[kernel] Support for top-level generic functions.

runtime/vm/kernel_to_il.h

Index: runtime/vm/kernel_to_il.h
diff --git a/runtime/vm/kernel_to_il.h b/runtime/vm/kernel_to_il.h
index 7dac63910fa3afc047a95c9ed2a6fd8198e41298..1401b554ca436c79a3c296cdb85f77860aebb1eb 100644
--- a/runtime/vm/kernel_to_il.h
+++ b/runtime/vm/kernel_to_il.h
@@ -567,7 +567,8 @@ class FlowGraphBuilder {
   Fragment StaticCall(TokenPosition position,
                       const Function& target,
                       intptr_t argument_count,
-                      const Array& argument_names);
+                      const Array& argument_names,
+                      intptr_t type_args_len = 0);
   Fragment StoreIndexed(intptr_t class_id);
   Fragment StoreInstanceFieldGuarded(const dart::Field& field,
                                      bool is_initialization_store);
@@ -621,6 +622,7 @@ class FlowGraphBuilder {
 
   void Push(Definition* definition);
   Value* Pop();
+  intptr_t StackDepth();
   Fragment Drop();
 
   bool IsInlining() { return exit_collector_ != NULL; }