2nd attempt at adding streamListen/streamCancel to the service protocol.

runtime/bin/main.cc

Index: runtime/bin/main.cc
diff --git a/runtime/bin/main.cc b/runtime/bin/main.cc
index 7bb98a12a1a9fdb668207f69496db8c805923481..d1e80d6e7a1f55e2560ac060da87df5559018ea0 100644
--- a/runtime/bin/main.cc
+++ b/runtime/bin/main.cc
@@ -834,8 +834,8 @@ class DartScope {
 };
 
 
-static const char* ServiceRequestHandler(
-    const char* name,
+static const char* ServiceGetIOHandler(
+    const char* method,
     const char** param_keys,
     const char** param_values,
     intptr_t num_params,
@@ -957,7 +957,7 @@ void main(int argc, char** argv) {
   }
 
   Dart_RegisterIsolateServiceRequestCallback(
-        "io", &ServiceRequestHandler, NULL);
+        "getIO", &ServiceGetIOHandler, NULL);
 
   // Call CreateIsolateAndSetup which creates an isolate and loads up
   // the specified application script.