Remove many features when building product mode

runtime/vm/metrics_test.cc

 // Copyright (c) 2014, 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/assert.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
 #include "vm/globals.h"
 #include "vm/json_stream.h"
 #include "vm/metrics.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
+#ifndef PRODUCT
+
 UNIT_TEST_CASE(Metric_Simple) {
   Dart_CreateIsolate(
       NULL, NULL, bin::isolate_snapshot_buffer, NULL, NULL, NULL);
   {
     Metric metric;
 
     // Initialize metric.
     metric.Init(Isolate::Current(), "a.b.c", "foobar", Metric::kCounter);
     EXPECT_EQ(0, metric.value());
     metric.increment();
@@ skipping 36 matching lines @@
     metric.PrintJSON(&js);
     const char* json = js.ToCString();
     EXPECT_STREQ("{\"type\":\"Counter\",\"name\":\"a.b.c\",\"description\":"
                  "\"foobar\",\"unit\":\"byte\","
                  "\"fixedId\":true,\"id\":\"metrics\\/native\\/a.b.c\""
                  ",\"value\":99.000000}", json);
   }
   Dart_ShutdownIsolate();
 }
 
+#endif  // !PRODUCT
+
 }  // namespace dart