Rename CompoundPath#simplify() to #flatten() to avoid clashes with Path#simplify(), and add Path#flatten(), returning itself.

src/path/CompoundPath.js

@@ -69,9 +69,9 @@ var CompoundPath = this.CompoundPath = PathItem.extend(/** @lends CompoundPath#
 	 * the path is moved outside and the compound path is erased.
 	 * Otherwise, the compound path is returned unmodified.
 	 *
-	 * @return {CompoundPath|Path} the simplified compound path
+	 * @return {CompoundPath|Path} the flattened compound path
 	 */
-	simplify: function() {
+	flatten: function() {
 		if (this._children.length == 1) {
 			var child = this._children[0];
 			child.insertAbove(this);

src/path/Path.js

@@ -947,6 +947,14 @@ var Path = this.Path = PathItem.extend(/** @lends Path# */{
 		return false;
 	},
 
+	/**
+	 * For simple paths, flatten always returns the path itself. See
+	 * {@link CompoundPath#flatten()} for more explanations.
+	 */
+	flatten: function() {
+		return this;
+	},
+
 	/**
 	 * The length of the perimeter of the path.
 	 *

src/svg/SvgImporter.js

@@ -317,7 +317,7 @@ var SvgImporter = this.SvgImporter = new function() {
 				break;
 			// http://www.w3.org/TR/SVG/masking.html#ClipPathProperty
 			case 'clip-path':
-				var clipPath = getDefinition(value).clone().simplify(),
+				var clipPath = getDefinition(value).clone().flatten(),
 					group = new Group([clipPath, item]);
 				group.clipped = true;
 				break;