Change how File/Directory/Link .delete works.

runtime/bin/file.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/file.h"
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "bin/io_buffer.h"
 #include "bin/thread.h"
@@ skipping 470 matching lines @@
     Dart_SetReturnValue(args, Dart_NewBoolean(result));
   } else {
     Dart_Handle err = DartUtils::NewDartOSError();
     if (Dart_IsError(err)) Dart_PropagateError(err);
     Dart_SetReturnValue(args, err);
   }
   Dart_ExitScope();
 }
 
 
+void FUNCTION_NAME(File_DeleteLink)(Dart_NativeArguments args) {
+  Dart_EnterScope();
+  const char* str =
+      DartUtils::GetStringValue(Dart_GetNativeArgument(args, 0));
+  bool result = File::DeleteLink(str);
+  if (result) {
+    Dart_SetReturnValue(args, Dart_NewBoolean(result));
+  } else {
+    Dart_Handle err = DartUtils::NewDartOSError();
+    if (Dart_IsError(err)) Dart_PropagateError(err);
+    Dart_SetReturnValue(args, err);
+  }
+  Dart_ExitScope();
+}
+
+
 void FUNCTION_NAME(File_Directory)(Dart_NativeArguments args) {
   Dart_EnterScope();
   const char* str =
       DartUtils::GetStringValue(Dart_GetNativeArgument(args, 0));
   char* str_copy = strdup(str);
   char* path = File::GetContainingDirectory(str_copy);
   free(str_copy);
   if (path != NULL) {
     Dart_SetReturnValue(args, DartUtils::NewString(path));
     free(path);
@@ skipping 489 matching lines @@
         return CObject::NewOSError();
       }
     } else {
       return CObject::FileClosedError();
     }
   }
   return CObject::IllegalArgumentError();
 }
 
 
+static CObject* FileDeleteLinkRequest(const CObjectArray& request) {
+  if (request.Length() == 2 && request[1]->IsString()) {
+    CObjectString filename(request[1]);
+    bool result = File::DeleteLink(filename.CString());
+    if (result) {
+      return CObject::True();
+    } else {
+      return CObject::NewOSError();
+    }
+  }
+  return CObject::False();
+}
+
+
 static void FileService(Dart_Port dest_port_id,
                  Dart_Port reply_port_id,
                  Dart_CObject* message) {
   CObject* response = CObject::IllegalArgumentError();
   CObjectArray request(message);
   if (message->type == Dart_CObject::kArray) {
     if (request.Length() > 1 && request[0]->IsInt32()) {
       CObjectInt32 requestType(request[0]);
       switch (requestType.Value()) {
         case File::kExistsRequest:
@@ skipping 46 matching lines @@
           break;
         case File::kReadRequest:
           response = FileReadRequest(request);
           break;
         case File::kReadListRequest:
           response = FileReadListRequest(request);
           break;
         case File::kWriteListRequest:
           response = FileWriteListRequest(request);
           break;
+        case File::kDeleteLinkRequest:
+          response = FileDeleteLinkRequest(request);
+          break;
         default:
           UNREACHABLE();
       }
     }
   }
 
   Dart_PostCObject(reply_port_id, response->AsApiCObject());
 }
 
 
 Dart_Port File::GetServicePort() {
   return file_service_.GetServicePort();
 }
 
 
 void FUNCTION_NAME(File_NewServicePort)(Dart_NativeArguments args) {
   Dart_EnterScope();
   Dart_SetReturnValue(args, Dart_Null());
   Dart_Port service_port = File::GetServicePort();
   if (service_port != ILLEGAL_PORT) {
     // Return a send port for the service port.
     Dart_Handle send_port = Dart_NewSendPort(service_port);
     Dart_SetReturnValue(args, send_port);
   }
   Dart_ExitScope();
 }