Fix the definition of kIllegalPort in dart_api.h.

runtime/include/dart_api.h

 // 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.
 
 #ifndef INCLUDE_DART_API_H_
 #define INCLUDE_DART_API_H_
 
 /** \mainpage Dart Embedding API Reference
  *
  * Dart is a class-based programming language for creating structured
@@ skipping 787 matching lines @@
 DART_EXPORT void Dart_InterruptIsolate(Dart_Isolate isolate);
 
 // --- Messages and Ports ---
 
 /**
  * A port is used to send or receive inter-isolate messages
  */
 typedef int64_t Dart_Port;
 
 /**
- * kIllegalPort is a port number guaranteed never to be associated
- * with a valid port.
+ * ILLEGAL_PORT is a port number guaranteed never to be associated with a valid
+ * port.
  */
-const Dart_Port kIllegalPort = 0;
+#define ILLEGAL_PORT ((Dart_Port) 0)
 
 /**
  * A message notification callback.
  *
  * This callback allows the embedder to provide an alternate wakeup
  * mechanism for the delivery of inter-isolate messages.  It is the
  * responsibility of the embedder to call Dart_HandleMessage to
  * process the message.
  */
 typedef void (*Dart_MessageNotifyCallback)(Dart_Isolate dest_isolate);
@@ skipping 149 matching lines @@
  * Creates a new native port.  When messages are received on this
  * native port, then they will be dispatched to the provided native
  * message handler.
  *
  * \param name The name of this port in debugging messages.
  * \param handler The C handler to run when messages arrive on the port.
  * \param handle_concurrently Is it okay to process requests on this
  *                            native port concurrently?
  *
  * \return If successful, returns the port id for the native port.  In
- *   case of error, returns kIllegalPort.
+ *   case of error, returns ILLEGAL_PORT.
  */
 DART_EXPORT Dart_Port Dart_NewNativePort(const char* name,
                                          Dart_NativeMessageHandler handler,
                                          bool handle_concurrently);
 // TODO(turnidge): Currently handle_concurrently is ignored.
 
 /**
  * Closes the native port with the given id.
  *
  * The port must have been allocated by a call to Dart_NewNativePort.
@@ skipping 1597 matching lines @@
 // information that can be used for better profile reports for
 // dynamically generated code.
 DART_EXPORT void Dart_InitPprofSupport();
 DART_EXPORT void Dart_GetPprofSymbolInfo(void** buffer, int* buffer_size);
 
 // Support for generating flow graph compiler debugging output into a file.
 typedef void (*FileWriterFunction)(const char* buffer, int64_t num_bytes);
 DART_EXPORT void Dart_InitFlowGraphPrinting(FileWriterFunction function);
 
 #endif  // INCLUDE_DART_API_H_