Add ShouldDisplayOverFullscreen support to web notifications.

chrome/browser/notifications/web_notification_delegate.cc

+// Copyright 2016 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 "chrome/browser/notifications/web_notification_delegate.h"
+
+#include "chrome/browser/notifications/notification_common.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/exclusive_access/exclusive_access_context.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "content/public/browser/web_contents.h"
+
+WebNotificationDelegate::WebNotificationDelegate(
+    content::BrowserContext* browser_context,
+    const std::string& notification_id,
+    const GURL& origin)
+    : browser_context_(browser_context),
+      notification_id_(notification_id),
+      origin_(origin) {}
+
+WebNotificationDelegate::~WebNotificationDelegate() {}
+
+std::string WebNotificationDelegate::id() const {
+  return notification_id_;
+}
+
+void WebNotificationDelegate::SettingsClick() {
+  NotificationCommon::OpenNotificationSettings(browser_context_);
+}
+
+bool WebNotificationDelegate::ShouldDisplaySettingsButton() {
+  return true;
+}
+
+bool WebNotificationDelegate::ShouldDisplayOverFullscreen() const {
+#if !defined(OS_ANDROID)

[dewittj, 2016/09/28 20:01:54]

This is probably fine for now, but eventually we'll need to test on Windows and
Mac versions as well, once we move to native NC for some versions of those
platforms.

[bmalcolm, 2016/09/29 20:53:14]

Acknowledged.

+  Profile* profile = Profile::FromBrowserContext(browser_context_);
+  DCHECK(profile);
+  // Check to see if this notification comes from a webpage that is displaying
+  // fullscreen content.
+  for (auto* browser : *BrowserList::GetInstance()) {
+    // Only consider the browsers for the profile that created the notification
+    if (browser->profile() != profile)
+      continue;
+
+    const content::WebContents* active_contents =
+        browser->tab_strip_model()->GetActiveWebContents();
+    if (!active_contents)
+      continue;
+
+    // Check to see if
+    //  (a) the active tab in the browser shares its origin with the
+    //      notification.
+    //  (b) the browser is fullscreen
+    //  (c) the browser has focus.
+    if (active_contents->GetURL().GetOrigin() == origin_ &&
+        browser->exclusive_access_manager()->context()->IsFullscreen() &&
+        browser->window()->IsActive()) {
+      return true;
+    }
+  }
+#endif
+
+  return false;
+}