Elide the "size" property from a unit test -- platform specific.

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 566 matching lines @@
   EXPECT_STREQ(
       "{\"type\":\"Sentinel\",\"id\":\"objects\\/expired\","
       "\"valueAsString\":\"<expired>\"}",
       handler.msg());
 
   // bool
   service_msg = Eval(lib, "[0, port, ['objects', 'bool-true'], [], []]");
   Service::HandleIsolateMessage(isolate, service_msg);
   handler.HandleNextMessage();
   handler.filterMsg("_vmName");
+  handler.filterMsg("size");
   EXPECT_STREQ(
       "{\"type\":\"bool\","
       "\"class\":{\"type\":\"@Class\",\"id\":\"classes\\/46\","
       "\"name\":\"bool\"},"
-      "\"size\":8,\"fields\":[],\"id\":\"objects\\/bool-true\","
+      "\"fields\":[],\"id\":\"objects\\/bool-true\","
       "\"valueAsString\":\"true\"}",
       handler.msg());
 
   // int
   service_msg = Eval(lib, "[0, port, ['objects', 'int-123'], [], []]");
   Service::HandleIsolateMessage(isolate, service_msg);
   handler.HandleNextMessage();
   handler.filterMsg("_vmName");
   EXPECT_STREQ(
       "{\"type\":\"int\",\"_vmType\":\"Smi\","
@@ skipping 1592 matching lines @@
   service_msg = Eval(lib, "[0, port, ['profile'], ['tags'], ['hidden']]");
   Service::HandleIsolateMessage(isolate, service_msg);
   handler.HandleNextMessage();
   // Expect error.
   EXPECT_SUBSTRING("\"type\":\"Error\"", handler.msg());
 }
 
 #endif  // !defined(TARGET_ARCH_ARM64)
 
 }  // namespace dart