Auto merge of #9606 - servo:bump-js, r=Ms2ger

Bump js to get fix from servo/rust-mozjs#237

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components/script/dom/bindings/conversions.rs

@@ -97,11 +97,15 @@ impl<T: Float + FromJSValConvertible<Config=()>> FromJSValConvertible for Finite
 impl <T: Reflectable + IDLInterface> FromJSValConvertible for Root<T> {
     type Config = ();
 
-    unsafe fn from_jsval(_cx: *mut JSContext,
+    unsafe fn from_jsval(cx: *mut JSContext,
                          value: HandleValue,
                          _config: Self::Config)
-        -> Result<Root<T>, ()> {
-        root_from_handlevalue(value)
+                         -> Result<Root<T>, ()> {
+        let result = root_from_handlevalue(value);
+        if let Err(()) = result {
+            throw_type_error(cx, "value is not an object");
+        }
+        result
     }
 }
 
@@ -323,16 +327,24 @@ pub fn root_from_object<T>(obj: *mut JSObject) -> Result<Root<T>, ()>
 }
 
 /// Get a `*const T` for a DOM object accessible from a `HandleValue`.
+/// Caller is responsible for throwing a JS exception if needed in case of error.
 pub fn native_from_handlevalue<T>(v: HandleValue) -> Result<*const T, ()>
     where T: Reflectable + IDLInterface
 {
+    if !v.get().is_object() {
+        return Err(());
+    }
     native_from_object(v.get().to_object())
 }
 
 /// Get a `Root<T>` for a DOM object accessible from a `HandleValue`.
+/// Caller is responsible for throwing a JS exception if needed in case of error.
 pub fn root_from_handlevalue<T>(v: HandleValue) -> Result<Root<T>, ()>
     where T: Reflectable + IDLInterface
 {
+    if !v.get().is_object() {
+        return Err(());
+    }
     root_from_object(v.get().to_object())
 }