Remove many features when building product mode

runtime/vm/report.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 "vm/report.h"
 
 #include "vm/code_patcher.h"
 #include "vm/exceptions.h"
 #include "vm/flags.h"
 #include "vm/longjump.h"
@@ skipping 231 matching lines @@
   const TokenPosition token_pos = caller_code.GetTokenIndexOfPC(caller_pc);
   const Function& caller = Function::Handle(zone, caller_code.function());
   const Script& script = Script::Handle(zone, caller.script());
   MessageF(kJSWarning, script, token_pos, Report::AtLocation, "%s", msg);
 }
 
 
 void Report::TraceJSWarning(const Script& script,
                             TokenPosition token_pos,
                             const String& message) {
+  if (!FLAG_support_service) {
+    return;
+  }
   const int64_t micros = OS::GetCurrentTimeMicros();
   Isolate* isolate = Isolate::Current();
   TraceBuffer* trace_buffer = isolate->trace_buffer();
   if (trace_buffer == NULL) {
     TraceBuffer::Init(isolate);
     trace_buffer = isolate->trace_buffer();
   }
   JSONStream js;
   {
     JSONObject trace_warning(&js);
     trace_warning.AddProperty("type", "JSCompatibilityWarning");
     trace_warning.AddProperty("script", script);
     trace_warning.AddProperty("tokenPos", token_pos);
     trace_warning.AddProperty("message", message);
   }
   trace_buffer->Trace(micros, js.ToCString(), true);  // Already escaped.
 }
 
 }  // namespace dart