Add WindowEventDispatcherTest.TouchDownState for Env::is_touch_down().

ui/aura/window_event_dispatcher_unittest.cc

Index: ui/aura/window_event_dispatcher_unittest.cc
diff --git a/ui/aura/window_event_dispatcher_unittest.cc b/ui/aura/window_event_dispatcher_unittest.cc
index b13935272fd4e1a5af37c23f3b60980292fb508e..3d4e153ca6ed61cb3eca7b448e3b23c377f4c875 100644
--- a/ui/aura/window_event_dispatcher_unittest.cc
+++ b/ui/aura/window_event_dispatcher_unittest.cc
@@ -165,6 +165,38 @@ TEST_P(WindowEventDispatcherTest, RepostEvent) {
   EXPECT_TRUE(Env::GetInstance()->is_touch_down());
 }
 
+// Check that we correctly track whether any touch devices are down in response
+// to touch press and release events with two WindowTreeHost.
+TEST_P(WindowEventDispatcherTest, TouchDownState) {
+  std::unique_ptr<WindowTreeHost> second_host(
+      WindowTreeHost::Create(gfx::Rect(20, 30, 100, 50)));
+  second_host->InitHost();
+  second_host->window()->Show();
+
+  ui::TouchEvent touch_pressed_event1(
+      ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), ui::EventTimeForNow(),
+      ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 1));
+  ui::TouchEvent touch_pressed_event2(
+      ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), ui::EventTimeForNow(),
+      ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 2));
+  ui::TouchEvent touch_released_event1(
+      ui::ET_TOUCH_RELEASED, gfx::Point(10, 10), ui::EventTimeForNow(),
+      ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 1));
+  ui::TouchEvent touch_released_event2(
+      ui::ET_TOUCH_RELEASED, gfx::Point(10, 10), ui::EventTimeForNow(),
+      ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, 2));
+
+  EXPECT_FALSE(Env::GetInstance()->is_touch_down());
+  host()->dispatcher()->OnEventFromSource(&touch_pressed_event1);
+  EXPECT_TRUE(Env::GetInstance()->is_touch_down());
+  second_host->dispatcher()->OnEventFromSource(&touch_pressed_event2);
+  EXPECT_TRUE(Env::GetInstance()->is_touch_down());
+  host()->dispatcher()->OnEventFromSource(&touch_released_event1);
+  EXPECT_TRUE(Env::GetInstance()->is_touch_down());
+  second_host->dispatcher()->OnEventFromSource(&touch_released_event2);
+  EXPECT_FALSE(Env::GetInstance()->is_touch_down());
+}
+
 // Check that we correctly track the state of the mouse buttons in response to
 // button press and release events.
 TEST_P(WindowEventDispatcherTest, MouseButtonState) {