[Kernel] replace function debuggable field with originalAsyncMarker field

runtime/vm/kernel_to_il.cc

Index: runtime/vm/kernel_to_il.cc
diff --git a/runtime/vm/kernel_to_il.cc b/runtime/vm/kernel_to_il.cc
index d12987fae7982f10fa0cbd485b18b8f52d3299b7..61ff8afe8ca6f1ba63f4b3f1590b558585e6644e 100644
--- a/runtime/vm/kernel_to_il.cc
+++ b/runtime/vm/kernel_to_il.cc
@@ -6132,7 +6132,8 @@ Fragment FlowGraphBuilder::TranslateFunctionNode(FunctionNode* node,
       // NOTE: This is not TokenPosition in the general sense!
       function = Function::NewClosureFunction(
           *name, parsed_function_->function(), position);
-      function.set_is_debuggable(node->debuggable());
+      function.set_is_debuggable(node->original_async_marker() ==

[Kevin Millikin (Google), 2017/02/22 07:59:59]

Why not set the function to be correctly sync*/async/async*?

We should also (probably) set SyncYielding functions to be is_generated_body so
they get the correct SyncGenClosure/AsyncClosure/AsyncGenClosure status.

[jensj, 2017/02/22 10:36:45]

Done.

+                                 FunctionNode::kSync);
       function.set_end_token_pos(node->end_position());
       LocalScope* scope = scopes_->function_scopes[i].scope;
       const ContextScope& context_scope =