bindings: Add support for the record<K,V> WebIDL type.

third_party/WebKit/Source/bindings/tests/idls/core/TestTypedefs.idl

Index: third_party/WebKit/Source/bindings/tests/idls/core/TestTypedefs.idl
diff --git a/third_party/WebKit/Source/bindings/tests/idls/core/TestTypedefs.idl b/third_party/WebKit/Source/bindings/tests/idls/core/TestTypedefs.idl
index 9f3006e0d36538522e1d99fafb464f70d2d2655c..aa57e1b4f9734f13acecb1c6a3f78ecb0b9ba5eb 100644
--- a/third_party/WebKit/Source/bindings/tests/idls/core/TestTypedefs.idl
+++ b/third_party/WebKit/Source/bindings/tests/idls/core/TestTypedefs.idl
@@ -42,6 +42,9 @@ typedef TestCallbackInterface      TestCallbackInterfaceType;
 typedef TestInterfaceConstructor   T;
 typedef (TestInterface or TestInterfaceEmpty) TestInterfaceOrTestInterfaceEmpty;
 typedef (DOMString or double) DOMStringOrDouble;
+typedef record<ByteString, long>   SomeRecordType;
+typedef record<USVString, TestObject> RecordWithOilpanValueType;
+typedef (sequence<sequence<ByteString>> or record<ByteString, ByteString>) UnionWithRecord;
 
 [
     Constructor(String stringArg),
@@ -61,4 +64,9 @@ typedef (DOMString or double) DOMStringOrDouble;
 
     ArrayOfStrings arrayOfStringsMethodArrayOfStringsArg(ArrayOfStrings arrayOfStringsArg);
     String[] stringArrayMethodStringArrayArg(String[] stringArrayArg);
+
+    void methodTakingRecord(SomeRecordType arg);
+    void methodTakingOilpanValueRecord(RecordWithOilpanValueType arg);
+    double unionWithRecordMethod(UnionWithRecord arg);
+    record<DOMString, boolean> methodThatReturnsRecord();
 };