Update component task, make components extend Component instead of Ob…

…ject.

lib/Cake/Console/Command/UpgradeShell.php

@@ -421,6 +421,29 @@ public function constants() {
 		$this->_filesRegexpUpdate($patterns);
 	}
 
+/**
+ * Update components.
+ *
+ * - Make components that extend Object to extend Component.
+ *
+ * @return void
+ */
+	public function components() {
+		$this->_paths = App::Path('Controller/Component');
+		if (!empty($this->params['plugin'])) {
+			$this->_paths = App::Path('Controller/Component', $this->params['plugin']);
+		}
+		$patterns = array(
+			array(
+				'*Component extents Object to *Component extends Component',
+				'/([a-zA-Z]*Component extends) Object/',
+				'\1 Component'
+			),
+		);
+
+		$this->_filesRegexpUpdate($patterns);
+	}
+
 /**
  * Move application php files to where they now should be
  *
@@ -636,6 +659,10 @@ public function getOptionParser() {
 			->addSubcommand('constants', array(
 				'help' => "Replace Obsolete constants",
 				'parser' => $subcommandParser
+			))
+			->addSubcommand('components', array(
+				'help' => 'Update components to extend Component class.',
+				'parser' => $subcommandParser
 			));
 	}
 }