Fixing problem with edge swipe exiting immersive mode

chrome/browser/ui/views/frame/immersive_mode_controller_ash_unittest.cc

Index: chrome/browser/ui/views/frame/immersive_mode_controller_ash_unittest.cc
diff --git a/chrome/browser/ui/views/frame/immersive_mode_controller_ash_unittest.cc b/chrome/browser/ui/views/frame/immersive_mode_controller_ash_unittest.cc
index 3b5ee7c4c5240f2cccb0c283fb3f6621e7ecb155..c76b8afcfa3a0841c2b1d7762f733713120a3462 100644
--- a/chrome/browser/ui/views/frame/immersive_mode_controller_ash_unittest.cc
+++ b/chrome/browser/ui/views/frame/immersive_mode_controller_ash_unittest.cc
@@ -10,6 +10,7 @@
 #include "ash/shelf/shelf_types.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
+#include "ash/wm/window_state.h"
 #include "base/command_line.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/ui/browser_commands.h"
@@ -262,6 +263,23 @@ TEST_F(ImmersiveModeControllerAshTest, TabAndBrowserFullscreen) {
   EXPECT_TRUE(controller()->ShouldHideTabIndicators());
 }
 
+// Check that the window state gets properly marked for immersive mode.
+TEST_F(ImmersiveModeControllerAshTest, WindowStateImmersiveModeFullscreen) {
+  AddTab(browser(), GURL("about:blank"));
+
+  ash::wm::WindowState* window_state =
+      ash::wm::GetWindowState(browser()->window()->GetNativeWindow());
+
+  EXPECT_FALSE(window_state->immersive_mode());
+  ToggleFullscreen();
+  ASSERT_TRUE(controller()->IsEnabled());
+  EXPECT_TRUE(window_state->immersive_mode());
+
+  ToggleFullscreen();
+  ASSERT_FALSE(controller()->IsEnabled());
+  EXPECT_FALSE(window_state->immersive_mode());
+}
+
 class ImmersiveModeControllerAshTestHostedApp
     : public ImmersiveModeControllerAshTest {
  public: