Show notification instead of opening app launcher after extension installation

chrome/browser/ui/extensions/extension_installed_notification.h

Index: chrome/browser/ui/extensions/extension_installed_notification.h
diff --git a/chrome/browser/ui/extensions/extension_installed_notification.h b/chrome/browser/ui/extensions/extension_installed_notification.h
new file mode 100644
index 0000000000000000000000000000000000000000..7f5c5539c4f1cfac316de7f4948aa27f8c2aa572
--- /dev/null
+++ b/chrome/browser/ui/extensions/extension_installed_notification.h
@@ -0,0 +1,36 @@
+// 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.
+
+#ifndef CHROME_BROWSER_UI_EXTENSIONS_EXTENSION_INSTALLED_NOTIFICATION_H_
+#define CHROME_BROWSER_UI_EXTENSIONS_EXTENSION_INSTALLED_NOTIFICATION_H_
+
+#include <string>
+
+#include "chrome/browser/notifications/notification_delegate.h"
+#include "chrome/browser/profiles/profile.h"
+#include "extensions/common/extension.h"
+
+class ExtensionInstalledNotification : public NotificationDelegate {
+ public:
+  static void Show(const extensions::Extension* extension, Profile* profile);
+
+  ExtensionInstalledNotification(const extensions::Extension* extension,
+                                 Profile* profile);
+
+  // NotificationDelegate override:
+  void Click() override;
+  std::string id() const override;
+
+ protected:
+  // This class is ref-counted.
+  ~ExtensionInstalledNotification() override;
+
+ private:
+  const std::string extension_id_;
+  Profile* const profile_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionInstalledNotification);
+};
+
+#endif  // CHROME_BROWSER_UI_EXTENSIONS_EXTENSION_INSTALLED_NOTIFICATION_H_