Theme Customizer: First pass at using postMessage for background color. Fix instance where preview.targetWindow would become inaccurate. Initialize setting values in customize-preview.js. see #19910.

git-svn-id: http://svn.automattic.com/wordpress/trunk@20123 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-customize.php

@@ -122,7 +122,13 @@ final class WP_Customize {
 		$settings = array(
 			// @todo: Perhaps grab the URL via $_POST?
 			'parent' => esc_url( admin_url( 'themes.php' ) ),
+			'values' => array(),
 		);
+
+		foreach ( $this->settings as $id => $setting ) {
+			$settings['values'][ $id ] = $setting->value();
+		}
+
 		?>
 		<script type="text/javascript">
 			(function() {