EXPECT_NE(rect.origin().ToString(),
+            fixed_window->bounds().origin().ToString());
+  EXPECT_EQ(rect.size().ToString(), fixed_window->bounds().size().ToString());
+
+  // Destroy the manager again and check that the windows return to their
+  // creation state.
+  DestroyTabletModeWindowManager();
+
+  EXPECT_FALSE(wm::GetWindowState(unlimited_window.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), unlimited_window->bounds().ToString());
+  EXPECT_FALSE(wm::GetWindowState(limited_window.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), limited_window->bounds().ToString());
+  EXPECT_FALSE(wm::GetWindowState(fixed_window.get())->IsMaximized());
+  EXPECT_EQ(rect.ToString(), fixed_window->bounds().ToString());
+}
+
+// Create a string which consists of the bounds and the state for comparison.
+std::string GetPlacementString(const gfx::Rect& bounds,
+                               ui::WindowShowState state) {
+  return bounds.ToString() + base::StringPrintf(" %d", state);
+}
+
+// Retrieves the window's restore state override - if any - and returns it as a
+// string.
+std::string GetPlacementOverride(aura::Window* window) {
+  gfx::Rect* bounds = window->GetProperty(kRestoreBoundsOverrideKey);
+  if (bounds) {
+    gfx::Rect restore_bounds = *bounds;
+    ui::WindowShowState restore_state =
+        window->GetProperty(kRestoreShowStateOverrideKey);
+    return GetPlacementString(restore_bounds, restore_state);
+  }
+  return std::string();
+}
+
+// Test that the restore state will be kept at its original value for
+// session restauration purposes.
+TEST_F(TabletModeWindowManagerTest, TestRestoreIntegrety) {
+  gfx::Rect bounds(10, 10, 200, 50);
+  gfx::Size empty_size;
+  gfx::Rect empty_bounds;
+  std::unique_ptr<aura::Window> normal_window(CreateWindowWithWidget(bounds));
+  std::unique_ptr<aura::Window> maximized_window(
+      CreateWindowWithWidget(bounds));
+  wm::GetWindowState(maximized_window.get())->Maximize();
+
+  EXPECT_EQ(std::string(), GetPlacementOverride(normal_window.get()));
+  EXPECT_EQ(std::string(), GetPlacementOverride(maximized_window.get()));
+
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+
+  // With the maximization the override states should be returned in its
+  // pre-maximized state.
+  EXPECT_EQ(GetPlacementString(bounds, ui::SHOW_STATE_NORMAL),
+            GetPlacementOverride(normal_window.get()));
+  EXPECT_EQ(GetPlacementString(bounds, ui::SHOW_STATE_MAXIMIZED),
+            GetPlacementOverride(maximized_window.get()));
+
+  // Changing a window's state now does not change the returned result.
+  wm::GetWindowState(maximized_window.get())->Minimize();
+  EXPECT_EQ(GetPlacementString(bounds, ui::SHOW_STATE_MAXIMIZED),
+            GetPlacementOverride(maximized_window.get()));
+
+  // Destroy the manager again and check that the overrides get reset.
+  DestroyTabletModeWindowManager();
+  EXPECT_EQ(std::string(), GetPlacementOverride(normal_window.get()));
+  EXPECT_EQ(std::string(), GetPlacementOverride(maximized_window.get()));
+
+  // Changing a window's state now does not bring the overrides back.
+  wm::GetWindowState(maximized_window.get())->Restore();
+  gfx::Rect new_bounds(10, 10, 200, 50);
+  maximized_window->SetBounds(new_bounds);
+
+  EXPECT_EQ(std::string(), GetPlacementOverride(maximized_window.get()));
+}
+
+// Test that windows which got created before the maximizer was created can be
+// destroyed while the maximizer is still running.
+TEST_F(TabletModeWindowManagerTest, PreCreateWindowsDeleteWhileActive) {
+  TabletModeWindowManager* manager = NULL;
+  {
+    // Bounds for windows we know can be controlled.
+    gfx::Rect rect1(10, 10, 200, 50);
+    gfx::Rect rect2(10, 60, 200, 50);
+    gfx::Rect rect3(20, 140, 100, 100);
+    // Bounds for anything else.
+    gfx::Rect rect(80, 90, 100, 110);
+    std::unique_ptr<aura::Window> w1(
+        CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect1));
+    std::unique_ptr<aura::Window> w2(
+        CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect2));
+    std::unique_ptr<aura::Window> w3(CreateFixedSizeNonMaximizableWindow(
+        aura::client::WINDOW_TYPE_NORMAL, rect3));
+
+    // Create the manager and make sure that all qualifying windows were
+    // detected and changed.
+    manager = CreateTabletModeWindowManager();
+    ASSERT_TRUE(manager);
+    EXPECT_EQ(3, manager->GetNumberOfManagedWindows());
+  }
+  EXPECT_EQ(0, manager->GetNumberOfManagedWindows());
+  DestroyTabletModeWindowManager();
+}
+
+// Test that windows which got created while the maximizer was running can get
+// destroyed before the maximizer gets destroyed.
+TEST_F(TabletModeWindowManagerTest, CreateWindowsAndDeleteWhileActive) {
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(0, manager->GetNumberOfManagedWindows());
+  {
+    // Bounds for windows we know can be controlled.
+    gfx::Rect rect1(10, 10, 200, 50);
+    gfx::Rect rect2(10, 60, 200, 50);
+    gfx::Rect rect3(20, 140, 100, 100);
+    std::unique_ptr<aura::Window> w1(CreateWindow(
+        aura::client::WINDOW_TYPE_NORMAL, gfx::Rect(10, 10, 200, 50)));
+    std::unique_ptr<aura::Window> w2(CreateWindow(
+        aura::client::WINDOW_TYPE_NORMAL, gfx::Rect(10, 60, 200, 50)));
+    std::unique_ptr<aura::Window> w3(CreateFixedSizeNonMaximizableWindow(
+        aura::client::WINDOW_TYPE_NORMAL, gfx::Rect(20, 140, 100, 100)));
+    // Check that the windows got automatically maximized as well.
+    EXPECT_EQ(3, manager->GetNumberOfManagedWindows());
+    EXPECT_TRUE(wm::GetWindowState(w1.get())->IsMaximized());
+    EXPECT_TRUE(wm::GetWindowState(w2.get())->IsMaximized());
+    EXPECT_FALSE(wm::GetWindowState(w3.get())->IsMaximized());
+  }
+  EXPECT_EQ(0, manager->GetNumberOfManagedWindows());
+  DestroyTabletModeWindowManager();
+}
+
+// Test that windows which were maximized stay maximized.
+TEST_F(TabletModeWindowManagerTest, MaximizedShouldRemainMaximized) {
+  // Bounds for windows we know can be controlled.
+  gfx::Rect rect(10, 10, 200, 50);
+  std::unique_ptr<aura::Window> window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::GetWindowState(window.get())->Maximize();
+
+  // Create the manager and make sure that the window gets detected.
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(1, manager->GetNumberOfManagedWindows());
+  EXPECT_TRUE(wm::GetWindowState(window.get())->IsMaximized());
+
+  // Destroy the manager again and check that the window will remain maximized.
+  DestroyTabletModeWindowManager();
+  EXPECT_TRUE(wm::GetWindowState(window.get())->IsMaximized());
+  wm::GetWindowState(window.get())->Restore();
+  EXPECT_EQ(rect.ToString(), window->bounds().ToString());
+}
+
+// Test that minimized windows do neither get maximized nor restored upon
+// entering tablet mode and get restored to their previous state after
+// leaving.
+TEST_F(TabletModeWindowManagerTest, MinimizedWindowBehavior) {
+  // Bounds for windows we know can be controlled.
+  gfx::Rect rect(10, 10, 200, 50);
+  std::unique_ptr<aura::Window> initially_minimized_window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  std::unique_ptr<aura::Window> initially_normal_window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  std::unique_ptr<aura::Window> initially_maximized_window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::GetWindowState(initially_minimized_window.get())->Minimize();
+  wm::GetWindowState(initially_maximized_window.get())->Maximize();
+
+  // Create the manager and make sure that the window gets detected.
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(3, manager->GetNumberOfManagedWindows());
+  EXPECT_TRUE(
+      wm::GetWindowState(initially_minimized_window.get())->IsMinimized());
+  EXPECT_TRUE(wm::GetWindowState(initially_normal_window.get())->IsMaximized());
+  EXPECT_TRUE(
+      wm::GetWindowState(initially_maximized_window.get())->IsMaximized());
+  // Now minimize the second window to check that upon leaving the window
+  // will get restored to its minimized state.
+  wm::GetWindowState(initially_normal_window.get())->Minimize();
+  wm::GetWindowState(initially_maximized_window.get())->Minimize();
+  EXPECT_TRUE(
+      wm::GetWindowState(initially_minimized_window.get())->IsMinimized());
+  EXPECT_TRUE(wm::GetWindowState(initially_normal_window.get())->IsMinimized());
+  EXPECT_TRUE(
+      wm::GetWindowState(initially_maximized_window.get())->IsMinimized());
+
+  // Destroy the manager again and check that the window will get minimized.
+  DestroyTabletModeWindowManager();
+  EXPECT_TRUE(
+      wm::GetWindowState(initially_minimized_window.get())->IsMinimized());
+  EXPECT_FALSE(
+      wm::GetWindowState(initially_normal_window.get())->IsMinimized());
+  EXPECT_TRUE(
+      wm::GetWindowState(initially_maximized_window.get())->IsMaximized());
+}
+
+// Check that resizing the desktop does reposition unmaximizable, unresizable &
+// managed windows.
+TEST_F(TabletModeWindowManagerTest, DesktopSizeChangeMovesUnmaximizable) {
+  UpdateDisplay("400x400");
+  // This window will move because it does not fit the new bounds.
+  gfx::Rect rect(20, 300, 100, 100);
+  std::unique_ptr<aura::Window> window1(CreateFixedSizeNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect));
+  EXPECT_EQ(rect.ToString(), window1->bounds().ToString());
+
+  // This window will not move because it does fit the new bounds.
+  gfx::Rect rect2(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> window2(CreateFixedSizeNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect2));
+
+  // Turning on the manager will reposition (but not resize) the window.
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(2, manager->GetNumberOfManagedWindows());
+  gfx::Rect moved_bounds(window1->bounds());
+  EXPECT_NE(rect.origin().ToString(), moved_bounds.origin().ToString());
+  EXPECT_EQ(rect.size().ToString(), moved_bounds.size().ToString());
+
+  // Simulating a desktop resize should move the window again.
+  UpdateDisplay("300x300");
+  gfx::Rect new_moved_bounds(window1->bounds());
+  EXPECT_NE(rect.origin().ToString(), new_moved_bounds.origin().ToString());
+  EXPECT_EQ(rect.size().ToString(), new_moved_bounds.size().ToString());
+  EXPECT_NE(moved_bounds.origin().ToString(), new_moved_bounds.ToString());
+
+  // Turning off the mode should not restore to the initial coordinates since
+  // the new resolution is smaller and the window was on the edge.
+  DestroyTabletModeWindowManager();
+  EXPECT_NE(rect.ToString(), window1->bounds().ToString());
+  EXPECT_EQ(rect2.ToString(), window2->bounds().ToString());
+}
+
+// Check that windows return to original location if desktop size changes to
+// something else and back while in tablet mode.
+TEST_F(TabletModeWindowManagerTest, SizeChangeReturnWindowToOriginalPos) {
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> window(CreateFixedSizeNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect));
+
+  // Turning on the manager will reposition (but not resize) the window.
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(1, manager->GetNumberOfManagedWindows());
+  gfx::Rect moved_bounds(window->bounds());
+  EXPECT_NE(rect.origin().ToString(), moved_bounds.origin().ToString());
+  EXPECT_EQ(rect.size().ToString(), moved_bounds.size().ToString());
+
+  // Simulating a desktop resize should move the window again.
+  ResizeDesktop(-10);
+  gfx::Rect new_moved_bounds(window->bounds());
+  EXPECT_NE(rect.origin().ToString(), new_moved_bounds.origin().ToString());
+  EXPECT_EQ(rect.size().ToString(), new_moved_bounds.size().ToString());
+  EXPECT_NE(moved_bounds.origin().ToString(), new_moved_bounds.ToString());
+
+  // Then resize back to the original desktop size which should move windows
+  // to their original location after leaving the tablet mode.
+  ResizeDesktop(10);
+  DestroyTabletModeWindowManager();
+  EXPECT_EQ(rect.ToString(), window->bounds().ToString());
+}
+
+// Check that enabling of the tablet mode does not have an impact on the MRU
+// order of windows.
+TEST_F(TabletModeWindowManagerTest, ModeChangeKeepsMRUOrder) {
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(CreateFixedSizeNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect));
+  std::unique_ptr<aura::Window> w2(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  std::unique_ptr<aura::Window> w3(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  std::unique_ptr<aura::Window> w4(CreateFixedSizeNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect));
+  std::unique_ptr<aura::Window> w5(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+
+  // The windows should be in the reverse order of creation in the MRU list.
+  {
+    aura::Window::Windows windows =
+        Shell::Get()->mru_window_tracker()->BuildMruWindowList();
+
+    EXPECT_EQ(w1.get(), windows[4]);
+    EXPECT_EQ(w2.get(), windows[3]);
+    EXPECT_EQ(w3.get(), windows[2]);
+    EXPECT_EQ(w4.get(), windows[1]);
+    EXPECT_EQ(w5.get(), windows[0]);
+  }
+
+  // Activating the window manager should keep the order.
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(5, manager->GetNumberOfManagedWindows());
+  {
+    aura::Window::Windows windows =
+        Shell::Get()->mru_window_tracker()->BuildMruWindowList();
+    // We do not test maximization here again since that was done already.
+    EXPECT_EQ(w1.get(), windows[4]);
+    EXPECT_EQ(w2.get(), windows[3]);
+    EXPECT_EQ(w3.get(), windows[2]);
+    EXPECT_EQ(w4.get(), windows[1]);
+    EXPECT_EQ(w5.get(), windows[0]);
+  }
+
+  // Destroying should still keep the order.
+  DestroyTabletModeWindowManager();
+  {
+    aura::Window::Windows windows =
+        Shell::Get()->mru_window_tracker()->BuildMruWindowList();
+    // We do not test maximization here again since that was done already.
+    EXPECT_EQ(w1.get(), windows[4]);
+    EXPECT_EQ(w2.get(), windows[3]);
+    EXPECT_EQ(w3.get(), windows[2]);
+    EXPECT_EQ(w4.get(), windows[1]);
+    EXPECT_EQ(w5.get(), windows[0]);
+  }
+}
+
+// Check that a restore state change does always restore to maximized.
+TEST_F(TabletModeWindowManagerTest, IgnoreRestoreStateChages) {
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+  CreateTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsMaximized());
+  window_state->Minimize();
+  EXPECT_TRUE(window_state->IsMinimized());
+  window_state->Restore();
+  EXPECT_TRUE(window_state->IsMaximized());
+  window_state->Restore();
+  EXPECT_TRUE(window_state->IsMaximized());
+  DestroyTabletModeWindowManager();
+}
+
+// Check that minimize and restore do the right thing.
+TEST_F(TabletModeWindowManagerTest, TestMinimize) {
+  gfx::Rect rect(10, 10, 100, 100);
+  std::unique_ptr<aura::Window> window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(window.get());
+  EXPECT_EQ(rect.ToString(), window->bounds().ToString());
+  Shell::Get()->tablet_mode_controller()->EnableTabletModeWindowManager(true);
+  EXPECT_TRUE(window_state->IsMaximized());
+  EXPECT_FALSE(window_state->IsMinimized());
+  EXPECT_TRUE(window->IsVisible());
+
+  window_state->Minimize();
+  EXPECT_FALSE(window_state->IsMaximized());
+  EXPECT_TRUE(window_state->IsMinimized());
+  EXPECT_FALSE(window->IsVisible());
+
+  window_state->Maximize();
+  EXPECT_TRUE(window_state->IsMaximized());
+  EXPECT_FALSE(window_state->IsMinimized());
+  EXPECT_TRUE(window->IsVisible());
+
+  Shell::Get()->tablet_mode_controller()->EnableTabletModeWindowManager(false);
+  EXPECT_FALSE(window_state->IsMaximized());
+  EXPECT_FALSE(window_state->IsMinimized());
+  EXPECT_TRUE(window->IsVisible());
+}
+
+// Check that a full screen window remains full screen upon entering maximize
+// mode. Furthermore, checks that this window is not full screen upon exiting
+// tablet mode if it was un-full-screened while in tablet mode.
+TEST_F(TabletModeWindowManagerTest, KeepFullScreenModeOn) {
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+
+  Shelf* shelf = GetPrimaryShelf();
+
+  // Allow the shelf to hide.
+  shelf->SetAutoHideBehavior(SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS);
+  EXPECT_EQ(SHELF_AUTO_HIDE, shelf->GetVisibilityState());
+
+  wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  window_state->OnWMEvent(&event);
+
+  // With full screen, the shelf should get hidden.
+  EXPECT_TRUE(window_state->IsFullscreen());
+  EXPECT_EQ(SHELF_HIDDEN, shelf->GetVisibilityState());
+
+  CreateTabletModeWindowManager();
+
+  // The Full screen mode should continue to be on.
+  EXPECT_TRUE(window_state->IsFullscreen());
+  EXPECT_FALSE(window_state->IsMaximized());
+  EXPECT_EQ(SHELF_HIDDEN, shelf->GetVisibilityState());
+
+  // With leaving the fullscreen mode, the tablet mode should return and the
+  // shelf should maintain its state from before tablet mode.
+  window_state->OnWMEvent(&event);
+  EXPECT_FALSE(window_state->IsFullscreen());
+  EXPECT_TRUE(window_state->IsMaximized());
+  EXPECT_EQ(SHELF_AUTO_HIDE, shelf->GetVisibilityState());
+
+  // We left fullscreen mode while in tablet mode, so the window should
+  // remain maximized and the shelf should not change state upon exiting
+  // tablet mode.
+  DestroyTabletModeWindowManager();
+  EXPECT_FALSE(window_state->IsFullscreen());
+  EXPECT_TRUE(window_state->IsMaximized());
+  EXPECT_EQ(SHELF_AUTO_HIDE, shelf->GetVisibilityState());
+}
+
+// Similar to the fullscreen mode, the pinned mode should be kept as well.
+TEST_F(TabletModeWindowManagerTest, KeepPinnedModeOn_Case1) {
+  // Scenario: in the default state, pin a window, enter to the tablet mode,
+  // then unpin.
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Pin the window.
+  {
+    wm::WMEvent event(wm::WM_EVENT_PIN);
+    window_state->OnWMEvent(&event);
+  }
+  EXPECT_TRUE(window_state->IsPinned());
+
+  // Enter to Maximized mode.
+  // The pinned mode should continue to be on.
+  CreateTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsPinned());
+
+  // Then unpin.
+  window_state->Restore();
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Exit from Maximized mode.
+  // The window should not be back to the pinned mode.
+  DestroyTabletModeWindowManager();
+  EXPECT_FALSE(window_state->IsPinned());
+}
+
+TEST_F(TabletModeWindowManagerTest, KeepPinnedModeOn_Case2) {
+  // Scenario: in the tablet mode, pin a window, exit from the maximized
+  // mode, then unpin.
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Enter to Maximized mode.
+  CreateTabletModeWindowManager();
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Pin the window.
+  {
+    wm::WMEvent event(wm::WM_EVENT_PIN);
+    window_state->OnWMEvent(&event);
+  }
+  EXPECT_TRUE(window_state->IsPinned());
+
+  // Exit from Maximized mode.
+  // The pinned mode should continue to be on.
+  DestroyTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsPinned());
+
+  // Then unpin.
+  window_state->Restore();
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Enter again to Maximized mode for verification.
+  // The window should not be back to the pinned mode.
+  CreateTabletModeWindowManager();
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Exit from Maximized mode.
+  DestroyTabletModeWindowManager();
+  EXPECT_FALSE(window_state->IsPinned());
+}
+
+TEST_F(TabletModeWindowManagerTest, KeepPinnedModeOn_Case3) {
+  // Scenario: in the default state, pin a window, enter to the tablet mode,
+  // exit from the tablet mode, then unpin.
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Pin the window.
+  {
+    wm::WMEvent event(wm::WM_EVENT_PIN);
+    window_state->OnWMEvent(&event);
+  }
+  EXPECT_TRUE(window_state->IsPinned());
+
+  // Enter to Maximized mode.
+  // The pinned mode should continue to be on.
+  CreateTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsPinned());
+
+  // Exit from Maximized mode.
+  // The pinned mode should continue to be on, too.
+  DestroyTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsPinned());
+
+  // Then unpin.
+  window_state->Restore();
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Enter again to Maximized mode for verification.
+  // The window should not be back to the pinned mode.
+  CreateTabletModeWindowManager();
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Exit from Maximized mode.
+  DestroyTabletModeWindowManager();
+}
+
+TEST_F(TabletModeWindowManagerTest, KeepPinnedModeOn_Case4) {
+  // Scenario: in the tablet mode, pin a window, exit from the maximized
+  // mode, enter back to the tablet mode, then unpin.
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Enter to Maximized mode.
+  CreateTabletModeWindowManager();
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Pin the window.
+  {
+    wm::WMEvent event(wm::WM_EVENT_PIN);
+    window_state->OnWMEvent(&event);
+  }
+  EXPECT_TRUE(window_state->IsPinned());
+
+  // Exit from Maximized mode.
+  // The pinned mode should continue to be on.
+  DestroyTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsPinned());
+
+  // Enter again to Maximized mode.
+  // The pinned mode should continue to be on, too.
+  CreateTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsPinned());
+
+  // Then unpin.
+  window_state->Restore();
+  EXPECT_FALSE(window_state->IsPinned());
+
+  // Exit from Maximized mode.
+  // The window should not be back to the pinned mode.
+  DestroyTabletModeWindowManager();
+  EXPECT_FALSE(window_state->IsPinned());
+}
+
+// Verifies that if a window is un-full-screened while in tablet mode,
+// other changes to that window's state (such as minimizing it) are
+// preserved upon exiting tablet mode.
+TEST_F(TabletModeWindowManagerTest, MinimizePreservedAfterLeavingFullscreen) {
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+
+  Shelf* shelf = GetPrimaryShelf();
+
+  // Allow the shelf to hide and enter full screen.
+  shelf->SetAutoHideBehavior(SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS);
+  wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  window_state->OnWMEvent(&event);
+  ASSERT_FALSE(window_state->IsMinimized());
+
+  // Enter tablet mode, exit full screen, and then minimize the window.
+  CreateTabletModeWindowManager();
+  window_state->OnWMEvent(&event);
+  window_state->Minimize();
+  ASSERT_TRUE(window_state->IsMinimized());
+
+  // The window should remain minimized when exiting tablet mode.
+  DestroyTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsMinimized());
+}
+
+// Check that full screen mode can be turned on in tablet mode and remains
+// upon coming back.
+TEST_F(TabletModeWindowManagerTest, AllowFullScreenMode) {
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+
+  Shelf* shelf = GetPrimaryShelf();
+
+  // Allow the shelf to hide.
+  shelf->SetAutoHideBehavior(SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS);
+
+  EXPECT_FALSE(window_state->IsFullscreen());
+  EXPECT_FALSE(window_state->IsMaximized());
+  EXPECT_EQ(SHELF_AUTO_HIDE, shelf->GetVisibilityState());
+
+  CreateTabletModeWindowManager();
+
+  // Fullscreen mode should still be off and the shelf should maintain its
+  // state.
+  EXPECT_FALSE(window_state->IsFullscreen());
+  EXPECT_TRUE(window_state->IsMaximized());
+  EXPECT_EQ(SHELF_AUTO_HIDE, shelf->GetVisibilityState());
+
+  // After going into fullscreen mode, the shelf should be hidden.
+  wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  window_state->OnWMEvent(&event);
+  EXPECT_TRUE(window_state->IsFullscreen());
+  EXPECT_FALSE(window_state->IsMaximized());
+  EXPECT_EQ(SHELF_HIDDEN, shelf->GetVisibilityState());
+
+  // With the destruction of the manager we should remain in full screen.
+  DestroyTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsFullscreen());
+  EXPECT_FALSE(window_state->IsMaximized());
+  EXPECT_EQ(SHELF_HIDDEN, shelf->GetVisibilityState());
+}
+
+// Check that the full screen mode will stay active when the tablet mode is
+// ended.
+TEST_F(TabletModeWindowManagerTest,
+       FullScreenModeRemainsWhenCreatedInMaximizedMode) {
+  CreateTabletModeWindowManager();
+
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+  wm::WMEvent event_full_screen(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  window_state->OnWMEvent(&event_full_screen);
+  EXPECT_TRUE(window_state->IsFullscreen());
+
+  // After the tablet mode manager is ended, full screen will remain.
+  DestroyTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsFullscreen());
+}
+
+// Check that the full screen mode will stay active throughout a maximzied mode
+// session.
+TEST_F(TabletModeWindowManagerTest,
+       FullScreenModeRemainsThroughTabletModeSwitch) {
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+  wm::WMEvent event_full_screen(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  window_state->OnWMEvent(&event_full_screen);
+  EXPECT_TRUE(window_state->IsFullscreen());
+
+  CreateTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsFullscreen());
+  DestroyTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsFullscreen());
+}
+
+// Check that an empty window does not get restored to a tiny size.
+TEST_F(TabletModeWindowManagerTest,
+       CreateAndMaximizeInTabletModeShouldRetoreToGoodSizeGoingToDefault) {
+  CreateTabletModeWindowManager();
+  gfx::Rect rect;
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  w1->Show();
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+  EXPECT_TRUE(window_state->IsMaximized());
+
+  // There is a calling order in which the restore bounds can get set to an
+  // empty rectangle. We simulate this here.
+  window_state->SetRestoreBoundsInScreen(rect);
+  EXPECT_TRUE(window_state->GetRestoreBoundsInScreen().IsEmpty());
+
+  // Setting the window to a new size will physically not change the window,
+  // but the restore size should get updated so that a restore later on will
+  // return to this size.
+  gfx::Rect requested_bounds(10, 20, 50, 70);
+  w1->SetBounds(requested_bounds);
+  EXPECT_TRUE(window_state->IsMaximized());
+  EXPECT_EQ(requested_bounds.ToString(),
+            window_state->GetRestoreBoundsInScreen().ToString());
+
+  DestroyTabletModeWindowManager();
+
+  EXPECT_FALSE(window_state->IsMaximized());
+  EXPECT_EQ(w1->bounds().ToString(), requested_bounds.ToString());
+}
+
+// Check that snapping operations get ignored.
+TEST_F(TabletModeWindowManagerTest, SnapModeTests) {
+  gfx::Rect rect(20, 140, 100, 100);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* window_state = wm::GetWindowState(w1.get());
+  wm::WMEvent event_left(wm::WM_EVENT_SNAP_LEFT);
+  wm::WMEvent event_right(wm::WM_EVENT_SNAP_RIGHT);
+  window_state->OnWMEvent(&event_left);
+  EXPECT_TRUE(window_state->IsSnapped());
+
+  CreateTabletModeWindowManager();
+
+  // Fullscreen mode should now be off and it should not come back while in
+  // tablet mode.
+  EXPECT_FALSE(window_state->IsSnapped());
+  EXPECT_TRUE(window_state->IsMaximized());
+  window_state->OnWMEvent(&event_left);
+  EXPECT_FALSE(window_state->IsSnapped());
+  EXPECT_TRUE(window_state->IsMaximized());
+  window_state->OnWMEvent(&event_right);
+  EXPECT_FALSE(window_state->IsSnapped());
+  EXPECT_TRUE(window_state->IsMaximized());
+
+  DestroyTabletModeWindowManager();
+  EXPECT_TRUE(window_state->IsSnapped());
+}
+
+// Check that non maximizable windows cannot be dragged by the user.
+TEST_F(TabletModeWindowManagerTest, TryToDesktopSizeDragUnmaximizable) {
+  gfx::Rect rect(10, 10, 100, 100);
+  std::unique_ptr<aura::Window> window(CreateFixedSizeNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect));
+  EXPECT_EQ(rect.ToString(), window->bounds().ToString());
+
+  // 1. Move the mouse over the caption and check that dragging the window does
+  // change the location.
+  ui::test::EventGenerator generator(Shell::GetPrimaryRootWindow());
+  generator.MoveMouseTo(gfx::Point(rect.x() + 2, rect.y() + 2));
+  generator.PressLeftButton();
+  generator.MoveMouseBy(10, 5);
+  RunAllPendingInMessageLoop();
+  generator.ReleaseLeftButton();
+  gfx::Point first_dragged_origin = window->bounds().origin();
+  EXPECT_EQ(rect.x() + 10, first_dragged_origin.x());
+  EXPECT_EQ(rect.y() + 5, first_dragged_origin.y());
+
+  // 2. Check that turning on the manager will stop allowing the window from
+  // dragging.
+  Shell::Get()->tablet_mode_controller()->EnableTabletModeWindowManager(true);
+  gfx::Rect center_bounds(window->bounds());
+  EXPECT_NE(rect.origin().ToString(), center_bounds.origin().ToString());
+  generator.MoveMouseTo(
+      gfx::Point(center_bounds.x() + 1, center_bounds.y() + 1));
+  generator.PressLeftButton();
+  generator.MoveMouseBy(10, 5);
+  RunAllPendingInMessageLoop();
+  generator.ReleaseLeftButton();
+  EXPECT_EQ(center_bounds.x(), window->bounds().x());
+  EXPECT_EQ(center_bounds.y(), window->bounds().y());
+  Shell::Get()->tablet_mode_controller()->EnableTabletModeWindowManager(false);
+
+  // 3. Releasing the mazimize manager again will restore the window to its
+  // previous bounds and
+  generator.MoveMouseTo(
+      gfx::Point(first_dragged_origin.x() + 1, first_dragged_origin.y() + 1));
+  generator.PressLeftButton();
+  generator.MoveMouseBy(10, 5);
+  RunAllPendingInMessageLoop();
+  generator.ReleaseLeftButton();
+  EXPECT_EQ(first_dragged_origin.x() + 10, window->bounds().x());
+  EXPECT_EQ(first_dragged_origin.y() + 5, window->bounds().y());
+}
+
+// Test that overview is exited before entering / exiting tablet mode so that
+// the window changes made by TabletModeWindowManager do not conflict with
+// those made in WindowOverview.
+TEST_F(TabletModeWindowManagerTest, ExitsOverview) {
+  // Bounds for windows we know can be controlled.
+  gfx::Rect rect1(10, 10, 200, 50);
+  gfx::Rect rect2(10, 60, 200, 50);
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect1));
+  std::unique_ptr<aura::Window> w2(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect2));
+
+  WindowSelectorController* window_selector_controller =
+      Shell::Get()->window_selector_controller();
+  ASSERT_TRUE(window_selector_controller->ToggleOverview());
+  ASSERT_TRUE(window_selector_controller->IsSelecting());
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_FALSE(window_selector_controller->IsSelecting());
+
+  ASSERT_TRUE(window_selector_controller->ToggleOverview());
+  ASSERT_TRUE(window_selector_controller->IsSelecting());
+  // Destroy the manager again and check that the windows return to their
+  // previous state.
+  DestroyTabletModeWindowManager();
+  EXPECT_FALSE(window_selector_controller->IsSelecting());
+}
+
+// Test that an edge swipe from the top will end full screen mode.
+TEST_F(TabletModeWindowManagerTest, ExitFullScreenWithEdgeSwipeFromTop) {
+  // TODO: investigate failure. http://crbug.com/698093.
+  if (Shell::GetAshConfig() == Config::MASH)
+    return;
+
+  gfx::Rect rect(10, 10, 200, 50);
+  std::unique_ptr<aura::Window> background_window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  std::unique_ptr<aura::Window> foreground_window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* background_window_state =
+      wm::GetWindowState(background_window.get());
+  wm::WindowState* foreground_window_state =
+      wm::GetWindowState(foreground_window.get());
+  wm::ActivateWindow(foreground_window.get());
+  CreateTabletModeWindowManager();
+
+  // Fullscreen both windows.
+  wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  background_window_state->OnWMEvent(&event);
+  foreground_window_state->OnWMEvent(&event);
+  EXPECT_TRUE(background_window_state->IsFullscreen());
+  EXPECT_TRUE(foreground_window_state->IsFullscreen());
+  EXPECT_EQ(foreground_window.get(), wm::GetActiveWindow());
+
+  // Do an edge swipe top into screen.
+  ui::test::EventGenerator generator(Shell::GetPrimaryRootWindow());
+  generator.GestureScrollSequence(gfx::Point(50, 0), gfx::Point(50, 100),
+                                  base::TimeDelta::FromMilliseconds(20), 10);
+
+  EXPECT_FALSE(foreground_window_state->IsFullscreen());
+  EXPECT_TRUE(background_window_state->IsFullscreen());
+
+  // Do a second edge swipe top into screen.
+  generator.GestureScrollSequence(gfx::Point(50, 0), gfx::Point(50, 100),
+                                  base::TimeDelta::FromMilliseconds(20), 10);
+
+  EXPECT_FALSE(foreground_window_state->IsFullscreen());
+  EXPECT_TRUE(background_window_state->IsFullscreen());
+
+  DestroyTabletModeWindowManager();
+}
+
+// Test that an edge swipe from the bottom will end full screen mode.
+TEST_F(TabletModeWindowManagerTest, ExitFullScreenWithEdgeSwipeFromBottom) {
+  // TODO: investigate failure. http://crbug.com/698093.
+  if (Shell::GetAshConfig() == Config::MASH)
+    return;
+
+  gfx::Rect rect(10, 10, 200, 50);
+  std::unique_ptr<aura::Window> background_window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  std::unique_ptr<aura::Window> foreground_window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* background_window_state =
+      wm::GetWindowState(background_window.get());
+  wm::WindowState* foreground_window_state =
+      wm::GetWindowState(foreground_window.get());
+  wm::ActivateWindow(foreground_window.get());
+  CreateTabletModeWindowManager();
+
+  // Fullscreen both windows.
+  wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  background_window_state->OnWMEvent(&event);
+  foreground_window_state->OnWMEvent(&event);
+  EXPECT_TRUE(background_window_state->IsFullscreen());
+  EXPECT_TRUE(foreground_window_state->IsFullscreen());
+  EXPECT_EQ(foreground_window.get(), wm::GetActiveWindow());
+
+  // Do an edge swipe bottom into screen.
+  ui::test::EventGenerator generator(Shell::GetPrimaryRootWindow());
+  int y = Shell::GetPrimaryRootWindow()->bounds().bottom();
+  generator.GestureScrollSequence(gfx::Point(50, y), gfx::Point(50, y - 100),
+                                  base::TimeDelta::FromMilliseconds(20), 10);
+
+  EXPECT_FALSE(foreground_window_state->IsFullscreen());
+  EXPECT_TRUE(background_window_state->IsFullscreen());
+
+  DestroyTabletModeWindowManager();
+}
+
+// Test that an edge touch press at the top will end full screen mode.
+TEST_F(TabletModeWindowManagerTest, ExitFullScreenWithEdgeTouchAtTop) {
+  // TODO: investigate failure. http://crbug.com/698093.
+  if (Shell::GetAshConfig() == Config::MASH)
+    return;
+
+  gfx::Rect rect(10, 10, 200, 50);
+  std::unique_ptr<aura::Window> background_window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  std::unique_ptr<aura::Window> foreground_window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* background_window_state =
+      wm::GetWindowState(background_window.get());
+  wm::WindowState* foreground_window_state =
+      wm::GetWindowState(foreground_window.get());
+  wm::ActivateWindow(foreground_window.get());
+  CreateTabletModeWindowManager();
+
+  // Fullscreen both windows.
+  wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  background_window_state->OnWMEvent(&event);
+  foreground_window_state->OnWMEvent(&event);
+  EXPECT_TRUE(background_window_state->IsFullscreen());
+  EXPECT_TRUE(foreground_window_state->IsFullscreen());
+  EXPECT_EQ(foreground_window.get(), wm::GetActiveWindow());
+
+  // Touch tap on the top edge.
+  ui::test::EventGenerator generator(Shell::GetPrimaryRootWindow());
+  generator.GestureTapAt(gfx::Point(100, 0));
+  EXPECT_FALSE(foreground_window_state->IsFullscreen());
+  EXPECT_TRUE(background_window_state->IsFullscreen());
+
+  // Try the same again and see that nothing changes.
+  generator.GestureTapAt(gfx::Point(100, 0));
+  EXPECT_FALSE(foreground_window_state->IsFullscreen());
+  EXPECT_TRUE(background_window_state->IsFullscreen());
+
+  DestroyTabletModeWindowManager();
+}
+
+// Test that an edge touch press at the bottom will end full screen mode.
+TEST_F(TabletModeWindowManagerTest, ExitFullScreenWithEdgeTouchAtBottom) {
+  // TODO: investigate failure. http://crbug.com/698093.
+  if (Shell::GetAshConfig() == Config::MASH)
+    return;
+
+  gfx::Rect rect(10, 10, 200, 50);
+  std::unique_ptr<aura::Window> background_window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  std::unique_ptr<aura::Window> foreground_window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+  wm::WindowState* background_window_state =
+      wm::GetWindowState(background_window.get());
+  wm::WindowState* foreground_window_state =
+      wm::GetWindowState(foreground_window.get());
+  wm::ActivateWindow(foreground_window.get());
+  CreateTabletModeWindowManager();
+
+  // Fullscreen both windows.
+  wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  background_window_state->OnWMEvent(&event);
+  foreground_window_state->OnWMEvent(&event);
+  EXPECT_TRUE(background_window_state->IsFullscreen());
+  EXPECT_TRUE(foreground_window_state->IsFullscreen());
+  EXPECT_EQ(foreground_window.get(), wm::GetActiveWindow());
+
+  // Touch tap on the bottom edge.
+  ui::test::EventGenerator generator(Shell::GetPrimaryRootWindow());
+  generator.GestureTapAt(
+      gfx::Point(100, Shell::GetPrimaryRootWindow()->bounds().bottom() - 1));
+  EXPECT_FALSE(foreground_window_state->IsFullscreen());
+  EXPECT_TRUE(background_window_state->IsFullscreen());
+
+  // Try the same again and see that nothing changes.
+  generator.GestureTapAt(
+      gfx::Point(100, Shell::GetPrimaryRootWindow()->bounds().bottom() - 1));
+  EXPECT_FALSE(foreground_window_state->IsFullscreen());
+  EXPECT_TRUE(background_window_state->IsFullscreen());
+
+  DestroyTabletModeWindowManager();
+}
+
+// Test that an edge swipe from the top on an immersive mode window will not end
+// full screen mode.
+TEST_F(TabletModeWindowManagerTest, NoExitImmersiveModeWithEdgeSwipeFromTop) {
+  std::unique_ptr<aura::Window> window(CreateWindow(
+      aura::client::WINDOW_TYPE_NORMAL, gfx::Rect(10, 10, 200, 50)));
+  wm::WindowState* window_state = wm::GetWindowState(window.get());
+  wm::ActivateWindow(window.get());
+  CreateTabletModeWindowManager();
+
+  // Fullscreen the window.
+  wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  window_state->OnWMEvent(&event);
+  EXPECT_TRUE(window_state->IsFullscreen());
+  EXPECT_FALSE(window_state->in_immersive_fullscreen());
+  EXPECT_EQ(window.get(), wm::GetActiveWindow());
+
+  window_state->set_in_immersive_fullscreen(true);
+
+  // Do an edge swipe top into screen.
+  ui::test::EventGenerator generator(Shell::GetPrimaryRootWindow());
+  generator.GestureScrollSequence(gfx::Point(50, 0), gfx::Point(50, 100),
+                                  base::TimeDelta::FromMilliseconds(20), 10);
+
+  // It should have not exited full screen or immersive mode.
+  EXPECT_TRUE(window_state->IsFullscreen());
+  EXPECT_TRUE(window_state->in_immersive_fullscreen());
+
+  DestroyTabletModeWindowManager();
+}
+
+// Test that an edge swipe from the bottom will not end immersive mode.
+TEST_F(TabletModeWindowManagerTest,
+       NoExitImmersiveModeWithEdgeSwipeFromBottom) {
+  std::unique_ptr<aura::Window> window(CreateWindow(
+      aura::client::WINDOW_TYPE_NORMAL, gfx::Rect(10, 10, 200, 50)));
+  wm::WindowState* window_state = wm::GetWindowState(window.get());
+  wm::ActivateWindow(window.get());
+  CreateTabletModeWindowManager();
+
+  // Fullscreen the window.
+  wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  window_state->OnWMEvent(&event);
+  EXPECT_TRUE(window_state->IsFullscreen());
+  EXPECT_FALSE(window_state->in_immersive_fullscreen());
+  EXPECT_EQ(window.get(), wm::GetActiveWindow());
+  window_state->set_in_immersive_fullscreen(true);
+  EXPECT_TRUE(window_state->in_immersive_fullscreen());
+
+  // Do an edge swipe bottom into screen.
+  ui::test::EventGenerator generator(Shell::GetPrimaryRootWindow());
+  int y = Shell::GetPrimaryRootWindow()->bounds().bottom();
+  generator.GestureScrollSequence(gfx::Point(50, y), gfx::Point(50, y - 100),
+                                  base::TimeDelta::FromMilliseconds(20), 10);
+
+  // The window should still be full screen and immersive.
+  EXPECT_TRUE(window_state->IsFullscreen());
+  EXPECT_TRUE(window_state->in_immersive_fullscreen());
+
+  DestroyTabletModeWindowManager();
+}
+
+// Tests that windows with the always-on-top property are not managed by
+// the TabletModeWindowManager while tablet mode is engaged (i.e.,
+// they remain free-floating).
+TEST_F(TabletModeWindowManagerTest, AlwaysOnTopWindows) {
+  gfx::Rect rect1(10, 10, 200, 50);
+  gfx::Rect rect2(20, 140, 100, 100);
+
+  // Create two windows with the always-on-top property.
+  std::unique_ptr<aura::Window> w1(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect1));
+  std::unique_ptr<aura::Window> w2(CreateFixedSizeNonMaximizableWindow(
+      aura::client::WINDOW_TYPE_NORMAL, rect2));
+  w1->SetProperty(aura::client::kAlwaysOnTopKey, true);
+  w2->SetProperty(aura::client::kAlwaysOnTopKey, true);
+  EXPECT_FALSE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_EQ(rect1.ToString(), w1->bounds().ToString());
+  EXPECT_EQ(rect2.ToString(), w2->bounds().ToString());
+  EXPECT_TRUE(wm::GetWindowState(w1.get())->can_be_dragged());
+  EXPECT_TRUE(wm::GetWindowState(w2.get())->can_be_dragged());
+
+  // Enter tablet mode. Neither window should be managed because they have
+  // the always-on-top property set, which means that none of their properties
+  // should change.
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  ASSERT_TRUE(manager);
+  EXPECT_EQ(0, manager->GetNumberOfManagedWindows());
+  EXPECT_FALSE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_EQ(rect1.ToString(), w1->bounds().ToString());
+  EXPECT_EQ(rect2.ToString(), w2->bounds().ToString());
+  EXPECT_TRUE(wm::GetWindowState(w1.get())->can_be_dragged());
+  EXPECT_TRUE(wm::GetWindowState(w2.get())->can_be_dragged());
+
+  // Remove the always-on-top property from both windows while in maximize
+  // mode. The windows should become managed, which means they should be
+  // maximized/centered and no longer be draggable.
+  w1->SetProperty(aura::client::kAlwaysOnTopKey, false);
+  w2->SetProperty(aura::client::kAlwaysOnTopKey, false);
+  EXPECT_EQ(2, manager->GetNumberOfManagedWindows());
+  EXPECT_TRUE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_NE(rect1.origin().ToString(), w1->bounds().origin().ToString());
+  EXPECT_NE(rect1.size().ToString(), w1->bounds().size().ToString());
+  EXPECT_NE(rect2.origin().ToString(), w2->bounds().origin().ToString());
+  EXPECT_EQ(rect2.size().ToString(), w2->bounds().size().ToString());
+  EXPECT_FALSE(wm::GetWindowState(w1.get())->can_be_dragged());
+  EXPECT_FALSE(wm::GetWindowState(w2.get())->can_be_dragged());
+
+  // Applying the always-on-top property to both windows while in maximize
+  // mode should cause both windows to return to their original size,
+  // position, and state.
+  w1->SetProperty(aura::client::kAlwaysOnTopKey, true);
+  w2->SetProperty(aura::client::kAlwaysOnTopKey, true);
+  EXPECT_EQ(0, manager->GetNumberOfManagedWindows());
+  EXPECT_FALSE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_EQ(rect1.ToString(), w1->bounds().ToString());
+  EXPECT_EQ(rect2.ToString(), w2->bounds().ToString());
+  EXPECT_TRUE(wm::GetWindowState(w1.get())->can_be_dragged());
+  EXPECT_TRUE(wm::GetWindowState(w2.get())->can_be_dragged());
+
+  // The always-on-top windows should not change when leaving tablet mode.
+  DestroyTabletModeWindowManager();
+  EXPECT_FALSE(wm::GetWindowState(w1.get())->IsMaximized());
+  EXPECT_FALSE(wm::GetWindowState(w2.get())->IsMaximized());
+  EXPECT_EQ(rect1.ToString(), w1->bounds().ToString());
+  EXPECT_EQ(rect2.ToString(), w2->bounds().ToString());
+  EXPECT_TRUE(wm::GetWindowState(w1.get())->can_be_dragged());
+  EXPECT_TRUE(wm::GetWindowState(w2.get())->can_be_dragged());
+}
+
+// Tests that windows that can control maximized bounds are not maximized
+// and not tracked.
+TEST_F(TabletModeWindowManagerTest, DontMaximizeClientManagedWindows) {
+  gfx::Rect rect(10, 10, 200, 50);
+  std::unique_ptr<aura::Window> window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+
+  wm::GetWindowState(window.get())->set_allow_set_bounds_direct(true);
+
+  TabletModeWindowManager* manager = CreateTabletModeWindowManager();
+  EXPECT_FALSE(wm::GetWindowState(window.get())->IsMaximized());
+  EXPECT_EQ(0, manager->GetNumberOfManagedWindows());
+}
+
+namespace {
+
+class TestObserver : public wm::WindowStateObserver {
+ public:
+  TestObserver(){};
+  ~TestObserver() override{};
+
+  // wm::WindowStateObserver:
+  void OnPreWindowStateTypeChange(wm::WindowState* window_state,
+                                  wm::WindowStateType old_type) override {
+    pre_count_++;
+    last_old_state_ = old_type;
+  }
+
+  void OnPostWindowStateTypeChange(wm::WindowState* window_state,
+                                   wm::WindowStateType old_type) override {
+    post_count_++;
+    EXPECT_EQ(last_old_state_, old_type);
+  }
+
+  int GetPreCountAndReset() {
+    int r = pre_count_;
+    pre_count_ = 0;
+    return r;
+  }
+
+  int GetPostCountAndReset() {
+    int r = post_count_;
+    post_count_ = 0;
+    return r;
+  }
+
+  wm::WindowStateType GetLastOldStateAndReset() {
+    wm::WindowStateType r = last_old_state_;
+    last_old_state_ = wm::WINDOW_STATE_TYPE_DEFAULT;
+    return r;
+  }
+
+ private:
+  int pre_count_ = 0;
+  int post_count_ = 0;
+  wm::WindowStateType last_old_state_ = wm::WINDOW_STATE_TYPE_DEFAULT;
+
+  DISALLOW_COPY_AND_ASSIGN(TestObserver);
+};
+
+}  // namespace
+
+TEST_F(TabletModeWindowManagerTest, StateTyepChange) {
+  TestObserver observer;
+  gfx::Rect rect(10, 10, 200, 50);
+  std::unique_ptr<aura::Window> window(
+      CreateWindow(aura::client::WINDOW_TYPE_NORMAL, rect));
+
+  CreateTabletModeWindowManager();
+
+  wm::WindowState* window_state = wm::GetWindowState(window.get());
+  window_state->AddObserver(&observer);
+
+  window->Show();
+  EXPECT_TRUE(window_state->IsMaximized());
+  EXPECT_EQ(0, observer.GetPreCountAndReset());
+  EXPECT_EQ(0, observer.GetPostCountAndReset());
+
+  // Window is already in tablet mode.
+  wm::WMEvent maximize_event(wm::WM_EVENT_MAXIMIZE);
+  window_state->OnWMEvent(&maximize_event);
+  EXPECT_EQ(0, observer.GetPreCountAndReset());
+  EXPECT_EQ(0, observer.GetPostCountAndReset());
+
+  wm::WMEvent fullscreen_event(wm::WM_EVENT_FULLSCREEN);
+  window_state->OnWMEvent(&fullscreen_event);
+  EXPECT_EQ(1, observer.GetPreCountAndReset());
+  EXPECT_EQ(1, observer.GetPostCountAndReset());
+  EXPECT_EQ(wm::WINDOW_STATE_TYPE_MAXIMIZED,
+            observer.GetLastOldStateAndReset());
+
+  window_state->OnWMEvent(&maximize_event);
+  EXPECT_EQ(1, observer.GetPreCountAndReset());
+  EXPECT_EQ(1, observer.GetPostCountAndReset());
+  EXPECT_EQ(wm::WINDOW_STATE_TYPE_FULLSCREEN,
+            observer.GetLastOldStateAndReset());
+
+  wm::WMEvent minimize_event(wm::WM_EVENT_MINIMIZE);
+  window_state->OnWMEvent(&minimize_event);
+  EXPECT_EQ(1, observer.GetPreCountAndReset());
+  EXPECT_EQ(1, observer.GetPostCountAndReset());
+  EXPECT_EQ(wm::WINDOW_STATE_TYPE_MAXIMIZED,
+            observer.GetLastOldStateAndReset());
+
+  wm::WMEvent restore_event(wm::WM_EVENT_NORMAL);
+  window_state->OnWMEvent(&restore_event);
+  EXPECT_EQ(1, observer.GetPreCountAndReset());
+  EXPECT_EQ(1, observer.GetPostCountAndReset());
+  EXPECT_EQ(wm::WINDOW_STATE_TYPE_MINIMIZED,
+            observer.GetLastOldStateAndReset());
+
+  window_state->RemoveObserver(&observer);
+
+  DestroyTabletModeWindowManager();
+}
+
+}  // namespace ash