Implement delete on File objects.

runtime/bin/file_macos.cc

 // Copyright (c) 2011, 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 <errno.h>
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <unistd.h>
 #include <libgen.h>
 #include <limits.h>
@@ skipping 117 matching lines @@
 
 bool File::Create(const char* name) {
   int fd = open(name, O_RDONLY | O_CREAT, 0666);
   if (fd < 0) {
     return false;
   }
   return (close(fd) == 0);
 }
 
 
+bool File::Delete(const char* name) {
+  int status = remove(name);
+  if (status == -1) {
+    return false;
+  }
+  return true;
+}
+
+
 char* File::GetCanonicalPath(const char* pathname) {
   char* abs_path = NULL;
   if (pathname != NULL) {
     // On some older MacOs versions the default behaviour of realpath allocating
     // space for the resolved_path when a NULL is passed in does not seem to
     // work, so we explicitly allocate space. The caller is responsible for
     // freeing this space as in a regular realpath call.
     char* resolved_path = reinterpret_cast<char*>(malloc(PATH_MAX+1));
     ASSERT(resolved_path != NULL);
     abs_path = realpath(pathname, resolved_path);
     assert(abs_path == NULL || IsAbsolutePath(abs_path));
   }
   return abs_path;
 }
 
 
 const char* File::PathSeparator() {
   return "/";
 }
 
 
 const char* File::StringEscapedPathSeparator() {
   return "/";
 }