Bug 760749. Make interface type constructor args work in WebIDL bindings. r=khuey

dom/bindings/parser/WebIDL.py

@@ -460,6 +460,10 @@ class IDLInterface(IDLObjectWithScope):
         for member in self.members:
             member.finish(scope)
 
+        ctor = self.ctor()
+        if ctor is not None:
+            ctor.finish(scope)
+
     def isInterface(self):
         return True
 

dom/bindings/test/TestBindingHeader.h

@@ -64,6 +64,13 @@ public:
   static
   already_AddRefed<TestInterface> Constructor(nsISupports*, uint32_t,
                                               Nullable<bool>&, ErrorResult&);
+  static
+  already_AddRefed<TestInterface> Constructor(nsISupports*, TestInterface*,
+                                              ErrorResult&);
+  static
+  already_AddRefed<TestInterface> Constructor(nsISupports*,
+                                              NonNull<TestNonCastableInterface>&,
+                                              ErrorResult&);
 
   // Integer types
   int8_t GetReadonlyByte(ErrorResult&);

dom/bindings/test/TestCodeGen.webidl

@@ -18,7 +18,9 @@ callback TestCallback = void();
 
 [Constructor,
  Constructor(DOMString str),
- Constructor(unsigned long num, boolean? bool)]
+ Constructor(unsigned long num, boolean? bool),
+ Constructor(TestInterface? iface),
+ Constructor(TestNonCastableInterface iface)]
 interface TestInterface {
   // Integer types
   // XXXbz add tests for infallible versions of all the integer stuff