Support modal windows

* New ContainerParams
 -  default_parent to specify the default parent when no
    transient parent is specified.
 - modal_container_priority now controls the modal container
   used for a modal window created for the given container.
 - if not specified, it will fallback downwards to find one.
 - if window is specified as always_on_top, it will use top
   most modal container.

* Changed network selector/shutdown dialog to use the new API.

* Other change:
 Separated test windows to athena/test/base/test_windows.h

BUG=410499
TBR=sky@chromium.org,reed@chromium.org
TEST=coverd by unit tests

Committed: https://crrev.com/4903fd36b2b36f00efeb1b7bba81b7de6e9457a3
Cr-Commit-Position: refs/heads/master@{#300192}

Review URL: https://codereview.chromium.org/662763002

Cr-Commit-Position: refs/heads/master@{#300288}

9 files changed, 724 insertions, 225 deletions

diff --git a/athena/screen/DEPS b/athena/screen/DEPS
index 1809145..423ee38 100644
--- a/athena/screen/DEPS
+++ b/athena/screen/DEPS
@@ -5,4 +5,7 @@ include_rules = [
   "+ui/events",
   "+ui/gfx",
   "+ui/wm",
+  "+third_party/skia/include",
+  # for tests.
+  "+athena/athena_export.h",
 ]
diff --git a/athena/screen/modal_window_controller.cc b/athena/screen/modal_window_controller.cc
new file mode 100644
index 0000000..71a19ff
--- /dev/null
+++ b/athena/screen/modal_window_controller.cc
@@ -0,0 +1,146 @@
+// 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 "athena/screen/modal_window_controller.h"
+
+#include "athena/screen/public/screen_manager.h"
+#include "base/message_loop/message_loop.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_property.h"
+#include "ui/compositor/layer.h"
+#include "ui/compositor/layer_animation_observer.h"
+#include "ui/compositor/scoped_layer_animation_settings.h"
+#include "ui/wm/core/window_animations.h"
+
+namespace athena {
+namespace {
+
+DEFINE_OWNED_WINDOW_PROPERTY_KEY(ModalWindowController,
+                                 kModalWindowControllerKey,
+                                 NULL);
+
+}  // namespace
+
+// static
+ModalWindowController* ModalWindowController::Get(aura::Window* container) {
+  ModalWindowController* controller =
+      container->GetProperty(kModalWindowControllerKey);
+  CHECK(controller);
+  return controller;
+}
+
+ModalWindowController::ModalWindowController(int priority)
+    : modal_container_(NULL),
+      dimmer_window_(new aura::Window(NULL)),
+      dimmed_(false) {
+  ScreenManager::ContainerParams params("ModalContainer", priority);
+  params.can_activate_children = true;
+  params.block_events = true;
+  modal_container_ = ScreenManager::Get()->CreateContainer(params);
+  modal_container_->SetProperty(kModalWindowControllerKey, this);
+
+  dimmer_window_->SetType(ui::wm::WINDOW_TYPE_NORMAL);
+  dimmer_window_->Init(aura::WINDOW_LAYER_SOLID_COLOR);
+  dimmer_window_->layer()->SetColor(SK_ColorBLACK);
+  dimmer_window_->layer()->SetOpacity(0.0f);
+  dimmer_window_->Show();
+
+  modal_container_->AddChild(dimmer_window_);
+  modal_container_->AddObserver(this);
+
+  UpdateDimmerWindowBounds();
+}
+
+ModalWindowController::~ModalWindowController() {
+  if (modal_container_)
+    modal_container_->RemoveObserver(this);
+}
+
+void ModalWindowController::OnWindowAdded(aura::Window* child) {
+  DCHECK_NE(child, dimmer_window_);
+  if (IsChildWindow(child)) {
+    child->AddObserver(this);
+    UpdateDimming(NULL);
+  }
+}
+
+void ModalWindowController::OnWindowVisibilityChanged(aura::Window* window,
+                                                      bool visible) {
+  if (IsChildWindow(window))
+    UpdateDimming(NULL);
+}
+
+void ModalWindowController::OnWindowBoundsChanged(aura::Window* window,
+                                                  const gfx::Rect& old_bounds,
+                                                  const gfx::Rect& new_bounds) {
+  if (window == modal_container_)
+    UpdateDimmerWindowBounds();
+}
+
+void ModalWindowController::OnWindowDestroyed(aura::Window* window) {
+  UpdateDimming(window);
+}
+
+bool ModalWindowController::IsChildWindow(aura::Window* child) const {
+  return child->parent() == modal_container_ && child != dimmer_window_;
+}
+
+void ModalWindowController::UpdateDimmerWindowBounds() {
+  gfx::Rect bounds(modal_container_->bounds().size());
+  dimmer_window_->SetBounds(bounds);
+}
+
+void ModalWindowController::UpdateDimming(aura::Window* ignore) {
+  if (!modal_container_ || !dimmer_window_)
+    return;
+  bool should_delete = true;
+  for (aura::Window* window : modal_container_->children()) {
+    if (window == dimmer_window_ || window == ignore)
+      continue;
+    should_delete = false;
+    if (window->TargetVisibility()) {
+      SetDimmed(true);
+      return;
+    }
+  }
+  SetDimmed(false);
+
+  if (should_delete) {
+    // Remove the container from root so that the container becomes
+    // invisible, but don't delete it until next event execution
+    // because the call stack may still have and use the pointer.
+    modal_container_->RemoveObserver(this);
+    modal_container_->parent()->RemoveChild(modal_container_);
+    base::MessageLoopForUI::current()->DeleteSoon(FROM_HERE, modal_container_);
+    modal_container_ = NULL;
+    dimmer_window_ = NULL;
+  }
+}
+
+void ModalWindowController::SetDimmed(bool dimmed) {
+  const float kDimmedOpacity = 0.4f;
+
+  if (!dimmer_window_ || dimmed_ == dimmed)
+    return;
+  dimmed_ = dimmed;
+
+  const int kDimmAnimationDurationMs = 500;
+  if (dimmed) {
+    ui::ScopedLayerAnimationSettings settings(
+        dimmer_window_->layer()->GetAnimator());
+    settings.SetTransitionDuration(
+        base::TimeDelta::FromMilliseconds(kDimmAnimationDurationMs));
+    dimmer_window_->layer()->SetOpacity(kDimmedOpacity);
+  } else {
+    // ScopedHidingAnimationSettings will detach the animating and
+    // recreate layers for the container so that animation can continue
+    // even if the container is removed immediately.
+    wm::ScopedHidingAnimationSettings settings(modal_container_);
+    settings.layer_animation_settings()->SetTransitionDuration(
+        base::TimeDelta::FromMilliseconds(kDimmAnimationDurationMs));
+    modal_container_->layer()->SetOpacity(0.0f);
+  }
+}
+
+}  // namespace athena
diff --git a/athena/screen/modal_window_controller.h b/athena/screen/modal_window_controller.h
new file mode 100644
index 0000000..b4c7ec5
--- /dev/null
+++ b/athena/screen/modal_window_controller.h
@@ -0,0 +1,59 @@
+// 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.
+
+#ifndef ATHENA_SCREEN_MODAL_WINDOW_CONTROLLER_H_
+#define ATHENA_SCREEN_MODAL_WINDOW_CONTROLLER_H_
+
+#include "athena/athena_export.h"
+#include "ui/aura/window_observer.h"
+
+namespace athena {
+
+// ModalWindow controller manages the modal window and
+// its container. This gets created when a modal window is opened
+// and deleted when all modal windows are deleted.
+class ATHENA_EXPORT ModalWindowController : public aura::WindowObserver {
+ public:
+  // Returns the ModalWindowController associated with the container.
+  static ModalWindowController* Get(aura::Window* container);
+
+  explicit ModalWindowController(int container_priority);
+  virtual ~ModalWindowController();
+
+  aura::Window* modal_container() { return modal_container_; }
+
+  bool dimmed() const { return dimmed_; }
+
+ private:
+  // aura::WindowObserver:
+  virtual void OnWindowAdded(aura::Window* child) override;
+  virtual void OnWindowVisibilityChanged(aura::Window* window,
+                                         bool visible) override;
+  virtual void OnWindowBoundsChanged(aura::Window* window,
+                                     const gfx::Rect& old_bounds,
+                                     const gfx::Rect& new_bounds) override;
+  virtual void OnWindowDestroyed(aura::Window* window) override;
+
+  // Tells if the child is not a dimmer window and a child of the modal
+  // container.
+  bool IsChildWindow(aura::Window* child) const;
+
+  void UpdateDimmerWindowBounds();
+
+  // Change dimming state based on the visible window in the container.
+  void UpdateDimming(aura::Window* ignore);
+
+  // Note: changing true -> false will delete the modal_container_.
+  void SetDimmed(bool dimmed);
+
+  aura::Window* modal_container_;  // not owned.
+  aura::Window* dimmer_window_;    // not owned.
+
+  bool dimmed_;
+  DISALLOW_COPY_AND_ASSIGN(ModalWindowController);
+};
+
+}  // namespace athena
+
+#endif  // ATHENA_SCREEN_MODAL_WINDOW_CONTROLLER_H_
diff --git a/athena/screen/modal_window_controller_unittest.cc b/athena/screen/modal_window_controller_unittest.cc
new file mode 100644
index 0000000..b73399a
--- /dev/null
+++ b/athena/screen/modal_window_controller_unittest.cc
@@ -0,0 +1,144 @@
+// 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 "athena/screen/modal_window_controller.h"
+#include "athena/screen/screen_manager_impl.h"
+#include "athena/test/base/athena_test_base.h"
+#include "athena/test/base/test_windows.h"
+#include "athena/util/container_priorities.h"
+#include "ui/aura/test/test_window_delegate.h"
+#include "ui/aura/window.h"
+
+namespace athena {
+
+typedef test::AthenaTestBase ModalWindowControllerTest;
+
+aura::Window* FindContainerByPriority(int priority) {
+  ScreenManagerImpl* screen_manager =
+      static_cast<ScreenManagerImpl*>(ScreenManager::Get());
+  return screen_manager->FindContainerByPriority(priority);
+}
+
+TEST_F(ModalWindowControllerTest, ModalContainer) {
+  aura::test::EventCountDelegate delegate;
+  scoped_ptr<aura::Window> modal(test::CreateTransientWindow(
+      &delegate, NULL, ui::MODAL_TYPE_SYSTEM, false));
+
+  aura::Window* modal_container = FindContainerByPriority(CP_SYSTEM_MODAL);
+  EXPECT_TRUE(modal_container);
+
+  ModalWindowController* modal_controller =
+      ModalWindowController::Get(modal_container);
+  ASSERT_TRUE(modal_controller);
+  EXPECT_EQ(modal_container, modal->parent());
+  EXPECT_FALSE(modal_controller->dimmed());
+  modal->Show();
+  EXPECT_TRUE(modal_controller->dimmed());
+
+  modal->Hide();
+  EXPECT_TRUE(FindContainerByPriority(CP_SYSTEM_MODAL));
+  EXPECT_FALSE(modal_controller->dimmed());
+
+  modal->Show();
+  EXPECT_TRUE(FindContainerByPriority(CP_SYSTEM_MODAL));
+  EXPECT_TRUE(modal_controller->dimmed());
+
+  modal.reset();
+  EXPECT_FALSE(FindContainerByPriority(CP_SYSTEM_MODAL));
+
+  // Create two.
+  modal = test::CreateTransientWindow(
+              &delegate, NULL, ui::MODAL_TYPE_SYSTEM, false).Pass();
+  scoped_ptr<aura::Window> modal2(test::CreateTransientWindow(
+      &delegate, NULL, ui::MODAL_TYPE_SYSTEM, false));
+
+  modal_container = FindContainerByPriority(CP_SYSTEM_MODAL);
+  EXPECT_TRUE(modal_container);
+  modal_controller = ModalWindowController::Get(modal_container);
+  ASSERT_TRUE(modal_controller);
+  EXPECT_EQ(modal_container, modal->parent());
+  EXPECT_EQ(modal_container, modal2->parent());
+
+  EXPECT_FALSE(modal_controller->dimmed());
+  modal->Show();
+  EXPECT_TRUE(modal_controller->dimmed());
+  modal2->Show();
+  EXPECT_TRUE(modal_controller->dimmed());
+
+  modal->Hide();
+  EXPECT_TRUE(modal_controller->dimmed());
+  modal2->Hide();
+  EXPECT_FALSE(modal_controller->dimmed());
+  EXPECT_TRUE(FindContainerByPriority(CP_SYSTEM_MODAL));
+
+  modal2.reset();
+  EXPECT_TRUE(FindContainerByPriority(CP_SYSTEM_MODAL));
+  EXPECT_FALSE(modal_controller->dimmed());
+
+  modal.reset();
+  EXPECT_FALSE(FindContainerByPriority(CP_SYSTEM_MODAL));
+}
+
+TEST_F(ModalWindowControllerTest, NestedModalWindows) {
+  ScreenManager::ContainerParams params("top", CP_END);
+  params.can_activate_children = true;
+  params.modal_container_priority = CP_END + 1;
+  aura::Window* top_container = ScreenManager::Get()->CreateContainer(params);
+
+  aura::test::TestWindowDelegate delegate;
+  scoped_ptr<aura::Window> top_w1(
+      test::CreateNormalWindow(&delegate, top_container));
+  EXPECT_EQ(top_container, top_w1->parent());
+
+  aura::Window* default_container = FindContainerByPriority(CP_DEFAULT);
+  EXPECT_TRUE(default_container);
+
+  scoped_ptr<aura::Window> normal_w1(test::CreateNormalWindow(&delegate, NULL));
+  EXPECT_EQ(default_container, normal_w1->parent());
+
+  scoped_ptr<aura::Window> normal_m1(test::CreateTransientWindow(
+      &delegate, normal_w1.get(), ui::MODAL_TYPE_SYSTEM, false));
+  aura::Window* default_modal_container =
+      FindContainerByPriority(CP_SYSTEM_MODAL);
+  EXPECT_EQ(default_modal_container, normal_m1->parent());
+
+  // A modal window with the transient parent which doesn't specify
+  // the modal container should fallback the default container's modal
+  // container.
+  aura::Window* home_container = FindContainerByPriority(CP_DEFAULT);
+  EXPECT_TRUE(home_container);
+
+  scoped_ptr<aura::Window> normal_m2(test::CreateTransientWindow(
+      &delegate, home_container, ui::MODAL_TYPE_SYSTEM, false));
+  EXPECT_EQ(default_modal_container, normal_m2->parent());
+
+  // No modal container for top container yet.
+  EXPECT_FALSE(FindContainerByPriority(CP_END + 1));
+
+  // Creating a modal with always on top creates the modal dialog on top
+  // most dialog container.
+  scoped_ptr<aura::Window> top_m0(test::CreateTransientWindow(
+      &delegate, NULL, ui::MODAL_TYPE_SYSTEM, true));
+
+  aura::Window* top_modal_container = FindContainerByPriority(CP_END + 1);
+  EXPECT_EQ(top_modal_container, top_m0->parent());
+
+  // Creating a modal dialog with transient parent on the top container
+  // creates the winodw on the top container's modal container.
+  scoped_ptr<aura::Window> top_m1(test::CreateTransientWindow(
+      &delegate, top_w1.get(), ui::MODAL_TYPE_SYSTEM, true));
+  EXPECT_EQ(top_modal_container, top_m1->parent());
+
+  normal_m1.reset();
+  EXPECT_TRUE(FindContainerByPriority(CP_SYSTEM_MODAL));
+  normal_m2.reset();
+  EXPECT_FALSE(FindContainerByPriority(CP_SYSTEM_MODAL));
+
+  top_m0.reset();
+  EXPECT_TRUE(FindContainerByPriority(CP_END + 1));
+  top_m1.reset();
+  EXPECT_FALSE(FindContainerByPriority(CP_END + 1));
+}
+
+}  // namespace athena
diff --git a/athena/screen/public/screen_manager.h b/athena/screen/public/screen_manager.h
index e263782..11dda1f 100644
--- a/athena/screen/public/screen_manager.h
+++ b/athena/screen/public/screen_manager.h
@@ -29,11 +29,37 @@ class ATHENA_EXPORT ScreenManager {
     // True if the container can activate its child window.
     bool can_activate_children;
 
-    // True if the container will grab all of input events.
-    bool grab_inputs;
+    // True if the container will block evnets from containers behind it.
+    bool block_events;
 
     // Defines the z_order priority of the container.
     int z_order_priority;
+
+    // True if this container should be used as a default parent.
+    bool default_parent;
+
+    // The container priority used to open modal dialog window
+    // created with this container as a transient parent  (Note: A modal window
+    // should
+    // use a trnasient parent, not a direct parent, or no transient parent.)
+    //
+    // Default is -1, and it will fallback to the container behind this
+    // container,
+    // that has the modal container proiroty.
+    //
+    // The modal container for modal window is selected as follows.
+    // 1) a window must be created with |aura::client::kModalKey| property
+    //   without explicit parent set.
+    // 2.a) If aura::client::kAlwaysOnTopKey is NOT set, it uses the stand flow
+    //   described above. (fallback to containers behind this).
+    // 2.b) If aura::client::kAlwaysOnTopKey is set, it searches the top most
+    //   container which has |modal_container_priority| != -1.
+    // 3) Look for the container with |modal_container_priority|, and create
+    //   one if it doesn't exist.
+    //
+    // Created modal container will self destruct if last modal window
+    // is deleted.
+    int modal_container_priority;
   };
 
   // Creates, returns and deletes the singleton object of the ScreenManager
@@ -44,11 +70,6 @@ class ATHENA_EXPORT ScreenManager {
 
   virtual ~ScreenManager() {}
 
-  // Creates the container window that is used when creating a normal
-  // widget without specific parent.
-  virtual aura::Window* CreateDefaultContainer(
-      const ContainerParams& params) = 0;
-
   // Creates the container window on the screen.
   virtual aura::Window* CreateContainer(const ContainerParams& params) = 0;
 
diff --git a/athena/screen/screen_accelerator_handler.h b/athena/screen/screen_accelerator_handler.h
index ab57879..fcde448 100644
--- a/athena/screen/screen_accelerator_handler.h
+++ b/athena/screen/screen_accelerator_handler.h
@@ -1,6 +1,8 @@
 // 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.
+#ifndef ATHENA_SCREEN_SCREEN_ACCELERATOR_HANDLER_H_
+#define ATHENA_SCREEN_SCREEN_ACCELERATOR_HANDLER_H_
 
 #include "athena/input/public/accelerator_manager.h"
 
@@ -31,3 +33,5 @@ class ScreenAcceleratorHandler : public AcceleratorHandler {
 };
 
 }  // namespace athena
+
+#endif  // ATHENA_SCREEN_SCREEN_ACCELERATOR_HANDLER_H_
diff --git a/athena/screen/screen_manager_impl.cc b/athena/screen/screen_manager_impl.cc
index 3ece198..5182b7e 100644
--- a/athena/screen/screen_manager_impl.cc
+++ b/athena/screen/screen_manager_impl.cc
@@ -2,23 +2,22 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "athena/screen/public/screen_manager.h"
+#include "athena/screen/screen_manager_impl.h"
 
 #include "athena/input/public/accelerator_manager.h"
+#include "athena/screen/modal_window_controller.h"
 #include "athena/screen/screen_accelerator_handler.h"
 #include "athena/util/container_priorities.h"
 #include "athena/util/fill_layout_manager.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/screen_position_client.h"
-#include "ui/aura/client/window_tree_client.h"
-#include "ui/aura/layout_manager.h"
 #include "ui/aura/test/test_screen.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
 #include "ui/aura/window_targeter.h"
 #include "ui/aura/window_tree_host.h"
-#include "ui/compositor/layer.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/screen.h"
 #include "ui/wm/core/base_focus_rules.h"
@@ -26,6 +25,9 @@
 #include "ui/wm/core/focus_controller.h"
 #include "ui/wm/core/window_util.h"
 
+// This is to avoid creating type definitoin for kAlwaysOnTopKey.
+DECLARE_EXPORTED_WINDOW_PROPERTY_TYPE(ATHENA_EXPORT, bool);
+
 namespace athena {
 namespace {
 
@@ -33,12 +35,38 @@ DEFINE_OWNED_WINDOW_PROPERTY_KEY(ScreenManager::ContainerParams,
                                  kContainerParamsKey,
                                  NULL);
 
-ScreenManager* instance = NULL;
+ScreenManagerImpl* instance = NULL;
+
+// A functor to find a container that has the higher priority.
+struct HigherPriorityFinder {
+  HigherPriorityFinder(int p) : priority(p) {}
+  bool operator()(aura::Window* window) {
+    return window->GetProperty(kContainerParamsKey)->z_order_priority >
+           priority;
+  }
+  int priority;
+};
 
-bool GrabsInput(aura::Window* container) {
+bool BlockEvents(aura::Window* container) {
   ScreenManager::ContainerParams* params =
       container->GetProperty(kContainerParamsKey);
-  return params && params->grab_inputs;
+  return params && params->block_events;
+}
+
+bool DefaultContainer(aura::Window* container) {
+  ScreenManager::ContainerParams* params =
+      container->GetProperty(kContainerParamsKey);
+  return params && params->default_parent;
+}
+
+bool HasModalContainerPriority(aura::Window* container) {
+  ScreenManager::ContainerParams* params =
+      container->GetProperty(kContainerParamsKey);
+  return params && params->modal_container_priority != -1;
+}
+
+bool IsSystemModal(aura::Window* window) {
+  return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_SYSTEM;
 }
 
 // Returns the container which contains |window|.
@@ -61,47 +89,34 @@ class AthenaFocusRules : public wm::BaseFocusRules {
     return params && params->can_activate_children;
   }
   virtual bool CanActivateWindow(aura::Window* window) const override {
-    // Check if containers of higher z-order than |window| have 'grab_inputs'
+    if (!window)
+      return true;
+
+    // Check if containers of higher z-order than |window| have 'block_events'
     // fields.
-    if (window) {
+    if (window->GetRootWindow()) {
       const aura::Window::Windows& containers =
           window->GetRootWindow()->children();
       aura::Window::Windows::const_iterator iter =
           std::find(containers.begin(), containers.end(), GetContainer(window));
       DCHECK(iter != containers.end());
       for (++iter; iter != containers.end(); ++iter) {
-        if (GrabsInput(*iter))
+        if (BlockEvents(*iter))
           return false;
       }
     }
     return BaseFocusRules::CanActivateWindow(window);
   }
 
- private:
-  DISALLOW_COPY_AND_ASSIGN(AthenaFocusRules);
-};
-
-class AthenaWindowTreeClient : public aura::client::WindowTreeClient {
- public:
-  explicit AthenaWindowTreeClient(aura::Window* container)
-      : container_(container) {}
-
- private:
-  virtual ~AthenaWindowTreeClient() {}
-
-  // aura::client::WindowTreeClient:
-  virtual aura::Window* GetDefaultParent(aura::Window* context,
-                                         aura::Window* window,
-                                         const gfx::Rect& bounds) override {
-    aura::Window* transient_parent = wm::GetTransientParent(window);
-    if (transient_parent)
-      return GetContainer(transient_parent);
-    return container_;
+  virtual aura::Window* GetNextActivatableWindow(
+      aura::Window* ignore) const override {
+    aura::Window* next = wm::BaseFocusRules::GetNextActivatableWindow(ignore);
+    // TODO(oshima): Search from activatable containers if |next| is NULL.
+    return next;
   }
 
-  aura::Window* container_;
-
-  DISALLOW_COPY_AND_ASSIGN(AthenaWindowTreeClient);
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AthenaFocusRules);
 };
 
 class AthenaScreenPositionClient : public aura::client::ScreenPositionClient {
@@ -140,93 +155,56 @@ class AthenaScreenPositionClient : public aura::client::ScreenPositionClient {
   DISALLOW_COPY_AND_ASSIGN(AthenaScreenPositionClient);
 };
 
-class AthenaEventTargeter : public aura::WindowTargeter,
-                            public aura::WindowObserver {
+class AthenaWindowTargeter : public aura::WindowTargeter {
  public:
-  explicit AthenaEventTargeter(aura::Window* container)
-      : container_(container) {
-    container_->AddObserver(this);
-  }
+  explicit AthenaWindowTargeter(aura::Window* root_window)
+      : root_window_(root_window) {}
 
-  virtual ~AthenaEventTargeter() {
-    // Removed before the container is removed.
-    if (container_)
-      container_->RemoveObserver(this);
-  }
-
-  void SetPreviousEventTargeter(scoped_ptr<ui::EventTargeter> targeter) {
-    previous_root_event_targeter_ = targeter.Pass();
-  }
+  virtual ~AthenaWindowTargeter() {}
 
  private:
   // aura::WindowTargeter:
   virtual bool SubtreeCanAcceptEvent(
       ui::EventTarget* target,
       const ui::LocatedEvent& event) const override {
+    const aura::Window::Windows& containers = root_window_->children();
+    auto r_iter =
+        std::find_if(containers.rbegin(), containers.rend(), &BlockEvents);
+    if (r_iter == containers.rend())
+      return aura::WindowTargeter::SubtreeCanAcceptEvent(target, event);
+
     aura::Window* window = static_cast<aura::Window*>(target);
-    const aura::Window::Windows& containers =
-        container_->GetRootWindow()->children();
-    aura::Window::Windows::const_iterator iter =
-        std::find(containers.begin(), containers.end(), container_);
-    DCHECK(iter != containers.end());
-    for (; iter != containers.end(); ++iter) {
-      if ((*iter)->Contains(window))
-        return true;
+    for (;; --r_iter) {
+      if ((*r_iter)->Contains(window))
+        return aura::WindowTargeter::SubtreeCanAcceptEvent(target, event);
+      if (r_iter == containers.rbegin())
+        break;
     }
     return false;
   }
 
-  // aura::WindowObserver:
-  virtual void OnWindowDestroying(aura::Window* window) override {
-    aura::Window* root_window = container_->GetRootWindow();
-    DCHECK_EQ(window, container_);
-    DCHECK_EQ(
-        this, static_cast<ui::EventTarget*>(root_window)->GetEventTargeter());
-
-    container_->RemoveObserver(this);
-    container_ = NULL;
-
-    // This will remove myself.
-    root_window->SetEventTargeter(previous_root_event_targeter_.Pass());
+  virtual ui::EventTarget* FindTargetForLocatedEvent(
+      ui::EventTarget* root,
+      ui::LocatedEvent* event) override {
+    ui::EventTarget* target =
+        aura::WindowTargeter::FindTargetForLocatedEvent(root, event);
+    if (target)
+      return target;
+    // If the root target is blocking the event, return the container even if
+    // there is no target found so that windows behind it will not be searched.
+    const ScreenManager::ContainerParams* params =
+        static_cast<aura::Window*>(root)->GetProperty(kContainerParamsKey);
+    return (params && params->block_events) ? root : NULL;
   }
 
-  aura::Window* container_;
-  scoped_ptr<ui::EventTargeter> previous_root_event_targeter_;
-
-  DISALLOW_COPY_AND_ASSIGN(AthenaEventTargeter);
-};
-
-class ScreenManagerImpl : public ScreenManager {
- public:
-  explicit ScreenManagerImpl(aura::Window* root_window);
-  virtual ~ScreenManagerImpl();
-
-  void Init();
-
- private:
-  // ScreenManager:
-  virtual aura::Window* CreateDefaultContainer(
-      const ContainerParams& params) override;
-  virtual aura::Window* CreateContainer(const ContainerParams& params) override;
-  virtual aura::Window* GetContext() override { return root_window_; }
-  virtual void SetRotation(gfx::Display::Rotation rotation) override;
-  virtual void SetRotationLocked(bool rotation_locked) override;
-
   // Not owned.
   aura::Window* root_window_;
 
-  scoped_ptr<aura::client::FocusClient> focus_client_;
-  scoped_ptr<aura::client::WindowTreeClient> window_tree_client_;
-  scoped_ptr<AcceleratorHandler> accelerator_handler_;
-  scoped_ptr< ::wm::ScopedCaptureClient> capture_client_;
-  scoped_ptr<aura::client::ScreenPositionClient> screen_position_client_;
-
-  gfx::Display::Rotation last_requested_rotation_;
-  bool rotation_locked_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScreenManagerImpl);
+  DISALLOW_COPY_AND_ASSIGN(AthenaWindowTargeter);
 };
 
+}  // namespace
+
 ScreenManagerImpl::ScreenManagerImpl(aura::Window* root_window)
     : root_window_(root_window),
       last_requested_rotation_(gfx::Display::ROTATE_0),
@@ -266,77 +244,49 @@ void ScreenManagerImpl::Init() {
   root_window_->SetLayoutManager(new FillLayoutManager(root_window_));
   capture_client_.reset(new ::wm::ScopedCaptureClient(root_window_));
   accelerator_handler_.reset(new ScreenAcceleratorHandler(root_window_));
-}
 
-aura::Window* ScreenManagerImpl::CreateDefaultContainer(
-    const ContainerParams& params) {
-  aura::Window* container = CreateContainer(params);
-  window_tree_client_.reset(new AthenaWindowTreeClient(container));
-  aura::client::SetWindowTreeClient(root_window_, window_tree_client_.get());
+  aura::client::SetWindowTreeClient(root_window_, this);
 
   screen_position_client_.reset(new AthenaScreenPositionClient());
   aura::client::SetScreenPositionClient(root_window_,
                                         screen_position_client_.get());
-
-  return container;
+  root_window_->SetEventTargeter(
+      make_scoped_ptr(new AthenaWindowTargeter(root_window_)));
 }
 
-// A functor to find a container that has the higher priority.
-struct HigherPriorityFinder {
-  HigherPriorityFinder(int p) : priority(p) {}
-  bool operator()(aura::Window* window) {
-    return window->GetProperty(kContainerParamsKey)->z_order_priority >
-           priority;
+aura::Window* ScreenManagerImpl::FindContainerByPriority(int priority) {
+  for (aura::Window* window : root_window_->children()) {
+    if (window->GetProperty(kContainerParamsKey)->z_order_priority == priority)
+      return window;
   }
-  int priority;
-};
-
-#if !defined(NDEBUG)
-struct PriorityMatcher {
-  PriorityMatcher(int p) : priority(p) {}
-  bool operator()(aura::Window* window) {
-    return window->GetProperty(kContainerParamsKey)->z_order_priority ==
-           priority;
-  }
-  int priority;
-};
-#endif
+  return NULL;
+}
 
 aura::Window* ScreenManagerImpl::CreateContainer(
     const ContainerParams& params) {
+  const aura::Window::Windows& children = root_window_->children();
+
+  if (params.default_parent) {
+    CHECK(std::find_if(children.begin(), children.end(), &DefaultContainer) ==
+          children.end());
+  }
+  // mmodal container's priority must be higher than the container's priority.
+  DCHECK(params.modal_container_priority == -1 ||
+         params.modal_container_priority > params.z_order_priority);
+  // Default parent must specify modal_container_priority.
+  DCHECK(!params.default_parent || params.modal_container_priority != -1);
+
   aura::Window* container = new aura::Window(NULL);
   CHECK_GE(params.z_order_priority, 0);
   container->Init(aura::WINDOW_LAYER_NOT_DRAWN);
   container->SetName(params.name);
 
-  const aura::Window::Windows& children = root_window_->children();
-
-#if !defined(NDEBUG)
-  DCHECK(std::find_if(children.begin(),
-                      children.end(),
-                      PriorityMatcher(params.z_order_priority))
-         == children.end())
-      << "The container with the priority "
-      << params.z_order_priority << " already exists.";
-#endif
+  DCHECK(!FindContainerByPriority(params.z_order_priority))
+      << "The container with the priority " << params.z_order_priority
+      << " already exists.";
 
   container->SetProperty(kContainerParamsKey, new ContainerParams(params));
 
-  // If another container is already grabbing the input, SetEventTargeter
-  // implicitly release the grabbing and remove the EventTargeter instance.
-  // TODO(mukai|oshima): think about the ideal behavior of multiple grabbing
-  // and implement it.
-  if (params.grab_inputs) {
-    DCHECK(std::find_if(children.begin(), children.end(), &GrabsInput)
-           == children.end())
-        << "input has already been grabbed by another container";
-    AthenaEventTargeter* athena_event_targeter =
-        new AthenaEventTargeter(container);
-    athena_event_targeter->SetPreviousEventTargeter(
-        root_window_->SetEventTargeter(
-            scoped_ptr<ui::EventTargeter>(athena_event_targeter)));
-  }
-
   root_window_->AddChild(container);
 
   aura::Window::Windows::const_iterator iter =
@@ -350,6 +300,10 @@ aura::Window* ScreenManagerImpl::CreateContainer(
   return container;
 }
 
+aura::Window* ScreenManagerImpl::GetContext() {
+  return root_window_;
+}
+
 void ScreenManagerImpl::SetRotation(gfx::Display::Rotation rotation) {
   last_requested_rotation_ = rotation;
   if (rotation_locked_ || rotation ==
@@ -369,14 +323,62 @@ void ScreenManagerImpl::SetRotationLocked(bool rotation_locked) {
     SetRotation(last_requested_rotation_);
 }
 
-}  // namespace
+int ScreenManagerImpl::GetModalContainerPriority(aura::Window* window,
+                                                 aura::Window* parent) {
+  const aura::Window::Windows& children = root_window_->children();
+  if (window->GetProperty(aura::client::kAlwaysOnTopKey)) {
+    // Use top most modal container.
+    auto iter = std::find_if(
+        children.rbegin(), children.rend(), &HasModalContainerPriority);
+    DCHECK(iter != children.rend());
+    return (*iter)->GetProperty(kContainerParamsKey)->modal_container_priority;
+  } else {
+    // use the container closest to the parent which has modal
+    // container priority.
+    auto iter = std::find(children.rbegin(), children.rend(), parent);
+    DCHECK(iter != children.rend());
+    iter = std::find_if(iter, children.rend(), &HasModalContainerPriority);
+    DCHECK(iter != children.rend());
+    return (*iter)->GetProperty(kContainerParamsKey)->modal_container_priority;
+  }
+}
+
+aura::Window* ScreenManagerImpl::GetDefaultParent(aura::Window* context,
+                                                  aura::Window* window,
+                                                  const gfx::Rect& bounds) {
+  aura::Window* parent = wm::GetTransientParent(window);
+  if (parent)
+    parent = GetContainer(parent);
+  else
+    parent = GetDefaultContainer();
+
+  if (IsSystemModal(window)) {
+    DCHECK(window->type() == ui::wm::WINDOW_TYPE_NORMAL ||
+           window->type() == ui::wm::WINDOW_TYPE_POPUP);
+    int priority = GetModalContainerPriority(window, parent);
+
+    parent = FindContainerByPriority(priority);
+    if (!parent) {
+      ModalWindowController* controller = new ModalWindowController(priority);
+      parent = controller->modal_container();
+    }
+  }
+  return parent;
+}
+
+aura::Window* ScreenManagerImpl::GetDefaultContainer() {
+  const aura::Window::Windows& children = root_window_->children();
+  return *(std::find_if(children.begin(), children.end(), &DefaultContainer));
+}
 
 ScreenManager::ContainerParams::ContainerParams(const std::string& n,
                                                 int priority)
     : name(n),
       can_activate_children(false),
-      grab_inputs(false),
-      z_order_priority(priority) {
+      block_events(false),
+      z_order_priority(priority),
+      default_parent(false),
+      modal_container_priority(-1) {
 }
 
 // static
diff --git a/athena/screen/screen_manager_impl.h b/athena/screen/screen_manager_impl.h
new file mode 100644
index 0000000..1738542
--- /dev/null
+++ b/athena/screen/screen_manager_impl.h
@@ -0,0 +1,72 @@
+// 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.
+
+#ifndef ATHENA_SCREEN_SCREEN_MANAGER_IMPL_H_
+#define ATHENA_SCREEN_SCREEN_MANAGER_IMPL_H_
+
+#include "athena/athena_export.h"
+#include "athena/screen/public/screen_manager.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/aura/client/window_tree_client.h"
+
+namespace aura {
+namespace client {
+class FocusClient;
+class ScreenPositionClient;
+}
+}
+
+namespace wm {
+class ScopedCaptureClient;
+}
+
+namespace athena {
+class AcceleratorHandler;
+
+class ATHENA_EXPORT ScreenManagerImpl : public ScreenManager,
+                                        public aura::client::WindowTreeClient {
+ public:
+  explicit ScreenManagerImpl(aura::Window* root_window);
+  virtual ~ScreenManagerImpl();
+
+  void Init();
+
+  // Returns a container which has |priority|. Null if such container
+  // doesn't exist.
+  aura::Window* FindContainerByPriority(int priority);
+
+ private:
+  // ScreenManager:
+  virtual aura::Window* CreateContainer(const ContainerParams& params) override;
+  virtual aura::Window* GetContext() override;
+  virtual void SetRotation(gfx::Display::Rotation rotation) override;
+  virtual void SetRotationLocked(bool rotation_locked) override;
+
+  // aura::client::WindowTreeClient:
+  virtual aura::Window* GetDefaultParent(aura::Window* context,
+                                         aura::Window* window,
+                                         const gfx::Rect& bounds) override;
+
+  int GetModalContainerPriority(aura::Window* window, aura::Window* parent);
+
+  // Returns a container with |params.default_parent| == true.
+  aura::Window* GetDefaultContainer();
+
+  // Not owned.
+  aura::Window* root_window_;
+
+  scoped_ptr<aura::client::FocusClient> focus_client_;
+  scoped_ptr<AcceleratorHandler> accelerator_handler_;
+  scoped_ptr<::wm::ScopedCaptureClient> capture_client_;
+  scoped_ptr<aura::client::ScreenPositionClient> screen_position_client_;
+
+  gfx::Display::Rotation last_requested_rotation_;
+  bool rotation_locked_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenManagerImpl);
+};
+
+}  // namespace athena
+
+#endif  // ATHENA_SCREEN_SCREEN_MANAGER_IMPL_H_
diff --git a/athena/screen/screen_manager_unittest.cc b/athena/screen/screen_manager_unittest.cc
index ed8b248..c8787da 100644
--- a/athena/screen/screen_manager_unittest.cc
+++ b/athena/screen/screen_manager_unittest.cc
@@ -2,15 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "athena/screen/public/screen_manager.h"
-
 #include <algorithm>
 #include <string>
 
+#include "athena/screen/screen_manager_impl.h"
 #include "athena/test/base/athena_test_base.h"
+#include "athena/test/base/test_windows.h"
 #include "athena/util/container_priorities.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/window.h"
+#include "ui/aura/window_targeter.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/wm/core/window_util.h"
 
@@ -111,12 +112,83 @@ TEST_F(ScreenManagerTest, NonActivatableContainer) {
   EXPECT_TRUE(wm::CanActivateWindow(window.get()));
 }
 
-TEST_F(ScreenManagerTest, GrabInputContainer) {
+TEST_F(ScreenManagerTest, BlockInputsShouldNotBlockVirtualKeyboard) {
+  ScreenManager::ContainerParams block_params("blocking", kTestZOrderPriority);
+  block_params.can_activate_children = true;
+  block_params.block_events = true;
+  aura::Window* block_container =
+      ScreenManager::Get()->CreateContainer(block_params);
+
+  aura::test::EventCountDelegate block_delegate;
+  scoped_ptr<aura::Window> block_window(CreateWindow(
+      block_container, &block_delegate, gfx::Rect(0, 0, 100, 100)));
+  EXPECT_TRUE(wm::CanActivateWindow(block_window.get()));
+
+  // Create a normal container appearing over the |block_container|. This is
+  // essentially the case of virtual keyboard.
+  ScreenManager::ContainerParams vk_params("virtual keyboard",
+                                           kTestZOrderPriority + 1);
+  vk_params.can_activate_children = true;
+  aura::Window* vk_container = ScreenManager::Get()->CreateContainer(vk_params);
+
+  aura::test::EventCountDelegate vk_delegate;
+  scoped_ptr<aura::Window> vk_window(
+      CreateWindow(vk_container, &vk_delegate, gfx::Rect(0, 20, 100, 80)));
+  EXPECT_TRUE(wm::CanActivateWindow(vk_window.get()));
+
+  ui::test::EventGenerator event_generator(root_window());
+  event_generator.MoveMouseTo(10, 25);
+  event_generator.ClickLeftButton();
+  EXPECT_EQ("0 0", block_delegate.GetMouseButtonCountsAndReset());
+  EXPECT_EQ("1 1", vk_delegate.GetMouseButtonCountsAndReset());
+}
+
+TEST_F(ScreenManagerTest, DefaultContainer) {
+  ScreenManagerImpl* impl =
+      static_cast<ScreenManagerImpl*>(ScreenManager::Get());
+  aura::Window* original_default = impl->FindContainerByPriority(CP_DEFAULT);
+  aura::Window* parent = original_default->parent();
+  // Temporarily remove the original default container from tree.
+  parent->RemoveChild(original_default);
+
+  ScreenManager::ContainerParams params("new_default", CP_END + 1);
+  params.default_parent = true;
+  params.modal_container_priority = CP_END + 2;
+  aura::Window* new_default = ScreenManager::Get()->CreateContainer(params);
+  aura::Window* w = test::CreateNormalWindow(NULL, NULL).release();
+  EXPECT_EQ(new_default, w->parent());
+  delete new_default;
+
+  // Add the original back to shutdown properly.
+  parent->AddChild(original_default);
+}
+
+namespace {
+
+class ScreenManagerTargeterTest
+    : public athena::test::AthenaTestBase,
+      public testing::WithParamInterface<bool> {
+ public:
+  ScreenManagerTargeterTest()
+      : targeter_(GetParam() ? NULL : new aura::WindowTargeter) {}
+  virtual ~ScreenManagerTargeterTest() {}
+
+ protected:
+  scoped_ptr<ui::EventTargeter> targeter_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScreenManagerTargeterTest);
+};
+
+}  // namespace
+
+TEST_P(ScreenManagerTargeterTest, BlockContainer) {
   ScreenManager::ContainerParams normal_params(
       "normal", kTestZOrderPriority);
   normal_params.can_activate_children = true;
   aura::Window* normal_container =
       ScreenManager::Get()->CreateContainer(normal_params);
+  normal_container->SetEventTargeter(targeter_.Pass());
 
   aura::test::EventCountDelegate normal_delegate;
   scoped_ptr<aura::Window> normal_window(CreateWindow(
@@ -132,76 +204,48 @@ TEST_F(ScreenManagerTest, GrabInputContainer) {
   event_generator.ReleaseKey(ui::VKEY_A, ui::EF_NONE);
   EXPECT_EQ("1 1", normal_delegate.GetKeyCountsAndReset());
 
-  ScreenManager::ContainerParams grab_params(
-      "grabbing", kTestZOrderPriority + 1);
-  grab_params.can_activate_children = true;
-  grab_params.grab_inputs = true;
-  aura::Window* grab_container =
-      ScreenManager::Get()->CreateContainer(grab_params);
+  ScreenManager::ContainerParams block_params("blocking",
+                                              kTestZOrderPriority + 1);
+  block_params.can_activate_children = true;
+  block_params.block_events = true;
+  aura::Window* block_container =
+      ScreenManager::Get()->CreateContainer(block_params);
 
   EXPECT_FALSE(wm::CanActivateWindow(normal_window.get()));
 
-  aura::test::EventCountDelegate grab_delegate;
-  scoped_ptr<aura::Window> grab_window(CreateWindow(
-      grab_container, &grab_delegate, gfx::Rect(10, 10, 100, 100)));
-  EXPECT_TRUE(wm::CanActivateWindow(grab_window.get()));
+  aura::test::EventCountDelegate block_delegate;
+  scoped_ptr<aura::Window> block_window(CreateWindow(
+      block_container, &block_delegate, gfx::Rect(10, 10, 100, 100)));
+  EXPECT_TRUE(wm::CanActivateWindow(block_window.get()));
 
-  wm::ActivateWindow(grab_window.get());
+  wm::ActivateWindow(block_window.get());
 
   // (0, 0) is still on normal_window, but the event should not go there
-  // because grabbing_container prevents it.
+  // because blockbing_container prevents it.
   event_generator.MoveMouseTo(0, 0);
   event_generator.ClickLeftButton();
   EXPECT_EQ("0 0", normal_delegate.GetMouseButtonCountsAndReset());
-  EXPECT_EQ("0 0", grab_delegate.GetMouseButtonCountsAndReset());
+  EXPECT_EQ("0 0", block_delegate.GetMouseButtonCountsAndReset());
+  event_generator.MoveMouseWheel(0, 10);
+  // EXPECT_EQ(0, normal_event_counter.num_scroll_events());
 
   event_generator.MoveMouseTo(20, 20);
   event_generator.ClickLeftButton();
-  EXPECT_EQ("1 1", grab_delegate.GetMouseButtonCountsAndReset());
+  EXPECT_EQ("1 1", block_delegate.GetMouseButtonCountsAndReset());
 
   event_generator.PressKey(ui::VKEY_A, ui::EF_NONE);
   event_generator.ReleaseKey(ui::VKEY_A, ui::EF_NONE);
   EXPECT_EQ("0 0", normal_delegate.GetKeyCountsAndReset());
-  EXPECT_EQ("1 1", grab_delegate.GetKeyCountsAndReset());
-}
-
-TEST_F(ScreenManagerTest, GrabShouldNotBlockVirtualKeyboard) {
-  ScreenManager::ContainerParams grab_params("grabbing", kTestZOrderPriority);
-  grab_params.can_activate_children = true;
-  grab_params.grab_inputs = true;
-  aura::Window* grab_container =
-      ScreenManager::Get()->CreateContainer(grab_params);
-
-  aura::test::EventCountDelegate grab_delegate;
-  scoped_ptr<aura::Window> grab_window(
-      CreateWindow(grab_container, &grab_delegate, gfx::Rect(0, 0, 100, 100)));
-  EXPECT_TRUE(wm::CanActivateWindow(grab_window.get()));
-
-  // Create a normal container appearing over the |grab_container|. This is
-  // essentially the case of virtual keyboard.
-  ScreenManager::ContainerParams vk_params(
-      "virtual keyboard", kTestZOrderPriority + 1);
-  vk_params.can_activate_children = true;
-  aura::Window* vk_container = ScreenManager::Get()->CreateContainer(vk_params);
-
-  aura::test::EventCountDelegate vk_delegate;
-  scoped_ptr<aura::Window> vk_window(
-      CreateWindow(vk_container, &vk_delegate, gfx::Rect(0, 20, 100, 80)));
-  EXPECT_TRUE(wm::CanActivateWindow(vk_window.get()));
-
-  ui::test::EventGenerator event_generator(root_window());
-  event_generator.MoveMouseTo(10, 25);
-  event_generator.ClickLeftButton();
-  EXPECT_EQ("0 0", grab_delegate.GetMouseButtonCountsAndReset());
-  EXPECT_EQ("1 1", vk_delegate.GetMouseButtonCountsAndReset());
+  EXPECT_EQ("1 1", block_delegate.GetKeyCountsAndReset());
 }
 
-TEST_F(ScreenManagerTest, GrabAndMouseCapture) {
+TEST_P(ScreenManagerTargeterTest, BlockAndMouseCapture) {
   ScreenManager::ContainerParams normal_params(
       "normal", kTestZOrderPriority);
   normal_params.can_activate_children = true;
   aura::Window* normal_container =
       ScreenManager::Get()->CreateContainer(normal_params);
+  normal_container->SetEventTargeter(targeter_.Pass());
 
   aura::test::EventCountDelegate normal_delegate;
   scoped_ptr<aura::Window> normal_window(CreateWindow(
@@ -211,29 +255,33 @@ TEST_F(ScreenManagerTest, GrabAndMouseCapture) {
   event_generator.MoveMouseTo(0, 0);
   event_generator.PressLeftButton();
 
-  // Creating grabbing container while mouse pressing.
-  ScreenManager::ContainerParams grab_params(
-      "grabbing", kTestZOrderPriority + 1);
-  grab_params.can_activate_children = true;
-  grab_params.grab_inputs = true;
-  aura::Window* grab_container =
-      ScreenManager::Get()->CreateContainer(grab_params);
+  // Creating blocking container while mouse pressing.
+  ScreenManager::ContainerParams block_params("blocking",
+                                              kTestZOrderPriority + 1);
+  block_params.can_activate_children = true;
+  block_params.block_events = true;
+  aura::Window* block_container =
+      ScreenManager::Get()->CreateContainer(block_params);
 
-  aura::test::EventCountDelegate grab_delegate;
-  scoped_ptr<aura::Window> grab_window(CreateWindow(
-      grab_container, &grab_delegate, gfx::Rect(10, 10, 100, 100)));
+  aura::test::EventCountDelegate block_delegate;
+  scoped_ptr<aura::Window> block_window(CreateWindow(
+      block_container, &block_delegate, gfx::Rect(10, 10, 100, 100)));
 
   // Release event should be sent to |normal_window| because it captures the
   // mouse event.
   event_generator.ReleaseLeftButton();
   EXPECT_EQ("1 1", normal_delegate.GetMouseButtonCountsAndReset());
-  EXPECT_EQ("0 0", grab_delegate.GetMouseButtonCountsAndReset());
+  EXPECT_EQ("0 0", block_delegate.GetMouseButtonCountsAndReset());
 
   // After release, further mouse events should not be sent to |normal_window|
-  // because grab_container grabs the input.
+  // because block_container blocks the input.
   event_generator.ClickLeftButton();
   EXPECT_EQ("0 0", normal_delegate.GetMouseButtonCountsAndReset());
-  EXPECT_EQ("0 0", grab_delegate.GetMouseButtonCountsAndReset());
+  EXPECT_EQ("0 0", block_delegate.GetMouseButtonCountsAndReset());
 }
 
+INSTANTIATE_TEST_CASE_P(WithOrWithoutTargeter,
+                        ScreenManagerTargeterTest,
+                        testing::Values(false, true));
+
 }  // namespace athena