Make event-targeting asynchronous in window server.

services/ui/ws/event_dispatcher_unittest.cc

 // Copyright 2015 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 "services/ui/ws/event_dispatcher.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <queue>
 
+#include "base/command_line.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/weak_ptr.h"
+#include "base/run_loop.h"
+#include "base/test/scoped_task_environment.h"
 #include "services/ui/common/accelerator_util.h"
 #include "services/ui/ws/accelerator.h"
 #include "services/ui/ws/event_dispatcher_delegate.h"
 #include "services/ui/ws/server_window.h"
 #include "services/ui/ws/test_server_window_delegate.h"
 #include "services/ui/ws/test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/events/event.h"
 
 namespace ui {
@@ skipping 74 matching lines @@
   ServerWindow* lost_capture_window() { return lost_capture_window_; }
 
   // EventDispatcherDelegate:
   void SetFocusedWindowFromEventDispatcher(ServerWindow* window) override {
     focused_window_ = window;
   }
 
  private:
   // EventDispatcherDelegate:
   void OnAccelerator(uint32_t accelerator,
-                     const int64_t display_id,
+                     int64_t display_id,
                      const ui::Event& event,
                      AcceleratorPhase phase) override {
     EXPECT_EQ(0u, last_accelerator_);
     last_accelerator_ = accelerator;
     last_accelerator_phase_ = phase;
   }
   ServerWindow* GetFocusedWindowForEventDispatcher(
-      const int64_t display_id) override {
+      int64_t display_id) override {
     return focused_window_;
   }
   void SetNativeCapture(ServerWindow* window) override {}
   void ReleaseNativeCapture() override {
     if (delegate_)
       delegate_->ReleaseCapture();
   }
   void UpdateNativeCursorFromDispatcher() override {}
   void OnCaptureChanged(ServerWindow* new_capture_window,
                         ServerWindow* old_capture_window) override {
     lost_capture_window_ = old_capture_window;
   }
   void OnMouseCursorLocationChanged(const gfx::Point& point,
-                                    const int64_t display_id) override {}
+                                    int64_t display_id) override {}
   void DispatchInputEventToWindow(ServerWindow* target,
                                   ClientSpecificId client_id,
-                                  const int64_t display_id,
+                                  int64_t display_id,
                                   const ui::Event& event,
                                   Accelerator* accelerator) override {
     std::unique_ptr<DispatchedEventDetails> details(new DispatchedEventDetails);
     details->window = target;
     details->client_id = client_id;
     details->event = ui::Event::Clone(event);
     details->accelerator = accelerator;
     dispatched_event_queue_.push(std::move(details));
   }
+  void ProcessNextEventFromQueue() override {}
   ClientSpecificId GetEventTargetClientId(const ServerWindow* window,
                                           bool in_nonclient_area) override {
     return in_nonclient_area ? kNonclientAreaId : kClientAreaId;
   }
   ServerWindow* GetRootWindowContaining(gfx::Point* location_in_display,
                                         int64_t* display_id) override {
     return root_;
   }
   void OnEventTargetNotFound(const ui::Event& event,
-                             const int64_t display_id) override {
+                             int64_t display_id) override {
     last_event_target_not_found_ = ui::Event::Clone(event);
   }
 
   Delegate* delegate_;
   ServerWindow* focused_window_;
   ServerWindow* lost_capture_window_;
   uint32_t last_accelerator_;
   AcceleratorPhase last_accelerator_phase_ = AcceleratorPhase::POST;
   std::queue<std::unique_ptr<DispatchedEventDetails>> dispatched_event_queue_;
   ServerWindow* root_ = nullptr;
@@ skipping 27 matching lines @@
   }
 
   ASSERT_EQ(target, details->window);
   ASSERT_TRUE(details->event);
   ASSERT_TRUE(details->event->IsLocatedEvent());
   ASSERT_TRUE(details->IsClientArea());
   ASSERT_EQ(root_location, details->event->AsLocatedEvent()->root_location());
   ASSERT_EQ(location, details->event->AsLocatedEvent()->location());
 }
 
-void RunMouseEventTests(EventDispatcher* dispatcher,
-                        TestEventDispatcherDelegate* dispatcher_delegate,
-                        MouseEventTest* tests,
-                        size_t test_count) {
-  for (size_t i = 0; i < test_count; ++i) {
-    const MouseEventTest& test = tests[i];
-    ASSERT_FALSE(dispatcher_delegate->has_queued_events())
-        << " unexpected queued events before running " << i;
-    dispatcher->ProcessEvent(ui::PointerEvent(test.input_event), 0,
-                             EventDispatcher::AcceleratorMatchPhase::ANY);
-
-    std::unique_ptr<DispatchedEventDetails> details =
-        dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
-    ASSERT_NO_FATAL_FAILURE(ExpectDispatchedEventDetailsMatches(
-        details.get(), test.expected_target_window1,
-        test.expected_root_location1, test.expected_location1))
-        << " details don't match " << i;
-    details = dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
-    ASSERT_NO_FATAL_FAILURE(ExpectDispatchedEventDetailsMatches(
-        details.get(), test.expected_target_window2,
-        test.expected_root_location2, test.expected_location2))
-        << " details2 don't match " << i;
-    ASSERT_FALSE(dispatcher_delegate->has_queued_events())
-        << " unexpected queued events after running " << i;
-  }
-}
-
 }  // namespace
 
 // Test fixture for EventDispatcher with friend access to verify the internal
 // state. Setup creates a TestServerWindowDelegate, a visible root ServerWindow,
 // a TestEventDispatcher and the EventDispatcher for testing.
-class EventDispatcherTest : public testing::Test,
+class EventDispatcherTest : public testing::TestWithParam<bool>,
                             public TestEventDispatcherDelegate::Delegate {
  public:
   EventDispatcherTest() {}
   ~EventDispatcherTest() override {}
 
   ServerWindow* root_window() { return root_window_.get(); }
   TestEventDispatcherDelegate* test_event_dispatcher_delegate() {
     return test_event_dispatcher_delegate_.get();
   }
   EventDispatcher* event_dispatcher() { return event_dispatcher_.get(); }
 
+  void RunTasks();
+  void RunMouseEventTests(EventDispatcher* dispatcher,
+                          TestEventDispatcherDelegate* dispatcher_delegate,
+                          MouseEventTest* tests,
+                          size_t test_count);
   bool AreAnyPointersDown() const;
   // Deletes everything created during SetUp()
   void ClearSetup();
   std::unique_ptr<ServerWindow> CreateChildWindowWithParent(
       const WindowId& id,
       ServerWindow* parent);
   // Creates a window which is a child of |root_window_|.
   std::unique_ptr<ServerWindow> CreateChildWindow(const WindowId& id);
   bool IsMouseButtonDown() const;
   bool IsWindowPointerTarget(const ServerWindow* window) const;
   int NumberPointerTargetsForWindow(ServerWindow* window) const;
   ServerWindow* GetActiveSystemModalWindow() const;
 
  protected:
-  // testing::Test:
+  // testing::TestWithParam<bool>:
   void SetUp() override;
 
  private:
   // TestEventDispatcherDelegate::Delegate:
   void ReleaseCapture() override {
     event_dispatcher_->SetCaptureWindow(nullptr, kInvalidClientId);
   }
 
   std::unique_ptr<TestServerWindowDelegate> window_delegate_;
   std::unique_ptr<ServerWindow> root_window_;
   std::unique_ptr<TestEventDispatcherDelegate> test_event_dispatcher_delegate_;
   std::unique_ptr<EventDispatcher> event_dispatcher_;
 
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
+
   DISALLOW_COPY_AND_ASSIGN(EventDispatcherTest);
 };
 
+void EventDispatcherTest::RunTasks() {

[sadrul, 2017/06/07 20:16:04]

Because you are calling this only after calling dispatcher()->ProcessEvent(),
can you instead introduce a 'DispatchEvent()' function in the test, that does
both?

[riajiang, 2017/06/07 21:46:25]

It's also used after SetMousePointerDisplayLocation, so I moved RunTasks to
private and added DispatchEvent and SetMousePointerDisplayLocation that do both.

+  bool enable_async_event_targeting = GetParam();
+  if (!enable_async_event_targeting)
+    return;
+
+  base::RunLoop runloop;
+  runloop.RunUntilIdle();
+}
+
+void EventDispatcherTest::RunMouseEventTests(
+    EventDispatcher* dispatcher,
+    TestEventDispatcherDelegate* dispatcher_delegate,
+    MouseEventTest* tests,
+    size_t test_count) {
+  for (size_t i = 0; i < test_count; ++i) {
+    const MouseEventTest& test = tests[i];
+    ASSERT_FALSE(dispatcher_delegate->has_queued_events())
+        << " unexpected queued events before running " << i;
+    dispatcher->ProcessEvent(ui::PointerEvent(test.input_event), 0,
+                             EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
+
+    std::unique_ptr<DispatchedEventDetails> details =
+        dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
+    ASSERT_NO_FATAL_FAILURE(ExpectDispatchedEventDetailsMatches(
+        details.get(), test.expected_target_window1,
+        test.expected_root_location1, test.expected_location1))
+        << " details don't match " << i;
+    details = dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
+    ASSERT_NO_FATAL_FAILURE(ExpectDispatchedEventDetailsMatches(
+        details.get(), test.expected_target_window2,
+        test.expected_root_location2, test.expected_location2))
+        << " details2 don't match " << i;
+    ASSERT_FALSE(dispatcher_delegate->has_queued_events())
+        << " unexpected queued events after running " << i;
+  }
+}
+
 bool EventDispatcherTest::AreAnyPointersDown() const {
   return EventDispatcherTestApi(event_dispatcher_.get()).AreAnyPointersDown();
 }
 
 void EventDispatcherTest::ClearSetup() {
   window_delegate_.reset();
   root_window_.reset();
   test_event_dispatcher_delegate_.reset();
   event_dispatcher_.reset();
 }
@@ skipping 29 matching lines @@
       .NumberPointerTargetsForWindow(window);
 }
 
 ServerWindow* EventDispatcherTest::GetActiveSystemModalWindow() const {
   ModalWindowController* mwc =
       EventDispatcherTestApi(event_dispatcher_.get()).modal_window_controller();
   return ModalWindowControllerTestApi(mwc).GetActiveSystemModalWindow();
 }
 
 void EventDispatcherTest::SetUp() {
-  testing::Test::SetUp();
+  bool enable_async_event_targeting = GetParam();
+  if (enable_async_event_targeting) {
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
+        "enable-async-event-targeting");
+  }
+  testing::TestWithParam<bool>::SetUp();
 
   window_delegate_ = base::MakeUnique<TestServerWindowDelegate>();
   root_window_ =
       base::MakeUnique<ServerWindow>(window_delegate_.get(), WindowId(1, 2));
   window_delegate_->set_root_window(root_window_.get());
   root_window_->SetVisible(true);
 
   test_event_dispatcher_delegate_ =
       base::MakeUnique<TestEventDispatcherDelegate>(this);
   event_dispatcher_ =
       base::MakeUnique<EventDispatcher>(test_event_dispatcher_delegate_.get());
   test_event_dispatcher_delegate_->set_root(root_window_.get());
 }
 
-TEST_F(EventDispatcherTest, ProcessEvent) {
+TEST_P(EventDispatcherTest, ProcessEvent) {
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   // Send event that is over child.
   const ui::PointerEvent ui_event(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(20, 25), gfx::Point(20, 25),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(ui_event, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   std::unique_ptr<DispatchedEventDetails> details =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   ASSERT_EQ(child.get(), details->window);
 
   ASSERT_TRUE(details->event);
   ASSERT_TRUE(details->event->IsPointerEvent());
 
   ui::PointerEvent* dispatched_event = details->event->AsPointerEvent();
   EXPECT_EQ(gfx::Point(20, 25), dispatched_event->root_location());
   EXPECT_EQ(gfx::Point(10, 15), dispatched_event->location());
 }
 
-TEST_F(EventDispatcherTest, ProcessEventNoTarget) {
+TEST_P(EventDispatcherTest, ProcessEventNoTarget) {
   // Send event without a target.
   ui::KeyEvent key(ui::ET_KEY_PRESSED, ui::VKEY_A, ui::EF_NONE);
   event_dispatcher()->ProcessEvent(key, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   // Event wasn't dispatched to a target.
   std::unique_ptr<DispatchedEventDetails> details =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(details);
 
   // Delegate was informed that there wasn't a target.
   ui::Event* event_out =
       test_event_dispatcher_delegate()->last_event_target_not_found();
   ASSERT_TRUE(event_out);
   EXPECT_TRUE(event_out->IsKeyEvent());
   EXPECT_EQ(ui::VKEY_A, event_out->AsKeyEvent()->key_code());
 }
 
-TEST_F(EventDispatcherTest, AcceleratorBasic) {
+TEST_P(EventDispatcherTest, AcceleratorBasic) {
   ClearSetup();
   TestEventDispatcherDelegate event_dispatcher_delegate(nullptr);
   EventDispatcher dispatcher(&event_dispatcher_delegate);
 
   uint32_t accelerator_1 = 1;
   mojom::EventMatcherPtr matcher = ui::CreateKeyMatcher(
       ui::mojom::KeyboardCode::W, ui::mojom::kEventFlagControlDown);
   EXPECT_TRUE(dispatcher.AddAccelerator(accelerator_1, std::move(matcher)));
 
   uint32_t accelerator_2 = 2;
@@ skipping 17 matching lines @@
   uint32_t accelerator_3 = 3;
   matcher = ui::CreateKeyMatcher(ui::mojom::KeyboardCode::T,
                                  ui::mojom::kEventFlagNone);
   EXPECT_FALSE(dispatcher.AddAccelerator(accelerator_3, std::move(matcher)));
 
   matcher = ui::CreateKeyMatcher(ui::mojom::KeyboardCode::T,
                                  ui::mojom::kEventFlagControlDown);
   EXPECT_TRUE(dispatcher.AddAccelerator(accelerator_3, std::move(matcher)));
 }
 
-TEST_F(EventDispatcherTest, EventMatching) {
+TEST_P(EventDispatcherTest, EventMatching) {
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   EventDispatcher* dispatcher = event_dispatcher();
 
   mojom::EventMatcherPtr matcher = ui::CreateKeyMatcher(
       ui::mojom::KeyboardCode::W, ui::mojom::kEventFlagControlDown);
   uint32_t accelerator_1 = 1;
   dispatcher->AddAccelerator(accelerator_1, std::move(matcher));
 
   ui::KeyEvent key(ui::ET_KEY_PRESSED, ui::VKEY_W, ui::EF_CONTROL_DOWN);
   dispatcher->ProcessEvent(key, 0, EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   EXPECT_EQ(accelerator_1,
             event_dispatcher_delegate->GetAndClearLastAccelerator());
 
   // EF_NUM_LOCK_ON should be ignored since CreateKeyMatcher defaults to
   // ignoring.
   key = ui::KeyEvent(ui::ET_KEY_PRESSED, ui::VKEY_W,
                      ui::EF_CONTROL_DOWN | ui::EF_NUM_LOCK_ON);
   dispatcher->ProcessEvent(key, 0, EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   EXPECT_EQ(accelerator_1,
             event_dispatcher_delegate->GetAndClearLastAccelerator());
 
   key = ui::KeyEvent(ui::ET_KEY_PRESSED, ui::VKEY_W, ui::EF_NONE);
   dispatcher->ProcessEvent(key, 0, EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   EXPECT_EQ(0u, event_dispatcher_delegate->GetAndClearLastAccelerator());
 
   uint32_t accelerator_2 = 2;
   matcher = ui::CreateKeyMatcher(ui::mojom::KeyboardCode::W,
                                  ui::mojom::kEventFlagNone);
   dispatcher->AddAccelerator(accelerator_2, std::move(matcher));
   dispatcher->ProcessEvent(key, 0, EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   EXPECT_EQ(accelerator_2,
             event_dispatcher_delegate->GetAndClearLastAccelerator());
 
   dispatcher->RemoveAccelerator(accelerator_2);
   dispatcher->ProcessEvent(key, 0, EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   EXPECT_EQ(0u, event_dispatcher_delegate->GetAndClearLastAccelerator());
 }
 
 // Tests that a post-target accelerator is not triggered by ProcessEvent.
-TEST_F(EventDispatcherTest, PostTargetAccelerator) {
+TEST_P(EventDispatcherTest, PostTargetAccelerator) {
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   EventDispatcher* dispatcher = event_dispatcher();
 
   mojom::EventMatcherPtr matcher = ui::CreateKeyMatcher(
       ui::mojom::KeyboardCode::W, ui::mojom::kEventFlagControlDown);
   matcher->accelerator_phase = ui::mojom::AcceleratorPhase::POST_TARGET;
   uint32_t accelerator_1 = 1;
   dispatcher->AddAccelerator(accelerator_1, std::move(matcher));
 
   ui::KeyEvent key(ui::ET_KEY_PRESSED, ui::VKEY_W, ui::EF_CONTROL_DOWN);
   // The post-target accelerator should be fired if there is no focused window.
   dispatcher->ProcessEvent(key, 0, EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   EXPECT_EQ(accelerator_1,
             event_dispatcher_delegate->GetAndClearLastAccelerator());
   std::unique_ptr<DispatchedEventDetails> details =
       event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(details);
 
   // Set focused window for EventDispatcher dispatches key events.
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
   event_dispatcher_delegate->SetFocusedWindowFromEventDispatcher(child.get());
 
   // With a focused window the event should be dispatched.
   dispatcher->ProcessEvent(key, 0, EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   EXPECT_EQ(0u, event_dispatcher_delegate->GetAndClearLastAccelerator());
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_TRUE(details);
   EXPECT_TRUE(details->accelerator);
 
   base::WeakPtr<Accelerator> accelerator_weak_ptr =
       details->accelerator->GetWeakPtr();
   dispatcher->RemoveAccelerator(accelerator_1);
   EXPECT_FALSE(accelerator_weak_ptr);
 
   // Post deletion there should be no accelerator
   dispatcher->ProcessEvent(key, 0, EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   EXPECT_EQ(0u, event_dispatcher_delegate->GetAndClearLastAccelerator());
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_TRUE(details);
   EXPECT_FALSE(details->accelerator);
 }
 
-TEST_F(EventDispatcherTest, ProcessPost) {
+TEST_P(EventDispatcherTest, ProcessPost) {
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   EventDispatcher* dispatcher = event_dispatcher();
 
   uint32_t pre_id = 1;
   {
     mojom::EventMatcherPtr matcher = ui::CreateKeyMatcher(
         ui::mojom::KeyboardCode::W, ui::mojom::kEventFlagControlDown);
     matcher->accelerator_phase = ui::mojom::AcceleratorPhase::PRE_TARGET;
     dispatcher->AddAccelerator(pre_id, std::move(matcher));
   }
 
   uint32_t post_id = 2;
   {
     mojom::EventMatcherPtr matcher = ui::CreateKeyMatcher(
         ui::mojom::KeyboardCode::W, ui::mojom::kEventFlagControlDown);
     matcher->accelerator_phase = ui::mojom::AcceleratorPhase::POST_TARGET;
     dispatcher->AddAccelerator(post_id, std::move(matcher));
   }
 
   // Set focused window for EventDispatcher dispatches key events.
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
   event_dispatcher_delegate->SetFocusedWindowFromEventDispatcher(child.get());
 
   // Dispatch for ANY, which should trigger PRE and not call
   // DispatchInputEventToWindow().
   ui::KeyEvent key(ui::ET_KEY_PRESSED, ui::VKEY_W, ui::EF_CONTROL_DOWN);
   dispatcher->ProcessEvent(key, 0, EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   EXPECT_EQ(EventDispatcherDelegate::AcceleratorPhase::PRE,
             event_dispatcher_delegate->last_accelerator_phase());
   EXPECT_EQ(pre_id, event_dispatcher_delegate->GetAndClearLastAccelerator());
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
 
   // Dispatch for POST, which should trigger POST.
   dispatcher->ProcessEvent(key, 0,
                            EventDispatcher::AcceleratorMatchPhase::POST_ONLY);
+  RunTasks();
   std::unique_ptr<DispatchedEventDetails> details =
       event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   ASSERT_TRUE(details->accelerator);
   EXPECT_EQ(post_id, details->accelerator->id());
 }
 
-TEST_F(EventDispatcherTest, Capture) {
+TEST_P(EventDispatcherTest, Capture) {
   ServerWindow* root = root_window();
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   MouseEventTest tests[] = {
       // Send a mouse down event over child.
       {ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(20, 25),
                       gfx::Point(20, 25), base::TimeTicks(),
@@ skipping 22 matching lines @@
                       gfx::Point(50, 50), base::TimeTicks(),
                       ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON),
        child.get(), gfx::Point(50, 50), gfx::Point(40, 40), root,
        gfx::Point(50, 50), gfx::Point(50, 50)},
 
   };
   RunMouseEventTests(event_dispatcher(), test_event_dispatcher_delegate(),
                      tests, arraysize(tests));
 }
 
-TEST_F(EventDispatcherTest, CaptureMultipleMouseButtons) {
+TEST_P(EventDispatcherTest, CaptureMultipleMouseButtons) {
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   MouseEventTest tests[] = {
       // Send a mouse down event over child with a left mouse button
       {ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(20, 25),
                       gfx::Point(20, 25), base::TimeTicks(),
                       ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON),
@@ skipping 22 matching lines @@
                       gfx::Point(50, 50), base::TimeTicks(),
                       ui::EF_LEFT_MOUSE_BUTTON, 0),
        child.get(), gfx::Point(50, 50), gfx::Point(40, 40), nullptr,
        gfx::Point(), gfx::Point()},
 
   };
   RunMouseEventTests(event_dispatcher(), test_event_dispatcher_delegate(),
                      tests, arraysize(tests));
 }
 
-TEST_F(EventDispatcherTest, ClientAreaGoesToOwner) {
+TEST_P(EventDispatcherTest, ClientAreaGoesToOwner) {
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   child->SetClientArea(gfx::Insets(5, 5, 5, 5), std::vector<gfx::Rect>());
 
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   EventDispatcher* dispatcher = event_dispatcher();
 
   // Start move loop by sending mouse event over non-client area.
   const ui::PointerEvent press_event(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(12, 12), gfx::Point(12, 12),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   dispatcher->ProcessEvent(press_event, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   // Events should target child and be in the non-client area.
   std::unique_ptr<DispatchedEventDetails> details =
       event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   ASSERT_TRUE(details);
   ASSERT_EQ(child.get(), details->window);
   EXPECT_TRUE(details->IsNonclientArea());
 
   // Move the mouse 5,6 pixels and target is the same.
   const ui::PointerEvent move_event(
       ui::MouseEvent(ui::ET_MOUSE_MOVED, gfx::Point(17, 18), gfx::Point(17, 18),
                      base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, 0));
   dispatcher->ProcessEvent(move_event, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   // Still same target.
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   ASSERT_EQ(child.get(), details->window);
   EXPECT_TRUE(details->IsNonclientArea());
 
   // Release the mouse.
   const ui::PointerEvent release_event(ui::MouseEvent(
       ui::ET_MOUSE_RELEASED, gfx::Point(17, 18), gfx::Point(17, 18),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   dispatcher->ProcessEvent(release_event, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   // The event should not have been dispatched to the delegate.
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   ASSERT_EQ(child.get(), details->window);
   EXPECT_TRUE(details->IsNonclientArea());
 
   // Press in the client area and verify target/client area. The non-client area
   // should get an exit first.
   const ui::PointerEvent press_event2(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(21, 22), gfx::Point(21, 22),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   dispatcher->ProcessEvent(press_event2, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_TRUE(event_dispatcher_delegate->has_queued_events());
   ASSERT_EQ(child.get(), details->window);
   EXPECT_TRUE(details->IsNonclientArea());
   EXPECT_EQ(ui::ET_POINTER_EXITED, details->event->type());
 
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   ASSERT_EQ(child.get(), details->window);
   EXPECT_TRUE(details->IsClientArea());
   EXPECT_EQ(ui::ET_POINTER_DOWN, details->event->type());
 }
 
-TEST_F(EventDispatcherTest, AdditionalClientArea) {
+TEST_P(EventDispatcherTest, AdditionalClientArea) {
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   std::vector<gfx::Rect> additional_client_areas;
   additional_client_areas.push_back(gfx::Rect(18, 0, 2, 2));
   child->SetClientArea(gfx::Insets(5, 5, 5, 5), additional_client_areas);
 
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   // Press in the additional client area, it should go to the child.
   const ui::PointerEvent press_event(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(28, 11), gfx::Point(28, 11),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(press_event, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   // Events should target child and be in the client area.
   std::unique_ptr<DispatchedEventDetails> details =
       event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   ASSERT_EQ(child.get(), details->window);
   EXPECT_TRUE(details->IsClientArea());
 }
 
-TEST_F(EventDispatcherTest, HitTestMask) {
+TEST_P(EventDispatcherTest, HitTestMask) {
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
   child->SetHitTestMask(gfx::Rect(2, 2, 16, 16));
 
   // Move in the masked area.
   const ui::PointerEvent move1(ui::MouseEvent(
       ui::ET_MOUSE_MOVED, gfx::Point(11, 11), gfx::Point(11, 11),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, 0));
   event_dispatcher()->ProcessEvent(move1, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   // Event went through the child window and hit the root.
   std::unique_ptr<DispatchedEventDetails> details1 =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(root_window(), details1->window);
   EXPECT_TRUE(details1->IsClientArea());
 
   child->ClearHitTestMask();
 
   // Move right in the same part of the window.
   const ui::PointerEvent move2(ui::MouseEvent(
       ui::ET_MOUSE_MOVED, gfx::Point(11, 12), gfx::Point(11, 12),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, 0));
   event_dispatcher()->ProcessEvent(move2, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   // Mouse exits the root.
   std::unique_ptr<DispatchedEventDetails> details2 =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(ui::ET_POINTER_EXITED, details2->event->type());
 
   // Mouse hits the child.
   std::unique_ptr<DispatchedEventDetails> details3 =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(child.get(), details3->window);
   EXPECT_TRUE(details3->IsClientArea());
 }
 
-TEST_F(EventDispatcherTest, DontFocusOnSecondDown) {
+TEST_P(EventDispatcherTest, DontFocusOnSecondDown) {
   std::unique_ptr<ServerWindow> child1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> child2 = CreateChildWindow(WindowId(1, 4));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child1->SetBounds(gfx::Rect(10, 10, 20, 20));
   child2->SetBounds(gfx::Rect(50, 51, 11, 12));
 
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   EventDispatcher* dispatcher = event_dispatcher();
 
   // Press on child1. First press event should change focus.
   const ui::PointerEvent press_event(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(12, 12), gfx::Point(12, 12),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   dispatcher->ProcessEvent(press_event, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   std::unique_ptr<DispatchedEventDetails> details =
       event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   EXPECT_EQ(child1.get(), details->window);
   EXPECT_EQ(child1.get(),
             event_dispatcher_delegate->GetAndClearLastFocusedWindow());
 
   // Press (with a different pointer id) on child2. Event should go to child2,
   // but focus should not change.
   const ui::PointerEvent touch_event(ui::TouchEvent(
       ui::ET_TOUCH_PRESSED, gfx::Point(53, 54), base::TimeTicks(),
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 2)));
   dispatcher->ProcessEvent(touch_event, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   EXPECT_EQ(child2.get(), details->window);
   EXPECT_EQ(nullptr, event_dispatcher_delegate->GetAndClearLastFocusedWindow());
 }
 
-TEST_F(EventDispatcherTest, TwoPointersActive) {
+TEST_P(EventDispatcherTest, TwoPointersActive) {
   std::unique_ptr<ServerWindow> child1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> child2 = CreateChildWindow(WindowId(1, 4));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child1->SetBounds(gfx::Rect(10, 10, 20, 20));
   child2->SetBounds(gfx::Rect(50, 51, 11, 12));
 
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   EventDispatcher* dispatcher = event_dispatcher();
 
   // Press on child1.
   const ui::PointerEvent touch_event1(ui::TouchEvent(
       ui::ET_TOUCH_PRESSED, gfx::Point(12, 13), base::TimeTicks(),
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 1)));
   dispatcher->ProcessEvent(touch_event1, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   std::unique_ptr<DispatchedEventDetails> details =
       event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(child1.get(), details->window);
 
   // Drag over child2, child1 should get the drag.
   const ui::PointerEvent drag_event1(ui::TouchEvent(
       ui::ET_TOUCH_MOVED, gfx::Point(53, 54), base::TimeTicks(),
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 1)));
   dispatcher->ProcessEvent(drag_event1, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(child1.get(), details->window);
 
   // Press on child2 with a different touch id.
   const ui::PointerEvent touch_event2(ui::TouchEvent(
       ui::ET_TOUCH_PRESSED, gfx::Point(54, 55), base::TimeTicks(),
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 2)));
   dispatcher->ProcessEvent(touch_event2, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(child2.get(), details->window);
 
   // Drag over child1 with id 2, child2 should continue to get the drag.
   const ui::PointerEvent drag_event2(ui::TouchEvent(
       ui::ET_TOUCH_MOVED, gfx::Point(13, 14), base::TimeTicks(),
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 2)));
   dispatcher->ProcessEvent(drag_event2, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(child2.get(), details->window);
 
   // Drag again with id 1, child1 should continue to get it.
   dispatcher->ProcessEvent(drag_event1, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(child1.get(), details->window);
 
   // Release touch id 1, and click on 2. 2 should get it.
   const ui::PointerEvent touch_release(ui::TouchEvent(
       ui::ET_TOUCH_RELEASED, gfx::Point(54, 55), base::TimeTicks(),
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 1)));
   dispatcher->ProcessEvent(touch_release, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(child1.get(), details->window);
   const ui::PointerEvent touch_event3(ui::TouchEvent(
       ui::ET_TOUCH_PRESSED, gfx::Point(54, 55), base::TimeTicks(),
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 2)));
   dispatcher->ProcessEvent(touch_event3, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(child2.get(), details->window);
 }
 
-TEST_F(EventDispatcherTest, DestroyWindowWhileGettingEvents) {
+TEST_P(EventDispatcherTest, DestroyWindowWhileGettingEvents) {
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   EventDispatcher* dispatcher = event_dispatcher();
 
   // Press on child.
   const ui::PointerEvent touch_event1(ui::TouchEvent(
       ui::ET_TOUCH_PRESSED, gfx::Point(12, 13), base::TimeTicks(),
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 1)));
   dispatcher->ProcessEvent(touch_event1, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   std::unique_ptr<DispatchedEventDetails> details =
       event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   EXPECT_EQ(child.get(), details->window);
 
   // Delete child, and continue the drag. Event should not be dispatched.
   child.reset();
 
   const ui::PointerEvent drag_event1(ui::TouchEvent(
       ui::ET_TOUCH_MOVED, gfx::Point(53, 54), base::TimeTicks(),
       ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 1)));
   dispatcher->ProcessEvent(drag_event1, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(nullptr, details.get());
 }
 
-TEST_F(EventDispatcherTest, MouseInExtendedHitTestRegion) {
+TEST_P(EventDispatcherTest, MouseInExtendedHitTestRegion) {
   ServerWindow* root = root_window();
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   EventDispatcher* dispatcher = event_dispatcher();
 
   // Send event that is not over child.
   const ui::PointerEvent ui_event(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(8, 9), gfx::Point(8, 9),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   dispatcher->ProcessEvent(ui_event, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   std::unique_ptr<DispatchedEventDetails> details =
       event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   ASSERT_EQ(root, details->window);
 
   // Release the mouse.
   const ui::PointerEvent release_event(ui::MouseEvent(
       ui::ET_MOUSE_RELEASED, gfx::Point(8, 9), gfx::Point(8, 9),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   dispatcher->ProcessEvent(release_event, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   ASSERT_EQ(root, details->window);
   EXPECT_TRUE(details->IsClientArea());
 
   // Change the extended hit test region and send event in extended hit test
   // region. Should result in exit for root, followed by press for child.
   child->set_extended_hit_test_region(gfx::Insets(5, 5, 5, 5));
   dispatcher->ProcessEvent(ui_event, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_EQ(root, details->window);
   EXPECT_EQ(ui::ET_POINTER_EXITED, details->event->type());
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
 
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   EXPECT_TRUE(details->IsNonclientArea());
   ASSERT_EQ(child.get(), details->window);
   EXPECT_EQ(ui::ET_POINTER_DOWN, details->event->type());
   ASSERT_TRUE(details->event.get());
   ASSERT_TRUE(details->event->IsPointerEvent());
   EXPECT_EQ(gfx::Point(-2, -1), details->event->AsPointerEvent()->location());
 }
 
-TEST_F(EventDispatcherTest, WheelWhileDown) {
+TEST_P(EventDispatcherTest, WheelWhileDown) {
   std::unique_ptr<ServerWindow> child1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> child2 = CreateChildWindow(WindowId(1, 4));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child1->SetBounds(gfx::Rect(10, 10, 20, 20));
   child2->SetBounds(gfx::Rect(50, 51, 11, 12));
 
   MouseEventTest tests[] = {
       // Send a mouse down event over child1.
       {ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(15, 15),
                       gfx::Point(15, 15), base::TimeTicks(),
                       ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON),
        child1.get(), gfx::Point(15, 15), gfx::Point(5, 5), nullptr,
        gfx::Point(), gfx::Point()},
       // Send mouse wheel over child2, should go to child1 as it has capture.
       {ui::MouseWheelEvent(gfx::Vector2d(1, 0), gfx::Point(53, 54),
                            gfx::Point(53, 54), base::TimeTicks(), ui::EF_NONE,
                            ui::EF_NONE),
        child1.get(), gfx::Point(53, 54), gfx::Point(43, 44), nullptr,
        gfx::Point(), gfx::Point()},
   };
   RunMouseEventTests(event_dispatcher(), test_event_dispatcher_delegate(),
                      tests, arraysize(tests));
 }
 
 // Tests that when explicit capture has been set that all events go to the
 // designated window, and that when capture is cleared, events find the
 // appropriate target window.
-TEST_F(EventDispatcherTest, SetExplicitCapture) {
+TEST_P(EventDispatcherTest, SetExplicitCapture) {
   ServerWindow* root = root_window();
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   EventDispatcher* dispatcher = event_dispatcher();
 
   {
     // Send all pointer events to the child.
     dispatcher->SetCaptureWindow(child.get(), kClientAreaId);
 
     // The mouse press should go to the child even though its outside its
     // bounds.
     const ui::PointerEvent left_press_event(ui::MouseEvent(
         ui::ET_MOUSE_PRESSED, gfx::Point(5, 5), gfx::Point(5, 5),
         base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
     dispatcher->ProcessEvent(left_press_event, 0,
                              EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
 
     // Events should target child.
     std::unique_ptr<DispatchedEventDetails> details =
         event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
 
     ASSERT_TRUE(details);
     ASSERT_EQ(child.get(), details->window);
     EXPECT_TRUE(details->IsClientArea());
     EXPECT_TRUE(IsMouseButtonDown());
 
     // The mouse down state should update while capture is set.
     const ui::PointerEvent right_press_event(ui::MouseEvent(
         ui::ET_MOUSE_PRESSED, gfx::Point(5, 5), gfx::Point(5, 5),
         base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON | ui::EF_RIGHT_MOUSE_BUTTON,
         ui::EF_RIGHT_MOUSE_BUTTON));
     dispatcher->ProcessEvent(right_press_event, 0,
                              EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
     details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
     EXPECT_TRUE(IsMouseButtonDown());
 
     // One button released should not clear mouse down
     const ui::PointerEvent left_release_event(ui::MouseEvent(
         ui::ET_MOUSE_RELEASED, gfx::Point(5, 5), gfx::Point(5, 5),
         base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON | ui::EF_RIGHT_MOUSE_BUTTON,
         ui::EF_LEFT_MOUSE_BUTTON));
     dispatcher->ProcessEvent(left_release_event, 0,
                              EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
     details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
     EXPECT_TRUE(IsMouseButtonDown());
 
     // Touch Event while mouse is down should not affect state.
     const ui::PointerEvent touch_event(ui::TouchEvent(
         ui::ET_TOUCH_PRESSED, gfx::Point(15, 15), base::TimeTicks(),
         ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 2)));
     dispatcher->ProcessEvent(touch_event, 0,
                              EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
     details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
     EXPECT_TRUE(IsMouseButtonDown());
 
     // Move event should not affect down
     const ui::PointerEvent move_event(
         ui::MouseEvent(ui::ET_MOUSE_MOVED, gfx::Point(15, 5), gfx::Point(15, 5),
                        base::TimeTicks(), ui::EF_RIGHT_MOUSE_BUTTON,
                        ui::EF_RIGHT_MOUSE_BUTTON));
     dispatcher->ProcessEvent(move_event, 0,
                              EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
     details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
     EXPECT_TRUE(IsMouseButtonDown());
 
     // All mouse buttons up should clear mouse down.
     const ui::PointerEvent right_release_event(
         ui::MouseEvent(ui::ET_MOUSE_RELEASED, gfx::Point(5, 5),
                        gfx::Point(5, 5), base::TimeTicks(),
                        ui::EF_RIGHT_MOUSE_BUTTON, ui::EF_RIGHT_MOUSE_BUTTON));
     dispatcher->ProcessEvent(right_release_event, 0,
                              EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
     details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
     EXPECT_FALSE(IsMouseButtonDown());
   }
 
   {
     // Releasing capture and sending the same event will go to the root.
     dispatcher->SetCaptureWindow(nullptr, kClientAreaId);
     const ui::PointerEvent press_event(ui::MouseEvent(
         ui::ET_MOUSE_PRESSED, gfx::Point(5, 5), gfx::Point(5, 5),
         base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
     dispatcher->ProcessEvent(press_event, 0,
                              EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
 
     // Events should target the root.
     std::unique_ptr<DispatchedEventDetails> details =
         event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
 
     ASSERT_TRUE(details);
     ASSERT_EQ(root, details->window);
   }
 }
 
 // This test verifies that explicit capture overrides and resets implicit
 // capture.
-TEST_F(EventDispatcherTest, ExplicitCaptureOverridesImplicitCapture) {
+TEST_P(EventDispatcherTest, ExplicitCaptureOverridesImplicitCapture) {
   ServerWindow* root = root_window();
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   EventDispatcher* dispatcher = event_dispatcher();
 
@@ skipping 27 matching lines @@
   RunMouseEventTests(dispatcher, event_dispatcher_delegate, tests,
                      arraysize(tests));
 
   // Add a second pointer target to the child.
   {
     const ui::PointerEvent touch_event(ui::TouchEvent(
         ui::ET_TOUCH_PRESSED, gfx::Point(12, 13), base::TimeTicks(),
         ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 1)));
     dispatcher->ProcessEvent(touch_event, 0,
                              EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
   }
 
   std::unique_ptr<DispatchedEventDetails> details =
       event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   EXPECT_EQ(child.get(), details->window);
 
   // Verify that no window has explicit capture and hence we did indeed do
   // implicit capture.
   ASSERT_EQ(nullptr, dispatcher->capture_window());
@@ skipping 13 matching lines @@
   ASSERT_TRUE(details);
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   EXPECT_EQ(child.get(), details->window);
   EXPECT_EQ(ui::ET_POINTER_EXITED, details->event->type());
 
   const ui::PointerEvent press_event(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(15, 15), gfx::Point(15, 15),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   dispatcher->ProcessEvent(press_event, 0,
                            EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   // Events should target the root.
   details = event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   ASSERT_EQ(root, details->window);
   ASSERT_TRUE(details->IsNonclientArea());
 }
 
 // Tests that setting capture does delete active pointer targets for the capture
 // window.
-TEST_F(EventDispatcherTest, CaptureUpdatesActivePointerTargets) {
+TEST_P(EventDispatcherTest, CaptureUpdatesActivePointerTargets) {
   ServerWindow* root = root_window();
   root->SetBounds(gfx::Rect(0, 0, 100, 100));
 
   EventDispatcher* dispatcher = event_dispatcher();
   {
     const ui::PointerEvent press_event(ui::MouseEvent(
         ui::ET_MOUSE_PRESSED, gfx::Point(5, 5), gfx::Point(5, 5),
         base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
     dispatcher->ProcessEvent(press_event, 0,
                              EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
 
     std::unique_ptr<DispatchedEventDetails> details =
         test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
     ASSERT_TRUE(details);
     ASSERT_EQ(root, details->window);
   }
   {
     const ui::PointerEvent touch_event(ui::TouchEvent(
         ui::ET_TOUCH_PRESSED, gfx::Point(12, 13), base::TimeTicks(),
         ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 1)));
     dispatcher->ProcessEvent(touch_event, 0,
                              EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
   }
 
   ASSERT_TRUE(AreAnyPointersDown());
   ASSERT_TRUE(IsWindowPointerTarget(root));
   EXPECT_EQ(2, NumberPointerTargetsForWindow(root));
 
   // Setting the capture should clear the implicit pointers for the specified
   // window.
   dispatcher->SetCaptureWindow(root, kNonclientAreaId);
   EXPECT_FALSE(AreAnyPointersDown());
   EXPECT_FALSE(IsWindowPointerTarget(root));
 }
 
 // Tests that when explicit capture is changed, that the previous window with
 // capture is no longer being observed.
-TEST_F(EventDispatcherTest, UpdatingCaptureStopsObservingPreviousCapture) {
+TEST_P(EventDispatcherTest, UpdatingCaptureStopsObservingPreviousCapture) {
   std::unique_ptr<ServerWindow> child1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> child2 = CreateChildWindow(WindowId(1, 4));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child1->SetBounds(gfx::Rect(10, 10, 20, 20));
   child2->SetBounds(gfx::Rect(50, 51, 11, 12));
 
   EventDispatcher* dispatcher = event_dispatcher();
   ASSERT_FALSE(AreAnyPointersDown());
   ASSERT_FALSE(IsWindowPointerTarget(child1.get()));
   ASSERT_FALSE(IsWindowPointerTarget(child2.get()));
   dispatcher->SetCaptureWindow(child1.get(), kClientAreaId);
   dispatcher->SetCaptureWindow(child2.get(), kClientAreaId);
   EXPECT_EQ(child1.get(),
             test_event_dispatcher_delegate()->lost_capture_window());
 
   // If observing does not stop during the capture update this crashes.
   child1->AddObserver(dispatcher);
 }
 
 // Tests that destroying a window with explicit capture clears the capture
 // state.
-TEST_F(EventDispatcherTest, DestroyingCaptureWindowRemovesExplicitCapture) {
+TEST_P(EventDispatcherTest, DestroyingCaptureWindowRemovesExplicitCapture) {
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   EventDispatcher* dispatcher = event_dispatcher();
   dispatcher->SetCaptureWindow(child.get(), kClientAreaId);
   EXPECT_EQ(child.get(), dispatcher->capture_window());
 
   ServerWindow* lost_capture_window = child.get();
   child.reset();
   EXPECT_EQ(nullptr, dispatcher->capture_window());
   EXPECT_EQ(lost_capture_window,
             test_event_dispatcher_delegate()->lost_capture_window());
 }
 
 // Tests that when |client_id| is set for a window performing capture, that this
 // preference is used regardless of whether an event targets the client region.
-TEST_F(EventDispatcherTest, CaptureInNonClientAreaOverridesActualPoint) {
+TEST_P(EventDispatcherTest, CaptureInNonClientAreaOverridesActualPoint) {
   ServerWindow* root = root_window();
   root->SetBounds(gfx::Rect(0, 0, 100, 100));
 
   root->SetClientArea(gfx::Insets(5, 5, 5, 5), std::vector<gfx::Rect>());
   EventDispatcher* dispatcher = event_dispatcher();
   dispatcher->SetCaptureWindow(root, kNonclientAreaId);
 
   TestEventDispatcherDelegate* event_dispatcher_delegate =
       test_event_dispatcher_delegate();
   // Press in the client area, it should be marked as non client.
   const ui::PointerEvent press_event(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(6, 6), gfx::Point(6, 6),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(press_event, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   // Events should target child and be in the client area.
   std::unique_ptr<DispatchedEventDetails> details =
       event_dispatcher_delegate->GetAndAdvanceDispatchedEventDetails();
   EXPECT_FALSE(event_dispatcher_delegate->has_queued_events());
   ASSERT_EQ(root, details->window);
   EXPECT_TRUE(details->IsNonclientArea());
 }
 
-TEST_F(EventDispatcherTest, ProcessPointerEvents) {
+TEST_P(EventDispatcherTest, ProcessPointerEvents) {
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   {
     const ui::PointerEvent pointer_event(ui::MouseEvent(
         ui::ET_MOUSE_PRESSED, gfx::Point(20, 25), gfx::Point(20, 25),
         base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
     event_dispatcher()->ProcessEvent(
         pointer_event, 0, EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
 
     std::unique_ptr<DispatchedEventDetails> details =
         test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
     ASSERT_TRUE(details);
     ASSERT_EQ(child.get(), details->window);
 
     ASSERT_TRUE(details->event);
     ASSERT_TRUE(details->event->IsPointerEvent());
 
     ui::PointerEvent* dispatched_event = details->event->AsPointerEvent();
     EXPECT_EQ(gfx::Point(20, 25), dispatched_event->root_location());
     EXPECT_EQ(gfx::Point(10, 15), dispatched_event->location());
   }
 
   {
     const int touch_id = 3;
     const ui::PointerEvent pointer_event(ui::TouchEvent(
         ui::ET_TOUCH_RELEASED, gfx::Point(25, 20), base::TimeTicks(),
         ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH,
                            touch_id)));
     event_dispatcher()->ProcessEvent(
         pointer_event, 0, EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
 
     std::unique_ptr<DispatchedEventDetails> details =
         test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
     ASSERT_TRUE(details);
     ASSERT_EQ(child.get(), details->window);
 
     ASSERT_TRUE(details->event);
     ASSERT_TRUE(details->event->IsPointerEvent());
 
     ui::PointerEvent* dispatched_event = details->event->AsPointerEvent();
     EXPECT_EQ(gfx::Point(25, 20), dispatched_event->root_location());
     EXPECT_EQ(gfx::Point(15, 10), dispatched_event->location());
     EXPECT_EQ(touch_id, dispatched_event->pointer_details().id);
   }
 }
 
-TEST_F(EventDispatcherTest, ResetClearsPointerDown) {
+TEST_P(EventDispatcherTest, ResetClearsPointerDown) {
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   // Send event that is over child.
   const ui::PointerEvent ui_event(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(20, 25), gfx::Point(20, 25),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(ui_event, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   std::unique_ptr<DispatchedEventDetails> details =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   ASSERT_EQ(child.get(), details->window);
 
   EXPECT_TRUE(AreAnyPointersDown());
 
   event_dispatcher()->Reset();
   EXPECT_FALSE(test_event_dispatcher_delegate()->has_queued_events());
   EXPECT_FALSE(AreAnyPointersDown());
 }
 
-TEST_F(EventDispatcherTest, ResetClearsCapture) {
+TEST_P(EventDispatcherTest, ResetClearsCapture) {
   ServerWindow* root = root_window();
   root->SetBounds(gfx::Rect(0, 0, 100, 100));
 
   root->SetClientArea(gfx::Insets(5, 5, 5, 5), std::vector<gfx::Rect>());
   EventDispatcher* dispatcher = event_dispatcher();
   dispatcher->SetCaptureWindow(root, kNonclientAreaId);
 
   event_dispatcher()->Reset();
   EXPECT_FALSE(test_event_dispatcher_delegate()->has_queued_events());
   EXPECT_EQ(nullptr, event_dispatcher()->capture_window());
 }
 
 // Tests that events on a modal parent target the modal child.
-TEST_F(EventDispatcherTest, ModalWindowEventOnModalParent) {
+TEST_P(EventDispatcherTest, ModalWindowEventOnModalParent) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> w2 = CreateChildWindow(WindowId(1, 5));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->SetBounds(gfx::Rect(10, 10, 30, 30));
   w2->SetBounds(gfx::Rect(50, 10, 10, 10));
 
   w1->AddTransientWindow(w2.get());
   w2->SetModalType(MODAL_TYPE_WINDOW);
 
   // Send event that is over |w1|.
   const ui::PointerEvent mouse_pressed(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(15, 15), gfx::Point(15, 15),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(mouse_pressed, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   std::unique_ptr<DispatchedEventDetails> details =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   EXPECT_EQ(w2.get(), details->window);
   EXPECT_TRUE(details->IsNonclientArea());
 
   ASSERT_TRUE(details->event);
   ASSERT_TRUE(details->event->IsPointerEvent());
 
   ui::PointerEvent* dispatched_event = details->event->AsPointerEvent();
   EXPECT_EQ(gfx::Point(15, 15), dispatched_event->root_location());
   EXPECT_EQ(gfx::Point(-35, 5), dispatched_event->location());
 }
 
 // Tests that events on a modal child target the modal child itself.
-TEST_F(EventDispatcherTest, ModalWindowEventOnModalChild) {
+TEST_P(EventDispatcherTest, ModalWindowEventOnModalChild) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> w2 = CreateChildWindow(WindowId(1, 5));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->SetBounds(gfx::Rect(10, 10, 30, 30));
   w2->SetBounds(gfx::Rect(50, 10, 10, 10));
 
   w1->AddTransientWindow(w2.get());
   w2->SetModalType(MODAL_TYPE_WINDOW);
 
   // Send event that is over |w2|.
   const ui::PointerEvent mouse_pressed(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(55, 15), gfx::Point(55, 15),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(mouse_pressed, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   std::unique_ptr<DispatchedEventDetails> details =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   EXPECT_EQ(w2.get(), details->window);
   EXPECT_TRUE(details->IsClientArea());
 
   ASSERT_TRUE(details->event);
   ASSERT_TRUE(details->event->IsPointerEvent());
 
   ui::PointerEvent* dispatched_event = details->event->AsPointerEvent();
   EXPECT_EQ(gfx::Point(55, 15), dispatched_event->root_location());
   EXPECT_EQ(gfx::Point(5, 5), dispatched_event->location());
 }
 
 // Tests that events on an unrelated window are not affected by the modal
 // window.
-TEST_F(EventDispatcherTest, ModalWindowEventOnUnrelatedWindow) {
+TEST_P(EventDispatcherTest, ModalWindowEventOnUnrelatedWindow) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> w2 = CreateChildWindow(WindowId(1, 5));
   std::unique_ptr<ServerWindow> w3 = CreateChildWindow(WindowId(1, 6));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->SetBounds(gfx::Rect(10, 10, 30, 30));
   w2->SetBounds(gfx::Rect(50, 10, 10, 10));
   w3->SetBounds(gfx::Rect(70, 10, 10, 10));
 
   w1->AddTransientWindow(w2.get());
   w2->SetModalType(MODAL_TYPE_WINDOW);
 
   // Send event that is over |w3|.
   const ui::PointerEvent mouse_pressed(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(75, 15), gfx::Point(75, 15),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(mouse_pressed, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   std::unique_ptr<DispatchedEventDetails> details =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   EXPECT_EQ(w3.get(), details->window);
   EXPECT_TRUE(details->IsClientArea());
 
   ASSERT_TRUE(details->event);
   ASSERT_TRUE(details->event->IsPointerEvent());
 
   ui::PointerEvent* dispatched_event = details->event->AsPointerEvent();
   EXPECT_EQ(gfx::Point(75, 15), dispatched_event->root_location());
   EXPECT_EQ(gfx::Point(5, 5), dispatched_event->location());
 }
 
 // Tests that events events on a descendant of a modal parent target the modal
 // child.
-TEST_F(EventDispatcherTest, ModalWindowEventOnDescendantOfModalParent) {
+TEST_P(EventDispatcherTest, ModalWindowEventOnDescendantOfModalParent) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> w11 =
       CreateChildWindowWithParent(WindowId(1, 4), w1.get());
   std::unique_ptr<ServerWindow> w2 = CreateChildWindow(WindowId(1, 5));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->SetBounds(gfx::Rect(10, 10, 30, 30));
   w11->SetBounds(gfx::Rect(10, 10, 10, 10));
   w2->SetBounds(gfx::Rect(50, 10, 10, 10));
 
   w1->AddTransientWindow(w2.get());
   w2->SetModalType(MODAL_TYPE_WINDOW);
 
   // Send event that is over |w11|.
   const ui::PointerEvent mouse_pressed(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(25, 25), gfx::Point(25, 25),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(mouse_pressed, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   std::unique_ptr<DispatchedEventDetails> details =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   EXPECT_EQ(w2.get(), details->window);
   EXPECT_TRUE(details->IsNonclientArea());
 
   ASSERT_TRUE(details->event);
   ASSERT_TRUE(details->event->IsPointerEvent());
 
   ui::PointerEvent* dispatched_event = details->event->AsPointerEvent();
   EXPECT_EQ(gfx::Point(25, 25), dispatched_event->root_location());
   EXPECT_EQ(gfx::Point(-25, 15), dispatched_event->location());
 }
 
 // Tests that events on a system modal window target the modal window itself.
-TEST_F(EventDispatcherTest, ModalWindowEventOnSystemModal) {
+TEST_P(EventDispatcherTest, ModalWindowEventOnSystemModal) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->SetBounds(gfx::Rect(10, 10, 30, 30));
   w1->SetModalType(MODAL_TYPE_SYSTEM);
 
   // Send event that is over |w1|.
   const ui::PointerEvent mouse_pressed(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(15, 15), gfx::Point(15, 15),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(mouse_pressed, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   std::unique_ptr<DispatchedEventDetails> details =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   EXPECT_EQ(w1.get(), details->window);
   EXPECT_TRUE(details->IsClientArea());
 
   ASSERT_TRUE(details->event);
   ASSERT_TRUE(details->event->IsPointerEvent());
 
   ui::PointerEvent* dispatched_event = details->event->AsPointerEvent();
   EXPECT_EQ(gfx::Point(15, 15), dispatched_event->root_location());
   EXPECT_EQ(gfx::Point(5, 5), dispatched_event->location());
 }
 
 // Tests that events outside of system modal window target the modal window.
-TEST_F(EventDispatcherTest, ModalWindowEventOutsideSystemModal) {
+TEST_P(EventDispatcherTest, ModalWindowEventOutsideSystemModal) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->SetBounds(gfx::Rect(10, 10, 30, 30));
   w1->SetModalType(MODAL_TYPE_SYSTEM);
   event_dispatcher()->AddSystemModalWindow(w1.get());
 
   // Send event that is over |w1|.
   const ui::PointerEvent mouse_pressed(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(45, 15), gfx::Point(45, 15),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(mouse_pressed, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   std::unique_ptr<DispatchedEventDetails> details =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   EXPECT_EQ(w1.get(), details->window);
   EXPECT_TRUE(details->IsNonclientArea());
 
   ASSERT_TRUE(details->event);
   ASSERT_TRUE(details->event->IsPointerEvent());
 
   ui::PointerEvent* dispatched_event = details->event->AsPointerEvent();
   EXPECT_EQ(gfx::Point(45, 15), dispatched_event->root_location());
   EXPECT_EQ(gfx::Point(35, 5), dispatched_event->location());
 }
 
 // Tests events on a sub-window of system modal window target the window itself.
-TEST_F(EventDispatcherTest, ModalWindowEventSubWindowSystemModal) {
+TEST_P(EventDispatcherTest, ModalWindowEventSubWindowSystemModal) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
   w1->SetModalType(MODAL_TYPE_SYSTEM);
   event_dispatcher()->AddSystemModalWindow(w1.get());
 
   std::unique_ptr<ServerWindow> w2 =
       CreateChildWindowWithParent(WindowId(1, 4), w1.get());
   std::unique_ptr<ServerWindow> w3 = CreateChildWindow(WindowId(1, 5));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->SetBounds(gfx::Rect(10, 10, 30, 30));
@@ skipping 12 matching lines @@
       {gfx::Point(11, 31), w1.get()},
   };
 
   for (size_t i = 0; i < arraysize(kTouchData); i++) {
     // Send touch press and check that the expected target receives it.
     event_dispatcher()->ProcessEvent(
         ui::PointerEvent(ui::TouchEvent(
             ui::ET_TOUCH_PRESSED, kTouchData[i].location, base::TimeTicks(),
             ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 0))),
         0, EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
     std::unique_ptr<DispatchedEventDetails> details =
         test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
     ASSERT_TRUE(details) << " details is nullptr " << i;
     EXPECT_EQ(kTouchData[i].expected_target, details->window) << i;
 
     // Release touch.
     event_dispatcher()->ProcessEvent(
         ui::PointerEvent(ui::TouchEvent(
             ui::ET_TOUCH_RELEASED, kTouchData[i].location, base::TimeTicks(),
             ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 0))),
         0, EventDispatcher::AcceleratorMatchPhase::ANY);
+    RunTasks();
     test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   }
 }
 
 // Tests that setting capture to a descendant of a modal parent fails.
-TEST_F(EventDispatcherTest, ModalWindowSetCaptureDescendantOfModalParent) {
+TEST_P(EventDispatcherTest, ModalWindowSetCaptureDescendantOfModalParent) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> w11 =
       CreateChildWindowWithParent(WindowId(1, 4), w1.get());
   std::unique_ptr<ServerWindow> w2 = CreateChildWindow(WindowId(1, 5));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->SetBounds(gfx::Rect(10, 10, 30, 30));
   w11->SetBounds(gfx::Rect(10, 10, 10, 10));
   w2->SetBounds(gfx::Rect(50, 10, 10, 10));
 
   w1->AddTransientWindow(w2.get());
   w2->SetModalType(MODAL_TYPE_WINDOW);
 
   EXPECT_FALSE(event_dispatcher()->SetCaptureWindow(w11.get(), kClientAreaId));
   EXPECT_EQ(nullptr, event_dispatcher()->capture_window());
 }
 
 // Tests that setting capture to a window unrelated to a modal parent works.
-TEST_F(EventDispatcherTest, ModalWindowSetCaptureUnrelatedWindow) {
+TEST_P(EventDispatcherTest, ModalWindowSetCaptureUnrelatedWindow) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> w2 = CreateChildWindow(WindowId(1, 4));
   std::unique_ptr<ServerWindow> w3 = CreateChildWindow(WindowId(1, 5));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->SetBounds(gfx::Rect(10, 10, 30, 30));
   w2->SetBounds(gfx::Rect(50, 10, 10, 10));
   w3->SetBounds(gfx::Rect(70, 10, 10, 10));
 
   w1->AddTransientWindow(w2.get());
   w2->SetModalType(MODAL_TYPE_WINDOW);
 
   EXPECT_TRUE(event_dispatcher()->SetCaptureWindow(w3.get(), kClientAreaId));
   EXPECT_EQ(w3.get(), event_dispatcher()->capture_window());
 }
 
 // Tests that setting capture fails when there is a system modal window.
-TEST_F(EventDispatcherTest, ModalWindowSystemSetCapture) {
+TEST_P(EventDispatcherTest, ModalWindowSystemSetCapture) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> w2 = CreateChildWindow(WindowId(1, 4));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->SetBounds(gfx::Rect(10, 10, 30, 30));
   w2->SetBounds(gfx::Rect(50, 10, 10, 10));
 
   event_dispatcher()->AddSystemModalWindow(w2.get());
 
   EXPECT_FALSE(event_dispatcher()->SetCaptureWindow(w1.get(), kClientAreaId));
   EXPECT_EQ(nullptr, event_dispatcher()->capture_window());
 }
 
 // Tests having multiple system modal windows.
-TEST_F(EventDispatcherTest, ModalWindowMultipleSystemModals) {
+TEST_P(EventDispatcherTest, ModalWindowMultipleSystemModals) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> w2 = CreateChildWindow(WindowId(1, 4));
   std::unique_ptr<ServerWindow> w3 = CreateChildWindow(WindowId(1, 5));
 
   w2->SetVisible(false);
 
   // In the beginning, there should be no active system modal window.
   EXPECT_EQ(nullptr, GetActiveSystemModalWindow());
 
   // Add a visible system modal window. It should become the active one.
@@ skipping 21 matching lines @@
   // one.
   w1.reset();
   EXPECT_EQ(w3.get(), GetActiveSystemModalWindow());
 
   // Remove the last remaining system modal window. There should be no active
   // one anymore.
   w3.reset();
   EXPECT_EQ(nullptr, GetActiveSystemModalWindow());
 }
 
-TEST_F(EventDispatcherTest, CaptureNotResetOnParentChange) {
+TEST_P(EventDispatcherTest, CaptureNotResetOnParentChange) {
   std::unique_ptr<ServerWindow> w1 = CreateChildWindow(WindowId(1, 3));
   w1->set_event_targeting_policy(mojom::EventTargetingPolicy::DESCENDANTS_ONLY);
   std::unique_ptr<ServerWindow> w11 =
       CreateChildWindowWithParent(WindowId(1, 4), w1.get());
   std::unique_ptr<ServerWindow> w2 = CreateChildWindow(WindowId(1, 5));
   w2->set_event_targeting_policy(mojom::EventTargetingPolicy::DESCENDANTS_ONLY);
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   w1->SetBounds(gfx::Rect(0, 0, 100, 100));
   w11->SetBounds(gfx::Rect(10, 10, 10, 10));
   w2->SetBounds(gfx::Rect(0, 0, 100, 100));
 
   // Send event that is over |w11|.
   const ui::PointerEvent mouse_pressed(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(15, 15), gfx::Point(15, 15),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(mouse_pressed, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
   event_dispatcher()->SetCaptureWindow(w11.get(), kClientAreaId);
+  RunTasks();
 
   std::unique_ptr<DispatchedEventDetails> details =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   EXPECT_EQ(w11.get(), details->window);
   EXPECT_TRUE(details->IsClientArea());
 
   // Move |w11| to |w2| and verify the mouse is still down, and |w11| has
   // capture.
   w2->Add(w11.get());
   EXPECT_TRUE(IsMouseButtonDown());
   EXPECT_EQ(w11.get(),
             EventDispatcherTestApi(event_dispatcher()).capture_window());
 }
 
-TEST_F(EventDispatcherTest, ChangeCaptureFromClientToNonclient) {
+TEST_P(EventDispatcherTest, ChangeCaptureFromClientToNonclient) {
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
   event_dispatcher()->SetCaptureWindow(child.get(), kNonclientAreaId);
   EXPECT_EQ(kNonclientAreaId,
             event_dispatcher()->capture_window_client_id());
   EXPECT_EQ(nullptr, test_event_dispatcher_delegate()->lost_capture_window());
   event_dispatcher()->SetCaptureWindow(child.get(), kClientAreaId);
   // Changing capture from client to non-client should notify the delegate.
   // The delegate can decide if it really wants to forward the event or not.
   EXPECT_EQ(child.get(),
             test_event_dispatcher_delegate()->lost_capture_window());
   EXPECT_EQ(child.get(), event_dispatcher()->capture_window());
   EXPECT_EQ(kClientAreaId, event_dispatcher()->capture_window_client_id());
 }
 
-TEST_F(EventDispatcherTest, MoveMouseFromNoTargetToValidTarget) {
+TEST_P(EventDispatcherTest, MoveMouseFromNoTargetToValidTarget) {
   ServerWindow* root = root_window();
   root->set_event_targeting_policy(
       mojom::EventTargetingPolicy::DESCENDANTS_ONLY);
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   MouseEventTest tests[] = {
       // Send a mouse down over the root, but not the child. No event should
       // be generated.
       {ui::MouseEvent(ui::ET_MOUSE_MOVED, gfx::Point(5, 5), gfx::Point(5, 5),
                       base::TimeTicks(), 0, 0),
        nullptr, gfx::Point(), gfx::Point(), nullptr, gfx::Point(),
        gfx::Point()},
 
       // Move into child.
       {ui::MouseEvent(ui::ET_MOUSE_MOVED, gfx::Point(12, 12),
                       gfx::Point(12, 12), base::TimeTicks(), 0, 0),
        child.get(), gfx::Point(12, 12), gfx::Point(2, 2), nullptr, gfx::Point(),
        gfx::Point()}};
   RunMouseEventTests(event_dispatcher(), test_event_dispatcher_delegate(),
                      tests, arraysize(tests));
 }
 
-TEST_F(EventDispatcherTest, NoTargetToTargetWithMouseDown) {
+TEST_P(EventDispatcherTest, NoTargetToTargetWithMouseDown) {
   ServerWindow* root = root_window();
   root->set_event_targeting_policy(
       mojom::EventTargetingPolicy::DESCENDANTS_ONLY);
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   root->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   MouseEventTest tests[] = {
       // Mouse over the root, but not the child. No event should be generated.
@@ skipping 12 matching lines @@
       // Move into child, still no target.
       {ui::MouseEvent(ui::ET_MOUSE_MOVED, gfx::Point(12, 12),
                       gfx::Point(12, 12), base::TimeTicks(),
                       ui::EF_LEFT_MOUSE_BUTTON, 0),
        nullptr, gfx::Point(), gfx::Point(), nullptr, gfx::Point(),
        gfx::Point()}};
   RunMouseEventTests(event_dispatcher(), test_event_dispatcher_delegate(),
                      tests, arraysize(tests));
 }
 
-TEST_F(EventDispatcherTest, DontSendExitToSameClientWhenCaptureChanges) {
+TEST_P(EventDispatcherTest, DontSendExitToSameClientWhenCaptureChanges) {
   ServerWindow* root = root_window();
   root->set_event_targeting_policy(
       mojom::EventTargetingPolicy::DESCENDANTS_ONLY);
   std::unique_ptr<ServerWindow> c1 = CreateChildWindow(WindowId(1, 3));
   std::unique_ptr<ServerWindow> c2 = CreateChildWindow(WindowId(1, 4));
 
   root->SetBounds(gfx::Rect(0, 0, 100, 100));
   c1->SetBounds(gfx::Rect(10, 10, 20, 20));
   c2->SetBounds(gfx::Rect(15, 15, 20, 20));
 
@@ skipping 12 matching lines @@
        gfx::Point()}};
   RunMouseEventTests(event_dispatcher(), test_event_dispatcher_delegate(),
                      tests, arraysize(tests));
 
   // Set capture on |c1|. No events should be sent as |c1| is in the same
   // client.
   event_dispatcher()->SetCaptureWindow(c1.get(), kClientAreaId);
   EXPECT_FALSE(test_event_dispatcher_delegate()->has_queued_events());
 }
 
-TEST_F(EventDispatcherTest, MousePointerClearedOnDestroy) {
+TEST_P(EventDispatcherTest, MousePointerClearedOnDestroy) {
   root_window()->set_event_targeting_policy(
       mojom::EventTargetingPolicy::DESCENDANTS_ONLY);
   std::unique_ptr<ServerWindow> c1 = CreateChildWindow(WindowId(1, 3));
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   c1->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   event_dispatcher()->SetMousePointerDisplayLocation(gfx::Point(15, 15), 0);
+  RunTasks();
   EXPECT_EQ(c1.get(), event_dispatcher()->mouse_cursor_source_window());
   c1.reset();
   EXPECT_EQ(nullptr, event_dispatcher()->mouse_cursor_source_window());
 }
 
-TEST_F(EventDispatcherTest, LocationHonorsTransform) {
+TEST_P(EventDispatcherTest, LocationHonorsTransform) {
   std::unique_ptr<ServerWindow> child = CreateChildWindow(WindowId(1, 3));
 
   gfx::Transform transform;
   transform.Scale(SkIntToMScalar(2), SkIntToMScalar(2));
   child->SetTransform(transform);
 
   root_window()->SetBounds(gfx::Rect(0, 0, 100, 100));
   child->SetBounds(gfx::Rect(10, 10, 20, 20));
 
   // Send event that is over child.
   const ui::PointerEvent ui_event(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, gfx::Point(20, 25), gfx::Point(20, 25),
       base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
   event_dispatcher()->ProcessEvent(ui_event, 0,
                                    EventDispatcher::AcceleratorMatchPhase::ANY);
+  RunTasks();
 
   std::unique_ptr<DispatchedEventDetails> details =
       test_event_dispatcher_delegate()->GetAndAdvanceDispatchedEventDetails();
   ASSERT_TRUE(details);
   ASSERT_EQ(child.get(), details->window);
 
   ASSERT_TRUE(details->event);
   ASSERT_TRUE(details->event->IsPointerEvent());
 
   ui::PointerEvent* dispatched_event = details->event->AsPointerEvent();
   EXPECT_EQ(gfx::Point(20, 25), dispatched_event->root_location());
   EXPECT_EQ(gfx::Point(5, 7), dispatched_event->location());
 }
 
+INSTANTIATE_TEST_CASE_P(/* no prefix */, EventDispatcherTest, testing::Bool());
+
 }  // namespace test
 }  // namespace ws
 }  // namespace ui