bindings: Throw TypeError when required dictionary member is undefined

LayoutTests/fast/dom/idl-dictionary-unittest.html

Index: LayoutTests/fast/dom/idl-dictionary-unittest.html
diff --git a/LayoutTests/fast/dom/idl-dictionary-unittest.html b/LayoutTests/fast/dom/idl-dictionary-unittest.html
index a31e4945b982104983ef129c81dbfc0322bd27b7..1a989429f67e867ea4a6e32cacb13c1759a6f178 100644
--- a/LayoutTests/fast/dom/idl-dictionary-unittest.html
+++ b/LayoutTests/fast/dom/idl-dictionary-unittest.html
@@ -243,7 +243,7 @@ if (window.internals && internals.dictionaryTest) {
     debug('');
 
     debug('Test for derived dictionary');
-    dictionaryTest.setDerived({});
+    dictionaryTest.setDerived({ requiredBooleanMember: true });
     derived = dictionaryTest.getDerived();
     shouldBeUndefined('derived.longMember');
     shouldBe('derived.longMemberWithDefault', '42');
@@ -264,6 +264,7 @@ if (window.internals && internals.dictionaryTest) {
     shouldBeNull('derived.objectOrNullMemberWithDefault');
     shouldBeUndefined('derived.derivedStringMember');
     shouldBeEqualToString('derived.derivedStringMemberWithDefault', 'derivedDefaultStringValue');
+    shouldBeTrue('derived.requiredBooleanMember');
     debug('');
 
     dictionaryTest.setDerived({
@@ -272,6 +273,7 @@ if (window.internals && internals.dictionaryTest) {
         derivedStringMember: 'modifiedString2',
         derivedStringMemberWithDefault: 'modifiedString3',
         invalidMember: 'shouldNotBeSet',
+        requiredBooleanMember: false,
     });
     derived = dictionaryTest.getDerived();
     shouldBe('derived.longMember', '1');
@@ -279,8 +281,11 @@ if (window.internals && internals.dictionaryTest) {
     shouldBeEqualToString('derived.derivedStringMember', 'modifiedString2');
     shouldBeEqualToString('derived.derivedStringMemberWithDefault', 'modifiedString3');
     shouldBeUndefined('derived.invalidMember');
-
+    shouldBeFalse('derived.requiredBooleanMember');
     debug('');
-    shouldThrow("dictionaryTest.setDerived({objectMember: 42})");
+
+    debug('Test for passing invalid values as derived dictionary');
+    shouldThrow("dictionaryTest.setDerived({objectMember: 42, requiredBooleanMember: false })");
+    shouldThrow("dictionaryTest.setDerived({})"); // Missing required member.
 }
 </script>