New extension system: Add ProfileName* classes.

core/lib/Drupal/Core/Extension/ProfileName/ProfileNameInterface.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace Drupal\Core\Extension\ProfileName;
+
+interface ProfileNameInterface {
+
+  /**
+   * @return string|null
+   */
+  public function getProfileName();
+
+}

core/lib/Drupal/Core/Extension/ProfileName/ProfileName_DrupalGetProfile.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Drupal\Core\Extension\ProfileName;
+
+class ProfileName_DrupalGetProfile implements ProfileNameInterface {
+
+  /**
+   * @return string|null
+   */
+  public function getProfileName() {
+    return drupal_get_profile() ?: NULL;
+  }
+}

core/lib/Drupal/Core/Extension/ProfileName/ProfileName_Static.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Drupal\Core\Extension\ProfileName;
+
+class ProfileName_Static implements ProfileNameInterface {
+
+  /**
+   * @var string
+   */
+  private $profileName;
+
+  /**
+   * @param string $profileName
+   */
+  public function __construct($profileName) {
+    $this->profileName = $profileName;
+  }
+
+  /**
+   * @return string|null
+   */
+  public function getProfileName() {
+    return $this->profileName;
+  }
+}