Unify variables.

src/Controller/Component/CookieComponent.php

@@ -122,17 +122,17 @@ class CookieComponent extends Component {
 /**
  * Constructor
  *
- * @param ComponentRegistry $collection A ComponentRegistry for this component
+ * @param ComponentRegistry $registry A ComponentRegistry for this component
  * @param array $config Array of config.
  */
-	public function __construct(ComponentRegistry $collection, array $config = array()) {
-		parent::__construct($collection, $config);
+	public function __construct(ComponentRegistry $registry, array $config = array()) {
+		parent::__construct($registry, $config);
 
 		if (!$this->_config['key']) {
 			$this->config('key', Security::salt());
 		}
 
-		$controller = $collection->getController();
+		$controller = $registry->getController();
 		if ($controller && isset($controller->request)) {
 			$this->_request = $controller->request;
 		} else {

src/Controller/Component/FlashComponent.php

@@ -47,12 +47,12 @@ class FlashComponent extends Component {
 /**
  * Constructor
  *
- * @param ComponentRegistry $collection A ComponentRegistry for this component
+ * @param ComponentRegistry $registry A ComponentRegistry for this component
  * @param array $config Array of config.
  */
-	public function __construct(ComponentRegistry $collection, array $config = []) {
-		parent::__construct($collection, $config);
-		$this->_session = $collection->getController()->request->session();
+	public function __construct(ComponentRegistry $registry, array $config = []) {
+		parent::__construct($registry, $config);
+		$this->_session = $registry->getController()->request->session();
 	}
 
 /**

src/Controller/Component/RequestHandlerComponent.php

@@ -114,14 +114,14 @@ class RequestHandlerComponent extends Component {
 /**
  * Constructor. Parses the accepted content types accepted by the client using HTTP_ACCEPT
  *
- * @param ComponentRegistry $collection ComponentRegistry object.
+ * @param ComponentRegistry $registry ComponentRegistry object.
  * @param array $config Array of config.
  */
-	public function __construct(ComponentRegistry $collection, array $config = array()) {
-		parent::__construct($collection, $config);
+	public function __construct(ComponentRegistry $registry, array $config = array()) {
+		parent::__construct($registry, $config);
 		$this->addInputType('xml', array(array($this, 'convertXml')));
 
-		$Controller = $collection->getController();
+		$Controller = $registry->getController();
 		$this->request = $Controller->request;
 		$this->response = $Controller->response;
 	}

src/Controller/Component/SessionComponent.php

@@ -40,12 +40,12 @@ class SessionComponent extends Component {
 /**
  * Constructor. Parses the accepted content types accepted by the client using HTTP_ACCEPT
  *
- * @param ComponentRegistry $collection ComponentRegistry object.
+ * @param ComponentRegistry $registry ComponentRegistry object.
  * @param array $config Array of config.
  */
-	public function __construct(ComponentRegistry $collection, array $config = array()) {
-		parent::__construct($collection, $config);
-		$this->_session = $collection->getController()->request->session();
+	public function __construct(ComponentRegistry $registry, array $config = array()) {
+		parent::__construct($registry, $config);
+		$this->_session = $registry->getController()->request->session();
 	}
 
 /**