Finish moving service protocol to json rpc.

runtime/vm/service/service.idl

Index: runtime/vm/service/service.idl
diff --git a/runtime/vm/service/service.idl b/runtime/vm/service/service.idl
index e91537814e81502cf4a3fe2f00271f86ae4e3ccb..0edb79bdc4545889dee824c4226faafb3f4f77c8 100644
--- a/runtime/vm/service/service.idl
+++ b/runtime/vm/service/service.idl
@@ -3,6 +3,17 @@
 //
 
 interface Service {
+  getVM() VM
+
+  getFlagList() FlagList
+
+  setFlag(name string, value string) Response
+
+  getObject(isolateId string, objectId string) Object
+
+  // The response is a subtype of Object or ObjectRef.
+  getObjectByAddress(address string, ref bool) Response
+
   // Returns the list of breakpoints for an isolate.
   getBreakpoints(isolateId string) BreakpointList
 
@@ -127,6 +138,16 @@ struct Response {
 }
 
 
+struct VM extends Response {
+  placeholder int
+}
+
+
+struct FlagList extends Response {
+  placeholder int
+}
+
+
 struct _EchoResponse extends Response {
   text string
 }