dart:io | Change File.fullPath to FileSystemEntity.resolveSymbolicLinks.

runtime/bin/directory.cc

Index: runtime/bin/directory.cc
diff --git a/runtime/bin/directory.cc b/runtime/bin/directory.cc
index 0f771eecbdf38cde1ef019fd9b56c05e459db771..5d73ab8cfea18cf31dd84c10ae0a147351a832ab 100644
--- a/runtime/bin/directory.cc
+++ b/runtime/bin/directory.cc
@@ -5,6 +5,7 @@
 #include "bin/directory.h"
 
 #include "bin/dartutils.h"
+#include "bin/file.h"
 #include "bin/thread.h"
 #include "include/dart_api.h"
 #include "platform/assert.h"
@@ -291,6 +292,23 @@ static CObject* DirectoryRenameRequest(const CObjectArray& request,
 }
 
 
+static CObject* DirectoryResolveSymbolicLinksRequest(
+    const CObjectArray& request) {
+  if (request.Length() == 2 && request[1]->IsString()) {
+    CObjectString filename(request[1]);
+    char* result = File::GetCanonicalPath(filename.CString());
+    if (result != NULL) {
+      CObject* path = new CObjectString(CObject::NewString(result));
+      free(result);
+      return path;
+    } else {
+      return CObject::NewOSError();
+    }
+  }
+  return CObject::IllegalArgumentError();
+}
+
+
 static void DirectoryService(Dart_Port dest_port_id,
                              Dart_Port reply_port_id,
                              Dart_CObject* message) {
@@ -324,6 +342,9 @@ static void DirectoryService(Dart_Port dest_port_id,
         case Directory::kRenameRequest:
           response = DirectoryRenameRequest(request, reply_port_id);
           break;
+        case Directory::kResolveSymbolicLinksRequest:
+          response = DirectoryResolveSymbolicLinksRequest(request);
+          break;
         default:
           UNREACHABLE();
       }