Implement the no-argument Blob constructor.

Author: Ms2ger

src/components/script/dom/bindings/codegen/Blob.webidl

@@ -4,11 +4,12 @@
  * You can obtain one at http://mozilla.org/MPL/2.0/.
  *
  * The origin of this IDL file is
- * http://www.w3.org/TR/2012/WD-dom-20120105/
+ * http://dev.w3.org/2006/webapi/FileAPI/
  *
  * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
  * liability, trademark and document use rules apply.
  */
 
+[Constructor]
 interface Blob {
-};
+};

src/components/script/dom/blob.rs

@@ -3,6 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use dom::bindings::utils::{Reflectable, Reflector};
+use dom::bindings::utils::Fallible;
 use dom::bindings::codegen::BlobBinding;
 use dom::window::Window;
 
@@ -33,6 +34,12 @@ impl Blob {
     }
 }
 
+impl Blob {
+    pub fn Constructor(window: @mut Window) -> Fallible<@mut Blob> {
+        Ok(Blob::new(window))
+    }
+}
+
 impl Reflectable for Blob {
     fn reflector<'a>(&'a self) -> &'a Reflector {
         &self.reflector_