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

third_party/WebKit/LayoutTests/fast/files/blob-constructor.html

Index: third_party/WebKit/LayoutTests/fast/files/blob-constructor.html
diff --git a/third_party/WebKit/LayoutTests/fast/files/blob-constructor.html b/third_party/WebKit/LayoutTests/fast/files/blob-constructor.html
index f8a266cb0756eee57e8732d3b80bbb5260b01495..5261d19ff472233378cc26b2fdd4c7469f3729df 100644
--- a/third_party/WebKit/LayoutTests/fast/files/blob-constructor.html
+++ b/third_party/WebKit/LayoutTests/fast/files/blob-constructor.html
@@ -50,7 +50,6 @@ shouldBeTrue("(new Blob([], {unknownKey:'value'})) instanceof window.Blob");
 shouldThrow("new Blob([], {endings:'illegalValue'})", "'TypeError: Failed to construct \\'Blob\\': The provided value \\'illegalValue\\' is not a valid enum value of type NormalizeLineEndings.'");
 shouldThrow("new Blob([], {endings:throwingObj})", "'Error'");
 shouldThrow("new Blob([], {type:throwingObj})", "'Error'");
-shouldThrow("new Blob([], {type:'hello\u00EE'})", "'SyntaxError: Failed to construct \\'Blob\\': The \\'type\\' property must consist of ASCII characters.'");
 
 // Test that order of property bag evaluation is lexigraphical
 var throwingObj1 = { toString: function() { throw "Error 1"; } };
@@ -59,6 +58,19 @@ shouldThrow("new Blob([], {endings:throwingObj1, type:throwingObj2})", "'Error 1
 shouldThrow("new Blob([], {type:throwingObj2, endings:throwingObj1})", "'Error 1'");
 shouldThrow("new Blob([], {type:throwingObj2, endings:'illegal'})", "'TypeError: Failed to construct \\'Blob\\': The provided value \\'illegal\\' is not a valid enum value of type NormalizeLineEndings.'");
 
+// Test non-ASCII type handling
+shouldBeEqualToString("new Blob([], {type:'hello\\u00EE'}).type", "");
+
+// Test non-printable-ASCII type handling
+shouldBeEqualToString("new Blob([], {type:'hello\\u001F'}).type", "");
+shouldBeEqualToString("new Blob([], {type:'hello\\u007F'}).type", "");
+
+// Test lowercasing of type
+shouldBeEqualToString("new Blob([], {type:'ABC/abc'}).type", "abc/abc");
+
+// Test non-parsable type
+shouldBeEqualToString("new Blob([], {type:'123ABCabc'}).type", "123abcabc");
+
 // Test various non-object literals being used as property bags.
 shouldBeTrue("(new Blob([], null)) instanceof window.Blob");
 shouldBeTrue("(new Blob([], undefined)) instanceof window.Blob");