Blob/File constructors/slice method shouldn't throw on invalid types

third_party/WebKit/LayoutTests/fast/files/blob-slice-type.html

Index: third_party/WebKit/LayoutTests/fast/files/blob-slice-type.html
diff --git a/third_party/WebKit/LayoutTests/fast/files/blob-slice-type.html b/third_party/WebKit/LayoutTests/fast/files/blob-slice-type.html
index 912c9f1707ad0657b68ba1c0f348b09b0b4f8bd6..b981861dd1ceec1a13a2cff17ebe7d1c8387980d 100644
--- a/third_party/WebKit/LayoutTests/fast/files/blob-slice-type.html
+++ b/third_party/WebKit/LayoutTests/fast/files/blob-slice-type.html
@@ -12,6 +12,15 @@ test(function() {
 }, 'Blob.slice() with type argument as undefined.');
 
 test(function() {
+  assert_equals(new Blob().slice(0, 0, 'hello\u0100').type, "");
+}, 'Blob.slice() with non-ASCII type.');
+
+test(function() {
+  assert_equals(new Blob().slice(0, 0, 'hello\u001F').type, "");
+  assert_equals(new Blob().slice(0, 0, 'hello\u00FF').type, "");
+}, 'Blob.slice() with non-printable-ASCII type.');
+
+test(function() {
   assert_equals(new Blob().slice(0, 0).type, "");
 }, 'Blob.slice() with no type argument passed.');
 </script>