Map v8::Function to JSReceiver + IsCallable

src/execution.h

Index: src/execution.h
diff --git a/src/execution.h b/src/execution.h
index 0b603ee5a9212cf7c20c0883fa110e0551696e1c..42c8140eac2cbf5a3b22fc85dc79608b6a68ea05 100644
--- a/src/execution.h
+++ b/src/execution.h
@@ -47,7 +47,7 @@ class Execution final : public AllStatic {
   // that occurred (if caught exception is true).
   // In the exception case, exception_out holds the caught exceptions, unless
   // it is a termination exception.
-  static MaybeHandle<Object> TryCall(Handle<JSFunction> func,
+  static MaybeHandle<Object> TryCall(Isolate* isolate, Handle<Object> func,

[rossberg, 2015/10/23 10:45:44]

Nit: rename param to `callable`, like above.

                                      Handle<Object> receiver, int argc,
                                      Handle<Object> argv[],
                                      MaybeHandle<Object>* exception_out = NULL);