Add apply method signature to Function class.

lib/compiler/implementation/lib/core_patch.dart

Index: lib/compiler/implementation/lib/core_patch.dart
diff --git a/lib/compiler/implementation/lib/core_patch.dart b/lib/compiler/implementation/lib/core_patch.dart
index 87ce0edfa71f25a3454b9af9d13f2fb0eacae920..f47c27b840561e48ef14845cb5d63c9289a49fa5 100644
--- a/lib/compiler/implementation/lib/core_patch.dart
+++ b/lib/compiler/implementation/lib/core_patch.dart
@@ -29,6 +29,14 @@ patch class Object {
   }
 }
 
+// Patch for Function implementation.
+patch class Function {
+  patch static apply(Function function,
+                     List positionalArguments,
+                     [Map<String,Dynamic> namedArguments]) {
+    throw new NotImplementedException("Function.apply is not implemented");
+  }
+}
 
 // Patch for Expando implementation.
 patch class Expando<T> {