Remove static mutexes/monitors from dart:io.

runtime/bin/socket.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 "bin/io_buffer.h"
 #include "bin/socket.h"
 #include "bin/dartutils.h"
 #include "bin/thread.h"
 #include "bin/utils.h"
 
 #include "platform/globals.h"
 #include "platform/thread.h"
 #include "platform/utils.h"
 
 #include "include/dart_api.h"
 
 
 namespace dart {
 namespace bin {
 
 static const int kSocketIdNativeField = 0;
 
-dart::Mutex Socket::mutex_;
+dart::Mutex* Socket::mutex_ = new dart::Mutex();
 int Socket::service_ports_size_ = 0;
 Dart_Port* Socket::service_ports_ = NULL;
 int Socket::service_ports_index_ = 0;
 
 
 static Dart_Handle GetSockAddr(Dart_Handle obj, RawAddr* addr) {
   Dart_TypedData_Type data_type;
   uint8_t* data = NULL;
   intptr_t len;
   Dart_Handle result = Dart_TypedDataAcquireData(
@@ skipping 509 matching lines @@
           UNREACHABLE();
       }
     }
   }
 
   Dart_PostCObject(reply_port_id, response->AsApiCObject());
 }
 
 
 Dart_Port Socket::GetServicePort() {
-  MutexLocker lock(&mutex_);
+  MutexLocker lock(mutex_);
   if (service_ports_size_ == 0) {
     ASSERT(service_ports_ == NULL);
     service_ports_size_ = 16;
     service_ports_ = new Dart_Port[service_ports_size_];
     service_ports_index_ = 0;
     for (int i = 0; i < service_ports_size_; i++) {
       service_ports_[i] = ILLEGAL_PORT;
     }
   }
 
@@ skipping 54 matching lines @@
   return Dart_SetNativeInstanceField(socket, kSocketIdNativeField, id);
 }
 
 
 Dart_Handle Socket::GetSocketIdNativeField(Dart_Handle socket, intptr_t* id) {
   return Dart_GetNativeInstanceField(socket, kSocketIdNativeField, id);
 }
 
 }  // namespace bin
 }  // namespace dart