Add Function based profile tree

runtime/vm/service_test.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 
 #include "include/dart_debugger_api.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
@@ skipping 1448 matching lines @@
   Service::HandleIsolateMessage(isolate, service_msg);
   handler.HandleNextMessage();
   // Expect error (tags required).
   EXPECT_SUBSTRING("\"type\":\"Error\"", handler.msg());
 
   service_msg =
       Eval(lib, "[0, port, 'getCpuProfile', ['tags'], ['None']]");
   Service::HandleIsolateMessage(isolate, service_msg);
   handler.HandleNextMessage();
   // Expect profile
-  EXPECT_SUBSTRING("\"type\":\"CpuProfile\"", handler.msg());
+  EXPECT_SUBSTRING("\"type\":\"_CpuProfile\"", handler.msg());
 
   service_msg =
       Eval(lib, "[0, port, 'getCpuProfile', ['tags'], ['Bogus']]");
   Service::HandleIsolateMessage(isolate, service_msg);
   handler.HandleNextMessage();
   // Expect error.
   EXPECT_SUBSTRING("\"type\":\"Error\"", handler.msg());
 }
 
 #endif  // !defined(TARGET_ARCH_ARM64)
 
 }  // namespace dart