When navigation focuses a web contents, also activate its window.

chrome/browser/notifications/notification_interactive_uitest_mac.mm

+// Copyright (c) 2017 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.
+
+#import <AppKit/AppKit.h>
+
+#include "base/run_loop.h"
+#include "chrome/browser/notifications/notification_test_util.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/test/base/interactive_test_utils.h"
+#include "chrome/test/base/ui_test_utils.h"
+#import "ui/base/test/windowed_nsnotification_observer.h"
+#include "ui/message_center/message_center.h"
+
+// Verify that Chrome becomes the active app when clicking a notification opens
+// a new window.
+IN_PROC_BROWSER_TEST_F(NotificationsTest, TestPopupShouldActivateApp) {
+  EXPECT_TRUE(embedded_test_server()->Start());
+
+  // Creates a simple notification.
+  AllowAllOrigins();
+  ui_test_utils::NavigateToURL(browser(), GetTestPageURL());
+
+  EXPECT_TRUE(ui_test_utils::ShowAndFocusNativeWindow(
+      browser()->window()->GetNativeWindow()));
+
+  {
+    base::scoped_nsobject<WindowedNSNotificationObserver> observer(
+        [[WindowedNSNotificationObserver alloc]
+            initForNotification:NSApplicationDidResignActiveNotification
+                         object:NSApp]);
+    [NSApp hide:nil];
+    [observer wait];
+  }
+  EXPECT_FALSE([NSApp isActive]);
+
+  std::string result = CreateNotification(
+      browser(), true, "no_such_file.png", "Popup", "", "",
+      "window.open('', '', 'width=100,height=100').focus();");
+  EXPECT_NE("-1", result);
+
+  auto message_center = message_center::MessageCenter::Get();
+  message_center::Notification* notification =
+      *message_center->GetVisibleNotifications().begin();
+  message_center->ClickOnNotification(notification->id());
+
+  {
+    base::scoped_nsobject<WindowedNSNotificationObserver> observer(
+        [[WindowedNSNotificationObserver alloc]
+            initForNotification:NSApplicationDidBecomeActiveNotification
+                         object:NSApp]);
+    [NSApp hide:nil];
+    [observer wait];
+  }
+  EXPECT_TRUE([NSApp isActive]);
+}