Add webusb notification UI code

chrome/browser/chrome_webusb_browser_client.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 "chrome/browser/chrome_webusb_browser_client.h"
+
+#include "base/command_line.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/net/referrer.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/host_desktop.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/grit/generated_resources.h"
+#include "grit/theme_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/page_transition_types.h"
+#include "ui/base/window_open_disposition.h"
+#include "ui/message_center/message_center.h"
+#include "ui/message_center/notification.h"
+#include "ui/message_center/notification_delegate.h"
+#include "url/gurl.h"
+
+namespace {
+
+const char kWebUsbDetectorNotificationID[] = "webusb.detector";
+
+// Delegate for webusb notification
+class WebUsbNotificationDelegate : public message_center::NotificationDelegate {
+ public:
+  WebUsbNotificationDelegate(Profile* profile,
+                             const GURL& landing_page,
+                             const std::string& notification_id)
+      : profile_(profile),
+        landing_page_(landing_page),
+        notification_id_(notification_id) {}
+
+  void Click() override {
+    webusb::WebUsbBrowserClient::Get()->OpenURL(profile_, landing_page_);
+    message_center::MessageCenter::Get()->RemoveNotification(
+        notification_id_, false /* by_user */);
+  }
+
+ private:
+  ~WebUsbNotificationDelegate() override = default;
+
+  Profile* profile_;
+  GURL landing_page_;
+  std::string notification_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebUsbNotificationDelegate);
+};
+
+}  // namespace
+
+ChromeWebUsbBrowserClient::ChromeWebUsbBrowserClient() {}
+
+ChromeWebUsbBrowserClient::~ChromeWebUsbBrowserClient() {}
+
+void ChromeWebUsbBrowserClient::OnDeviceAdded(

[Reilly Grant (use Gerrit), 2015/08/18 00:23:43]

Can you move OnDeviceAdded and OnDeviceRemoved into webusb_detector.cc because
they don't depend on Chrome?

[juncai, 2015/08/18 17:39:59]

Done.

+    Profile* profile,
+    const char* product_name,
+    const GURL& landing_page,
+    const std::string& notification_id) {
+  scoped_ptr<message_center::Notification> notification;
+
+  message_center::RichNotificationData rich_notification_data;
+  rich_notification_data.context_message =
+      base::UTF8ToUTF16(landing_page.GetContent());
+
+  notification.reset(new message_center::Notification(
+      message_center::NOTIFICATION_TYPE_SIMPLE, notification_id,
+      l10n_util::GetStringFUTF16(IDS_WEBUSB_DEVICE_DETECTED_NOTIFICATION_TITLE,
+                                 base::UTF8ToUTF16(product_name)),
+      l10n_util::GetStringUTF16(IDS_WEBUSB_DEVICE_DETECTED_NOTIFICATION),
+      // TODO(juncai): use generic USB device icon here.
+      gfx::Image(), base::string16(),
+      message_center::NotifierId(message_center::NotifierId::SYSTEM_COMPONENT,
+                                 kWebUsbDetectorNotificationID),
+      rich_notification_data,
+      new WebUsbNotificationDelegate(profile, landing_page, notification_id)));
+
+  notification->SetSystemPriority();
+  message_center::MessageCenter::Get()->AddNotification(notification.Pass());
+}
+
+void ChromeWebUsbBrowserClient::OnDeviceRemoved(
+    const std::string& notification_id) {
+  message_center::MessageCenter* message_center =
+      message_center::MessageCenter::Get();
+  if (message_center->FindVisibleNotificationById(notification_id)) {
+    message_center->RemoveNotification(notification_id, false /* by_user */);
+  }
+}
+
+void ChromeWebUsbBrowserClient::OpenURL(Profile* profile, const GURL& url) {
+  Browser* browser =
+      chrome::FindBrowserWithProfile(profile, chrome::HOST_DESKTOP_TYPE_NATIVE);
+  content::OpenURLParams params(url, content::Referrer(), NEW_FOREGROUND_TAB,
+                                ui::PAGE_TRANSITION_AUTO_TOPLEVEL, true);
+  browser->OpenURL(params);
+}
+
+bool ChromeWebUsbBrowserClient::WebUsbNotificationEnabled() {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableWebUsbNotification);
+}