Allow for embedder provided service request handlers

runtime/bin/vmservice_impl.cc

Index: runtime/bin/vmservice_impl.cc
diff --git a/runtime/bin/vmservice_impl.cc b/runtime/bin/vmservice_impl.cc
index b35c67e00ed72a974a17a9be38bdfd6fb11efb87..14b49735d93e9f3341c92350d38ff23e759d5810 100644
--- a/runtime/bin/vmservice_impl.cc
+++ b/runtime/bin/vmservice_impl.cc
@@ -86,11 +86,30 @@ class Resources {
 
 const char* VmService::error_msg_ = NULL;
 
+static void* embedder_request_callback_user_data = reinterpret_cast<void*>(0x3);
+
+static const char* embedder_request_callback(const char* name,
+                                             const char** arguments,
+                                             intptr_t num_arguments,
+                                             const char** option_keys,
+                                             const char** option_values,
+                                             intptr_t num_options,
+                                             void* user_data) {
+  ASSERT(user_data == embedder_request_callback_user_data);
+  return strdup("{\"type\": \"EmbedderString\",\"value\":\"Standalone\"}");

[turnidge, 2014/02/18 21:27:05]

Maybe Embedder or EmbedderId instead of EmbedderString?

[Cutch, 2014/02/18 22:18:51]

Done.

+}
+
+
 bool VmService::Start(intptr_t server_port) {
   bool r = _Start(server_port);
   if (!r) {
     return r;
   }
+  // Register an embedder provided request callback.
+  Dart_RegisterServiceRequestCallback(
+      "_embedder",
+      embedder_request_callback,
+      embedder_request_callback_user_data);
   // Start processing messages in a new thread.
   dart::Thread::Start(ThreadMain, NULL);
   return true;