Move definition of trace_debug_protocol to dbg_connection.cc as this file is also linked into libvm…

runtime/bin/main.cc

 // Copyright (c) 2012, 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 <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "include/dart_api.h"
 #include "include/dart_debugger_api.h"
@@ skipping 328 matching lines @@
     return false;
   }
 
   start_vm_service = true;
 
   vm_options->AddArgument("--pause-isolates-on-exit");
   return true;
 }
 
 
-bool trace_debug_protocol = false;
+extern bool trace_debug_protocol;
 static bool ProcessTraceDebugProtocolOption(const char* arg,
                                             CommandLineOptions* vm_options) {
   if (*arg != '\0') {
     return false;
   }
   trace_debug_protocol = true;
   return true;
 }
 
 
@@ skipping 752 matching lines @@
   exit(Process::GlobalExitCode());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   dart::bin::main(argc, argv);
   UNREACHABLE();
 }