Introduce (private) ZLibFilter to dart:io.

runtime/bin/dartutils.cc

 // 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.
 
 #include "bin/dartutils.h"
 
 #include "bin/extensions.h"
 #include "bin/directory.h"
 #include "bin/file.h"
 #include "include/dart_api.h"
@@ skipping 491 matching lines @@
   Dart_Handle args[2];
   args[0] = Dart_NewString(os_error->message());
   if (Dart_IsError(args[0])) return args[0];
   args[1] = Dart_NewInteger(os_error->code());
   if (Dart_IsError(args[1])) return args[1];
   Dart_Handle err = Dart_New(clazz, Dart_Null(), 2, args);
   return err;
 }
 
 
+Dart_Handle DartUtils::NewInternalError(const char* message) {
+  Dart_Handle url = Dart_NewString("dart:io");
+  if (Dart_IsError(url)) return url;
+  Dart_Handle lib = Dart_LookupLibrary(url);
+  if (Dart_IsError(lib)) return lib;
+  Dart_Handle class_name = Dart_NewString("InternalError");
+  if (Dart_IsError(class_name)) return class_name;
+  Dart_Handle clazz = Dart_GetClass(lib, class_name);
+  if (Dart_IsError(clazz)) return clazz;
+  Dart_Handle args[1];
+  args[0] = Dart_NewString(message);
+  if (Dart_IsError(args[0])) return args[0];
+  Dart_Handle err = Dart_New(clazz, Dart_Null(), 1, args);
+  return err;
+}
+
+
 void DartUtils::SetOriginalWorkingDirectory() {
   original_working_directory = Directory::Current();
 }
 
 
 // Statically allocated Dart_CObject instances for immutable
 // objects. As these will be used by different threads the use of
 // these depends on the fact that the marking internally in the
 // Dart_CObject structure is not marking simple value objects.
 Dart_CObject CObject::api_null_ = { Dart_CObject::kNull , { 0 } };
@@ skipping 133 matching lines @@
 
 CObject* CObject::NewOSError(OSError* os_error) {
   CObject* error_message =
       new CObjectString(CObject::NewString(os_error->message()));
   CObjectArray* result = new CObjectArray(CObject::NewArray(3));
   result->SetAt(0, new CObjectInt32(CObject::NewInt32(kOSError)));
   result->SetAt(1, new CObjectInt32(CObject::NewInt32(os_error->code())));
   result->SetAt(2, error_message);
   return result;
 }