Display isolate message queue in Observatory debugger

runtime/vm/service_test.cc

Index: runtime/vm/service_test.cc
diff --git a/runtime/vm/service_test.cc b/runtime/vm/service_test.cc
index 31efafc915864179d618b3a9375d612a71d321cf..d17730418cd4d56e31726fb538ba73dcfbfb3d7e 100644
--- a/runtime/vm/service_test.cc
+++ b/runtime/vm/service_test.cc
@@ -506,6 +506,7 @@ TEST_CASE(Service_EmbedderRootHandler) {
   EXPECT_STREQ("{\"result\":beta, \"id\":\"0\"}", handler.msg());
 }
 
+
 TEST_CASE(Service_EmbedderIsolateHandler) {
   const char* kScript =
     "var port;\n"  // Set to our mock port by C++.
@@ -543,7 +544,6 @@ TEST_CASE(Service_EmbedderIsolateHandler) {
   EXPECT_STREQ("{\"result\":beta, \"id\":\"0\"}", handler.msg());
 }
 
-
 // TODO(zra): Remove when tests are ready to enable.
 #if !defined(TARGET_ARCH_ARM64)